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XC9503 Series
2ch. Step-down DC/DC Controller ICs
Mar. 14, 2003 Ver. 2
Applications
2ch DC/DC Controller (Step-down + Step-down) Input Voltage Range 2.0V ~ 10.0V Output Voltage Externally Set-Up Switching Frequency 300kHz (15%) Maximum Duty Cycle 100% PWM, PWM/PFM Switching Control High Efficiency Step-down 92% (Typ.) Small MSOP-10 package PDAs Palm Top Computers Digital Cameras Various Multi-Function Power Supplies
Features
Input Voltage Range : 2.0V ~ 10V Power Supply Voltage Range : 2.0V ~ 10V Output Voltage Range : 0.9V ~ 6.0V Can be set freely with 0.9V (2.0%) of reference voltage supply and external components. Oscillation Frequency Output Current Stand-By Function Package Soft-Start Time : 300kHz 15%
General Description
The XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC controller ICs. Since the series has a built-in 0.9V reference voltage (accuracy 2%), 0.9V to 6.0V can be set using external components. With a 300kHz frequency, the size of the external components can be reduced. Switching frequencies of 180kHz & 500kHz are also available as customdesigned products. The control of the XC9503 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is highly efficient from light loads through to large output currents. Noise is easily reduced with PWM control since the frequency is fixed. The series gives freedom to select control suited to the application. Soft-start time is internally set to 10msec and offers protection against in-rush currents when the power is switched on and also protects against voltage overshoot.
(180kHz, 500kHz custom)
: more than 1000mA (VIN=5.0V, VOUT=3.3V)
: 3.0A (MAX.) : MSOP-10 : 10 ms (internally set)
Typical Performance Characteristics
XC9503B093A (300kHz,VOUT1:3.3V)
L1=22H(CDRH5D28), CL1=47F(Tantalum) SD1:MA2Q737, Tr1:XP162A1355P
100 90 Efficiency 1 EFFI1 (%) 80 70 60 50 40 30 20 10 0 0.1
PWM PWM/PFM Switching
VIN=5.0V
Typical Application Circuit
XC9503B093A Input : VOUT1 : 3.3V, VOUT2 : 1.8V
L1:22H CDRH5D28 Tr1:Pch MOSFET XP162A12A6P
1 10 100 Output Current 1 IOUT1(mA)
1000
VOUT1:3.3V
Tr2:Pch MOSFET XP162A12A6P
L2:22H CDRH5D28 VOUT2:1.8V SD2 :MA2Q737
SD1 :MA2Q737 RFB11 :200k CFB1 :62pF
VIN =5.0V
CIN :47F
CFB2 :62pF
1 EXT1/ EXT2/ 10 GND 9 FB2 8 PWM2 7 EN2 6 VPWM2 VEN2
RFB21 :220k CL2: 47FX2
CL1: 47FX2
VPWM1
2 VDD 3 FB1 4 PWM1 5 EN1
RFB12 :75k
VEN1
RFB22 :220k
1
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Pin Configuration
1 EXT1 2 VDD 3 FB1 4 PWM1 5 EN1
EXT2 10 GND 9 FB2 8 PWM2 7 EN2 6
MSOP-10 (TOP VIEW)
Pin Assignment
PIN NUMBER 1 2 3 4 5 6 7 8 9 10 PIN NAME EXT 1 VDD FB1 PWM1 EN1 EN2 PWM2 FB2 GND EXT 2 FUNCTIONS Channel 1: External Transistor Drive Pin Supply Voltage Channel 1 : Output Voltage Monitor Feedback Pin Channel 1 : PWM/PFM Switching Pin Channel 1 : Enable Pin Channel 2 : Enable Pin Channel 2 : PWM/PFM Switching Pin Channel 2 : Output Voltage Monitor Feedback Pin Ground Channel 2 : External Transistor Drive Pin
Ordering Information
XC9503123456
DESIGNATOR SYMBOL DESCRIPTION Standard (10 Pin) FB Voltage 0.9V Switching Frequency 180kHz (custom) 300kHz 500kHz (custom) Package Embossed Tape MSOP-10 Standard Feed Reverse Feed
1 2 3 4 5 6
B 0 9 2 3 5 A R L
2
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Block Diagram
EXT1
PWM/PFM Controller 1
PWM/PFM Controller 2
EXT2
PWM Comparator1
PWM Comparator2
VDD
+
-
-
+
GND
FB1
+ Error Amp1 Ramp Wave Generator 1
+ Ramp Wave Error Amp2 Generator 2
FB2
PWM1
OSC Generator Vref1 = 0.9V with Soft Start1, EN1 EN1 to internal circuit Vref2 = 0.9V with Soft Start 1, EN2
PWM2
EN1
EN2
EN2 to internal circuit
Absolute Maximum Ratings
Ta=25OC PARAMETER VDD Pin Voltage FB1, 2 Pin Voltage EN1, 2 Pin Voltage PWM1,2 Pin Voltage EXT1, 2 Pin Voltage EXT1, 2 Pin Current Power Dissipation Operating Ambient Temperature Storage Temperature SYMBOL VDD VFB VEN VPWM VEXT IEXT Pd Topr Tstg RATINGS - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ VDD + 0.3 100 150 - 40 ~ + 85 UNITS V V V V V mA mW
O O
C
C - 55 ~ +125 * Voltage goes to Ground.
3
XC9503 Series
Electrical Characteristics
Common Characteristics PARAMETER Supply Voltage Max. Input Voltage Output Voltage Range (note 1) Supply Current 1 SYMBOL VDD VIN VOUTSET IDD1 VIN 2.0V, IOUT1, 2=1mA
2ch. Step-down DC/DC Controller ICs
XC9503B092A
Ta=25OC CONDITIONS MIN. 2.0 10.0 0.9 0.9 153 0.65 TYP. 60 50 60 60 1.0 180 MAX. 10.0 10.0 10.0 120 110 130 140 3.0 207 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 UNITS V V V V A A A A A kHz V V A A A A A A
TEST CIRCUIT
1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2
VOUT1 VOUT2
FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V EN1,2 "Low" Current IENL EN1,2=0V, FB1,2=3.0V PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Output 1 Characteristics PARAMETER FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 Efficiency1 (note 2) SYMBOL VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 EFFI1 Step-down Controller CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 x 0.95V, EN1=0V0.65V
MIN. 0.882 100 22 -
TYP. 0.900 30 92
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
3 1 2 2 4 4 4 5 5 4 4
Soft-Start Time1 TSS1 10.0 5.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 22 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics PARAMETER FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 Efficiency2 (note 2) SYMBOL VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 EFFI2 Step-down Controller CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 x 0.95V, EN2=0V0.65V MIN. 0.882 100 22 TYP. 0.900 30 92
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
6 1 2 2 7 7 7 5 5 7 7
10.0 5.0 TSS2 Soft-Start Time 2 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V 28 EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 VPWMH2 No Load 0.65 PWM2 "High" Voltage PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Notes
1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
4
XC9503 Series
Electrical Characteristics
Common Characteristics PARAMETER Supply Voltage Max. Input Voltage Output Voltage Range (note 1) Supply Current 1 SYMBOL VDD VIN VOUTSET IDD1 VIN 2.0V, IOUT1, 2=1mA
2ch. Step-down DC/DC Controller ICs
XC9503B093A
Ta=25OC CONDITIONS MIN. 2.0 10.0 0.9 0.9 255 0.65 TYP. 70 60 70 80 1.0 300 MAX. 10.0 10.0 10.0 140 120 150 150 3.0 345 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 UNITS V V V V A A A A A kHz V V A A A A A A
TEST CIRCUIT
1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2
VOUT1 VOUT2
FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V EN1,2 "Low" Current IENL EN1,2=0V, FB1,2=3.0V PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Output 1 Characteristics PARAMETER FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 Efficiency1 (note 2) SYMBOL VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 EFFI1 Step-down Controller CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 x 0.95V, EN1=0V0.65V
MIN. 0.882 100 22 -
TYP. 0.900 30 92
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
3 1 2 2 4 4 4 5 5 4 4
Soft-Start Time1 TSS1 5.0 10.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V 22 PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics PARAMETER FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 Efficiency2 (note 2) SYMBOL VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 EFFI2 Step-down Controller CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 x 0.95V, EN2=0V0.65V MIN. 0.882 100 22 TYP. 0.900 30 92
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
6 1 2 2 7 7 7 5 5 7 7
Soft-Start Time 2 TSS2 5.0 10.0 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V 28 EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 PWM2 "High" Voltage VPWMH2 No Load 0.65 PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Notes
1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
5
XC9503 Series
Electrical Characteristics
Common Characteristics PARAMETER Supply Voltage Max. Input Voltage Output Voltage Range (note 1) Supply Current 1 SYMBOL VDD VIN Voutset IDD1 VIN 2.0V, IOUT1, 2=1mA
2ch. Step-down DC/DC Controller ICs
XC9503B095A
Ta=25OC CONDITIONS MIN. 2.0 10.0 0.9 0.9 425 0.65 TYP. 90 80 100 100 1.0 500 MAX. 10.0 10.0 10.0 170 150 180 190 3.0 575 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 UNITS V V V V A A A A A kHz V V A A A A A A
TEST CIRCUIT
1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2
VOUT1 VOUT2
FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V IENL EN1,2=0V, FB1,2=3.0V EN1,2 "Low" Current PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Output 1 Characteristics PARAMETER FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 Efficiency1 (note 2) SYMBOL VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 EFFI1 Step-down Controller CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 x 0.95V, EN1=0V0.65V
MIN. 0.882 100 22 -
TYP. 0.900 30 91
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
3 1 2 2 4 4 4 5 5 4 4
10.0 Soft-Start Time1 TSS1 5.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V 22 PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics PARAMETER FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 Efficiency2 (note 2) SYMBOL VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 EFFI2 Step-down Controller CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 x 0.95V, EN2=0V0.65V MIN. 0.882 100 22 TYP. 0.900 30 91
MAX. 0.918 2.0 0 38 20.0 47 30 0.20
UNITS V V % % % % mS V V
TEST CIRCUIT
6 1 2 2 7 7 7 5 5 7 7
10.0 Soft-Start Time 2 TSS2 5.0 28 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 PWM2 "High" Voltage VPWMH2 No Load 0.65 PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Notes
1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
6
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Operational Description
The XC9503 series are multi-functional, 2 channel step-down DC/DC converter controller ICs with built-in high speed, low ON resistance drivers. The Error Amplifier is designed to monitor the output voltage and it compares the feedback voltage (FB) with the reference voltage. In response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp. decreases. This circuit generates the Switching Frequency which in turn generates the reference clock. The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the Phase Shift Generator. The PWM Comparator compares outputs from the Error Amp. and saw-tooth waveform. When the voltage from the Error Amp's output is low, the external switch will be set to ON. This circuit generates PFM pulses. Control can be switched between PWM control and PWM/PFM automatic switching control using external signals. The PWM/PFM automatic switching mode is selected when the voltage of the PWM1 (2) pin is less than 0.2V, and the control switches between PWM and PFM automatically depending on the load. As the PFM circuit generates pulses based on outputs from the PWM comparator, shifting between modes occurs smoothly. PWM control mode is selected when the voltage of the PWM1 (2) pin is more than 0.65V. Noise is easily reduced with PWM control since the switching frequency is fixed. Control suited to the application can easily be selected which is useful in audio applications, for example, where traditionally, efficiencies have been sacrificed during stand-by as a result of using PWM control (due to the noise problems associated with the PFM mode in stand-by).
The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer to page 8). To protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load capacitor (CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary. This function controls the operation and shutdown of the IC. When the voltage of the EN1 or EN2 pins is 0.2V or less, the mode will be chip disable, the channel's operations will stop and the EXT pins will be kept at a highlevel (the external P-type MOSFET will be OFF). When both EN1 and EN2 are in a state of chip disable, current consumption will be no more than 3.0 A. When the EN1 or EN2 pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence. With softstart, 95% of the set output voltage will be reached within 10mS (TYP) from the moment of chip enable.
7
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB11(RFB21) and RFB12(RFB22). The sum of RFB11(RFB21) and RFB12(RFB22) should normally be 1 M or VOUT=0.9 x (RFB11+RFB12) /RFB12 The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2 x x CFB1 x RFB11) which is equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load capacity (CL). [Example of Calculation] When RFB11=200k and RFB12=75k, VOUT1=0.9 x (200k+75k) / 75k=3.3V. [Typical Example] RFB11 RFB12 RFB11 VOUT CFB1 VOUT (V) (pF) (V) (k) (k) (k) 1.0 1.5 1.8 2.0 2.2 30 220 220 330 390 270 330 220 270 270 430 62 62 39 33 2.5 2.7 3.0 3.3 5.0 390 360 560 200 82
RFB12 (k) 220 180 240 75 18
CFB1 (pF) 33 33 24 62 160
The same method can be adopted for channel two also. [External Components] Tr : * MOSFET XP162A12A6P (TOREX P-Channel Power MOSFET) Note : VGS Breakdown Voltage of this Tr. is 12V so please be careful with the power supply voltage. MA2Q737 (Schottky , MATSUSHITA) CMS02 (Schottky, TOSHIBA) 10H (SUMIDA, CDRH5D28, FOSC = 500kHz) 22H (SUMIDA, CDRH5D28, FOSC = 300kHz) 22H (SUMIDA, CDRH5D28, FOSC = 180kHz) 16V, 47F (Tantalum) Increase capacity according to the equation below when the step-up voltage ratio is large and output current is high.
C=(CL standard value)x(IOUT (mA)/500mAxVOUT/VIN
SD : L:
CL :
Tr : RB :
* PNP MOSFET 2SA1213 (SANYO) 500 ( Adjust in accordance with load & Tr.'s HFE.) Set according to the equation below. RB (VIN-0.7) x hFE / IC-REXTBH 2200pF (Ceramic) Set according to the equation below. CB (2 x RB x FOSC x 0.7)
CB :
The same components can be adopted for both channel 1 and channel 2.
8
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Test Circuits
Circuit 1
L1 VOUT1 PNP Tr1 VI
N
Circuit 5
PNP Tr2 C IN L2 VOUT2 1 EXT1 2 VDD A RFB21 CFB1 SBD1 1F 3 FB1 4 PWM1 FB2 8 PWM2 7 RFB22 5 EN1 EN2 6 VFB1 VEN 1 VEN 2 VFB2 CL2 RL2 V EXT1 1 F VDD VPWM1 2 VDD GND 9 SBD2 CFB2 4 PWM1 5 EN 1 PWM2 7 EN2 6 VPWM2 VEXT2 3 FB1 FB2 8 EXT2 10 CIN GND 9 A
22 00p F
5 10
2 200pF
5 10
1 EXT1 RFB11
EXT2 10
RL1
CL1
RFB12
Circuit 2
Circuit 6
Pch MOSFET2 1 EXT1 2 VDD 3 FB1 EXT2 10 GND 9 FB2 8 PWM2 7 EN2 6 A A A OSC A A VIN 1 EXT1 2 VDD 3 FB1 4 PWM1 VDD VFB1 VPWM1 VEN1 V EN2 VPWM2 VFB2 5 EN1 EXT2 10 GND 9 FB2 8 PWM2 7 EN2 6 V CL2 RL SBD2 L2
VOUT2
A OSC A 1 F A A
4 PWM1 5 EN1
Circuit 3
L1 VOUT1 Pch MOSFET1 A CIN 1 EXT1 SBD1 2 VDD V RL 4 PWM1 5 EN1 PWM2 7 EN2 6 CL1 3 FB1 GND 9 FB2 8 EXT2 10 VIN CIN
Circuit 7
Pch MOSFET2 L2 VOUT2
A SBD2 VIN 1 EXT1 2 VDD 3 FB1 4 PWM1 5 EN1 EXT2 10 200k GND 9 FB2 8 PWM2 7 75k EN 6 2 62 pF V CL2 RL A
A
Circuit 4
L1 VOUT1 Pch MOSFET1 A
A CL1 V RL
200k 62pF SBD1
1 EXT1 2 VDD 3 FB1
EXT2 10 GND 9 FB2 8 PWM2 7 EN2 6
VIN CIN
75k
4 PWM1 5 EN1
9
XC9503 Series
2ch. Step-down DC/DC Controller ICs
Peripheral Components Used for Test Circuits
Circuit 1 L1, L2 : 22H (SUMIDA CDRH5D28) : XC9503B092A 15H (SUMIDA CDRH5D28) : XC9503B093A 10H (SUMIDA CDRH5D28) : XC9503B095A CRS02 (Schottky diode, TOSHIBA) EC10QS06 (Schottky diode, NIHON INTER) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 2SA1213 (TOSHIBA) Please use by the conditions as below. RFB11 + RFB12 1M RFB21 + RFB22 1M RFB11 / RFB12 = (Setting Output Voltage / 0.9) -1 VOUT2=(0.9-VOUT1) X (RFB21/RFB22) + 0.9V Please adjust as below: fzfb=1/(2 x x CFB1 x RFB11) = 1kHz ~50kHz ( 12kHz usual) fzfb=1/(2 x x CFB2 x RFB21) = 1kHz ~50kHz ( 12kHz usual) 22H (SUMIDA CDRH5D28) MA2Q737 (Schottky diode, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX)
SD1, SD2 : CL1, CL2 : CIN : PNP Tr1, 2: RFB :
CFB :
Circuits 3 L1 : SD1 : CL1 : CIN : P-ch MOSFET1 : Circuits 4 L1 : 22H (SUMIDA CDRH5D28) : XC9503B092A 15H (SUMIDA CDRH5D28) : XC9503B093A 10H (SUMIDA CDRH5D28) : XC9503B095A MA2Q737 (Schottky, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX)
SD1 : CL1 : CIN : P-ch MOSFET1 : Circuit 6 L1 : SD1 : CL1 : CIN : P-ch MOSFET2 : Circuit 7 L2 :
22H (SUMIDA CDRH5D28) MA2Q737 (Schottky diode, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP162A12A6P (TOREX)
SD2 : CL2 : CIN : P-ch MOSFET2 :
22H (SUMIDA CDRH5D28) : XC9503B092A 15H (SUMIDA CDRH5D28) : XC9503B093A 10H (SUMIDA CDRH5D28) : XC9503B095A MA2Q737 (Schottky, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX)
10
XC9503 Series
Notes on Use
2ch. Step-down DC/DC Controller ICs
1. Checking for Intermittent Oscillation The XC9503 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low (e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under your operating conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance CL.
2. PWM/PFM Automatic Switching If PWM/PFM automatic switching control is selected and the step-down ratio is high (e.g., from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under continuous-duty condition is smaller than the PFM duty ratio of the XC9503 series. The output voltage's ripple voltage becomes substantially high under heavy load conditions, with the XC9503 series appearing to be producing an abnormal oscillation. If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM setting. For use under the above-mentioned condition, measured data of PWM/PFM automatic switching control shown on the data sheets are available up to IOUT = 100 mA.
3. Ratings Use the XC9503 series and peripheral components within the limits of their ratings.
11
XC9503 Series
Typical Performance Characteristics
(1) Output Voltage vs. Output Current
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=1.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOCS=300kHz, VOUT1, 2=1.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
1.2 Output Voltage1, 2 VOUT1, 2 (V) 1.1 1.0 0.9 0.8 0.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V Output Voltage1, 2 VOUT1, 2 (V)
PWM Control
1.2
PWM/PFM Switching Control
1.1 5.0V 1.0 0.9 0.8 0.7 0.1 1 10
VIN=2.7V 3.3V
4.2V, 6.0V 8.0V 10.0V
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=1.8V
2.0 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=1.8V
2.0 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
1.9
1.9
6.0V 8.0V 10.0V
1.8
1.8
1.7 VIN= 2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
1.7 VIN= 2.7V 3.3V 4.2V 5.0V 1.6
1.6
1.5 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
1.5 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=2.5V
2.7 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=2.5V
2.7 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
2.6
10.0V
2.6 8.0V 2.5
10.0V
2.5
2.4 VIN= 2.7V 3.3V 4.2V 5.0V 6.0V 8.0V
2.4 3.3V 4.2V 5.0V 6.0V 2.3 VIN=2.7V
2.3
2.2 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
2.2 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
12
XC9503 Series
(1) Output Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=3.3V
3.5 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=3.3V
3.5 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
3.4
VIN=4.2V 5.0V 6.0V 8.0V
3.4
VIN=4.2V 5.0V 6.0V 8.0V
3.3 10.0V
3.3
3.2
3.2
10.0V
3.1
3.1
3.0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
3.0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=5.0V
5.2 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=5.0V
5.2 Output Voltage1, 2 VOUT1, 2 (V)
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
5.1
10.0V
5.1
10.0V
5.0 VIN= 6.0V 8.0V
5.0 VIN= 6.0V 8.0V 4.9
4.9
4.8
4.8
4.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
4.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=1.0V
1.2 Output Voltage1, 2 VOUT1, 2 (V)
L=47H(CDRH6D38), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=180kHz, VOUT1, 2=1.0V
1.2 Output Voltage1, 2 VOUT1, 2 (V)
L=47H(CDRH6D38), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
1.1
10.0V
1.1
10.0V
1.0
1.0
0.9
VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V
0.9
4.2V 5.0V 6.0V 8.0V VIN=2.7V 3.0V
0.8
0.8
0.7 0.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
13
XC9503 Series
(1) Output Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=180kHz, VOUT1, 2=3.3V
3.5 Output Voltage1, 2 VOUT1, 2 (V) 3.4 3.3 3.2 VIN=4.2V 5.0V 6.0V 8.0V 10V 3.1 3.0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=47H(CDRH6D38), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOSC=180kHz, VOUT1, 2=5.0V
5.2 Output Voltage1, 2 VOUT1, 2 (V) 5.1 5.0 4.9 VIN= 6.0V 8.0V 10V 4.8 4.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=47H(CDRH6D38), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
PWM/PFM Switching Control PWM Control
FOSC=500kHz, VOUT1, 2=1.0V
1.2 Output Voltage1, 2 VOUT1, 2 (V) 1.1 1.0 0.9 0.8 0.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=500kHz, VOUT1, 2=1.0V
1.2 Output Voltage1, 2 VOUT1, 2 (V) 1.1 1.0 0.9 0.8 0.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10.0V
FOSC=500kHz, VOUT1, 2=3.3V
3.5 Output Voltage1, 2 VOUT1, 2 (V) 3.4 3.3 VIN=4.2V 5.0V 6.0V 8.0V 10V 3.2 3.1 3.0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=500kHz, VOUT1, 2=3.3V
3.5 Output Voltage1, 2 VOUT1, 2 (V) 3.4 3.3 VIN=4.2V 5.0V 6.0V 8.0V 3.2 3.1 3.0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
10.0V
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
14
XC9503 Series
(1) Output Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=500kHz, VOUT1, 2=5.0V
5.2 Output Voltage1, 2 VOUT1, 2 (V) 5.1 5.0 VIN= 6.0V 8.0V 10V 4.9 4.8 4.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
15
XC9503 Series
(2) Efficiency vs. Output Current
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=1.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
FOSC=300kHz, VOUT1, 2=1.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
100 Efficiency1, 2 EFFI1, 2 (%) 80 60
100 Efficiency1, 2 EFFI1, 2 (%) 80
10.0V 6.0V 8.0V
60 40 20 VIN=5.0V 0
4.2V 40 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 3.3V VIN=2.7V
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=1.8V
100 Efficiency1, 2 EFFI1, 2 (%) 80 VIN= 2.7V 60 3.3V 40 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 4.2V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOSC=300kHz, VOUT1, 2=1.8V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
100 Efficiency1, 2 EFFI1, 2 (%) 80
10.0V 60 40 6.0V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=5.0V 8.0V
FOSC=300kHz, VOUT1, 2=2.5V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOSC=300kHz, VOUT1, 2=2.5V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
100 Efficiency1, 2 EFFI1, 2 (%) 80
100 Efficiency1, 2 EFFI1, 2 (%) 80 10V 60
VIN=2.7V 60 40 20
PWM/PFM Switching Control PWM Control
3.3V 4.2V
VIN=5.0V 40 20 0 6.0V 8.0V
0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
16
XC9503 Series
(2) Efficiency vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=3.3V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
FOSC=300kHz, VOUT1, 2=5.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
100 Efficiency1, 2 EFFI1, 2 (%) 80 60 40 20 0 0.1
100 Efficiency1, 2 EFFI1, 2 (%) 80 60 40 20 0
10.0V
10.0V 8.0V VIN=6.0V
8.0V 6.0V VIN=4.2V 5.0V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=1.0V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
FOSC=180kHz, VOUT1, 2=1.0V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
100 Efficiency1, 2 EFFI1, 2 (%) 80 60 40 20 0
100 Efficiency1, 2 EFFI1, 2 (%) 80 60
VIN=5.0V 8.0V
4.2V 3.3V VIN=2.7V
6.0V 40 10V 20
PWM/PFM Switching Control PWM Control
0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=3.3V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOSC=180kHz, VOUT1, 2=5.0V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
100 Efficiency1, 2 EFFI1, 2 (%) 80 60
100 Efficiency1, 2 EFFI1, 2 (%) 80 60 40 20
5.0V VIN=4.2V 10V 8.0V 40 20
PWM/PFM Switching Control PWM Control
10V 8.0V VIN=6.0V
6.0V
PWM/PFM Switching Control PWM Control
0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
17
XC9503 Series
(2) Efficiency vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=500kHz, VOUT1, 2=1.0V
100 Efficiency1, 2 EFFI1, 2 (%) 80 60 40 3.3V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=2.7V 4.2V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
FOSC=500kHz, VOUT1, 2=1.0V
100 Efficiency1, 2 EFFI1, 2 (%) 80 VIN=5.0V 60 40 8.0V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 6.0V 10V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
PWM/PFM Switching Control PWM Control
FOSC=500kHz, VOUT1, 2=3.3V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
FOSC=500kHz, VOUT1, 2=3.3V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control PWM Control
100 Efficiency1, 2 EFFI1, 2 (%) 80 60
100 Efficiency1, 2 EFFI1, 2 (%) 80 60
10.0V 8.0V 6.0V
10.0V 40 20 0 8.0V VIN=6.0V
40 20 0 0.1 1 10
5.0V VIN=4.2V
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM)
18
XC9503 Series
(3) Ripple Voltage vs. Output Current
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=1.0V
100 Ripple Voltage1, 2 (mV) 80 60 VIN=2.7V 3.3V 5.0V 6.0V 40 8.0V 10V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 4.2V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=1.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=2.7V 8.0V 3.3V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
6.0V 5.0V 10V 4.2V
FOSC=300kHz, VOUT1, 2=1.8V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=1.8V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0
VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
5.0V 4.2V 10V 8.0V 6.0V 3.3V VIN=2.7V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=2.5V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=2.5V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0
VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
VIN=2.7V 10V 8.0V 6.0V 5.0V 4.2V 3.3V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM) 19
XC9503 Series
(3) Ripple Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=300kHz, VOUT1, 2=3.3V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=3.3V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0
VIN=4.2V 5.0V 6.0V 8.0V 10V
VIN=4.2V 5.0V 6.0V
8.0V
10.0V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=5.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=300kHz, VOUT1, 2=5.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 VIN=6.0V 20 0 8.0V 10.0V
L=22H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60
VIN=6.0V 40 10V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 8.0V
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=1.0V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=180kHz, VOUT1, 2=1.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 VIN=2.7V
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1
VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
4.2V 10V 5.0V 6.0V
8.0V 3.3V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM) 20
XC9503 Series
(3) Ripple Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=180kHz, VOUT1, 2=3.3V
100
PWM Control
FOSC=180kHz, VOUT1, 2=3.3V
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
Ripple Voltage1, 2 (mV)
80 60 40 8.0V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 5.0V VIN=4.2V 6.0V 10V
VIN=4.2V 5.0V
6.0V
8.0V
10V
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=5.0V
100
PWM Control
FOSC=180kHz, VOUT1, 2=5.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 VIN=6.0V 20 0
L=47H(CDRH6D28), CL=94F(Tantaium) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
L=47H(CDRH6D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
Ripple Voltage1, 2 (mV)
80 60 40 8.0V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) VIN=6.0V
10V
8.0V
10V
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=500kHz, VOUT1, 2=1.0V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=500kHz, VOUT1, 2=1.0V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1
100 Ripple Voltage1, 2 (mV) 80 60
VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V
VIN=2.7V 40 8.0V 10V 5.0V 6.0V 20 0 4.2V 3.3V
1
10
100
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94F (Tantalum) + 100F (OS-COM) 21
XC9503 Series
(3) Ripple Voltage vs. Output Current (continued)
2ch. Step-down DC/DC Controller ICs
FOSC=500kHz, VOUT1, 2=3.3V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=500kHz, VOUT1, 2=3.3V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
100 Ripple Voltage1, 2 (mV) 80 60
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0
8.0V 10V 40 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 5.0V VIN=4.2V 6.0V
VIN=4.2V 5.0V
6.0V
8.0V
10V
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=500kHz, VOUT1, 2=5.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 8.0V VIN=6.0V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM Control
FOSC=500kHz, VOUT1, 2=5.0V
100 Ripple Voltage1, 2 (mV) 80 60 40 VIN=6.0V 20 0 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 8.0V
L=10H(CDRH5D28), CL=94F(Tantalum) SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
10V
10V
22
XC9503 Series
(4) Supply Current 1 vs. Supply Voltage
2ch. Step-down DC/DC Controller ICs
(5) Supply Current 1_1 vs. Supply Voltage
XC9503B092 (180KHz)
250 Supply Current 1 IDD1 (A) 200 150 100 50 0 0 2 4 6 8 10 Supply Voltage VDD (V) 250 Suppy Current 1-1 IDD1-1 (A) 200 150 100 50 0 0
XC9503B092 (180KHz)
Topr=85OC 25OC - 40OC
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
(6) Supply Current 1_2 vs. Supply Voltage
(7) Supply Current 2 vs. Supply Voltage
XC9503B092 (180KHz)
Supply Current 1-2 IDD1-2 (A) 250 200 150 100 50 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=85OC Topr=85OC 25OC 25OC - 40OC 40OC 250 Supply Current 2 IDD2 (A) 200 150 100 50 0 0
XC9503B092 (180KHz)
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
(8) Stand-by Current vs. Supply Voltage
(9) Oscillation Frequency vs. Supply Voltage
XC9503B092 (180KHz)
Oscillaltion Frequency Fosc (kHz) 10 Stand-by Curret ISTB (A) 8 6 4 2 0 0 2 4 6 8 10 Suppy Voltage VDD (V) 360
XC9503B093(180kHz)
Topr=85OC 25OC - 40OC
330
300
270
240 0 2 4 6 8 10 Supply Voltage VDD (V)
23
XC9503 Series
(10) EN1, 2 'High' 'Low' Voltage vs. Supply Voltage
2ch. Step-down DC/DC Controller ICs
(11) PWM1, 2 'High' 'Low' Voltage vs. Supply Voltage
XC9503B093 (300KHz)
EN1, 2 'H' 'L' Voltage VEN1, 2(V)
PWM1, 2 'H' 'L' Voltage VPWM1, 2 (V)
XC9503B093 (300KHz)
0.8
0.8
0.6 - 40OC 0.4 85OC 0.2 Topr=25OC
0.6 - 40OC 0.4 85OC Topr=25 C 0.2
O
0 0 2 4 6 8 10 Supply Voltage VDD (V)
0 0 2 4 6 8 10 Supply Voltage VDD (V)
(12) PFM duty ratio 1, 2 vs. Supply Voltage
(13) Output Voltage vs. Ambient Temperature
XC9503B093(300kHz)
40 PFM duty ratio 1, 2 (%) Topr=85OC 25OC - 40OC 3.5 Output Voltage VOUT1, 2 (V) 3.4 3.3 3.2 3.1 3.0 0 2 4 6 8 10 0
XC9503B093(300kHz)
L=22H(CDRH5D28), CL=94F (Tantalum) SD:CMS02 Tr:XP162A12A6
35
30
25
VIN=5.0V IOUT1, 2 =200mA 2 4 6 8 10
20 Supply Voltage VDD (V)
Supply Voltage VDD (V)
(14) EXT1, 2 'High' On Resistance vs. Supply Voltage
(14) EXT1, 2 'Low' On Resistance vs. Supply Voltage
XC9503B092 (180KHz)
EXT1, 2 'High' On Resistance () EXT1, 2 'Low' ON Resistance () 50 40 30 20 10 0 0 2 4 6 8 10 Supply Voltage VDD (V) 50 40 30 20 10 0 0
XC9503B092 (180KHz)
Topr=85OC 25OC - 40OC
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
24
XC9503 Series
(16) Soft Start Time 1, 2 vs. Supply Voltage
2ch. Step-down DC/DC Controller ICs
XC9503B092 (180KHz)
Soft Start Time 1, 2 TSS1, 2 (msec)
25 20 15 10 5 0 0 2 4 6 8 10 Supply Voltage VDD (V)
25
XC9503 Series
! Load Transient Response
< VOUT1, 2 = 3.3 V, VIN = 5.0V " PWM Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100A " 300mA
2ch. Step-down DC/DC Controller ICs
IOUT1, 2 = 100A ! 300mA >
FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 100A
CH1
3.3V CH1
3.3V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div
100A
CH2 10msec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div
100A
" PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100A " 300mA FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 100A
CH1
3.3V CH1 3.3V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div
100A
CH2 10msec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div
100A
26
XC9503 Series
! Load Transient Response
< VOUT1, 2 = 3.3 V, VIN = 5.0V " PWM Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 10mA " 300mA
2ch. Step-down DC/DC Controller ICs
IOUT1, 2 = 10mA ! 300mA >
FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 10mA
CH1
3.3V CH1
3.3V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div
10mA
CH2 400sec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div
10mA
" PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 10mA " 300mA FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 10mA
CH1
3.3V
CH1
3.3V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div
10mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div
10mA
27
XC9503 Series
! Load Transient Response
< VOUT1, 2 = 0.9 V, VIN = 3.3V " PWM Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 100A " 300mA
2ch. Step-down DC/DC Controller ICs
IOUT1, 2 = 100A ! 300mA >
FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 100A
CH1
0.9V CH1 0.9V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
100A
CH2 4msec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
100A
" PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 100A " 300mA FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 100A
CH1
0.9V CH1 0.9V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
100A
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div
100A
28
XC9503 Series
! Load Transient Response
< VOUT1, 2 = 0.9 V, VIN = 3.3V " PWM Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 10mA " 300mA
2ch. Step-down DC/DC Controller ICs
IOUT1, 2 = 10mA ! 300mA >
FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 10mA
CH1
0.9V CH1 0.9V
300mA
300mA
CH2 100sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
10mA
CH2 100sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
10mA
" PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 10mA " 300mA FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 10mA
CH1
0.9V CH1 0.9V
300mA
300mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
10mA
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div
10mA
29
XC9503 Series
! Load Transient Response
< PWM Control ! PWM / PFM Switching Control >
2ch. Step-down DC/DC Controller ICs
FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 5mA PWM1, 2 'Low' " 'High'
FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 5mA PWM1, 2 'HIgh' " 'Low'
CH1
3.3V
CH1
3.3V
0.65V
0.65V
CH2 400sec / div CH1 : VOUT1, 2, AC-COUPLED, 10mV/div CH2 : IOUT1, 2, 0.5V/div
0V
CH2 200sec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 0.5V/div
0V
< Soft Start Wave Form > FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA EN1, 2 'Low' " 'High' CIN=47F FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100mA EN1, 2 'Low' " 'High' CIN=47F
3.3V CH1 200mA CH2 0.65V CH3 4msec / div CH1 : VOUT1, 2, 2.0V/div CH2 : IIN1, 2, 100mA/div CH3 : EN1, 2, 0.5V/div CH3 4msec / div CH1 : VOUT1, 2, 2.0V/div CH2 : IIN1, 2, 50mA/div CH3 : EN1, 2, 0.5V/div * CH1 : EN2=GND when measurement CH2 : EN1=GND when measurement CH2 CH1
3.3V
75mA
0.65V
30

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