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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-27201-3E
ASSP
For Power Supply Applications
Switching Regulator Controller
MB3776A
s DESCRIPTION
MB3776A is a PWM system switching regulator controller. Because of its low operating supply voltage and powerdown, the MB3776A is ideal for use in DC/DC converters for battery-powered portable equipment.
s FEATURES
* * * * * * Wide supply voltage range: (2 V to 15 V) Wide oscillation frequency range, high-frequency oscillation: (10 kHz to 500 kHz) Push-pull output. Drive current set with external resistor Bulit-in idle period circuit Internally set error amplifier gain, few external components Bulit-in power-down function
s PACKAGES
8-pin Plastic DIP 8-pin Plastic SOP 8-pin Plastic SOL 8-pin Plastic SSOP
(DIP-8P-M01)
(FPT-8P-M01)
(FPT-8P-M02)
(FPT-8P-M03)
MB3776A
s PIN ASSIGNMENT
(TOP VIEW)
-IN
1
8
FB
CLT
2
7
OSC
V CC
3
6
GND
IB
4
5
OUT
(DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) (FPT-8P-M03)
2
MB3776A
s BLOCK DIAGRAM
VCC 3
OSC 7 IS 0.6 V IB
CTL
2
Reference voltage 1.25 V Internal bias & reference voltage Error Amp. 0.1 V
Saw-tooth waveform 0.1 V P. W. M. Comp
Is
30 k 5 OUT
-IN
1
-
X 100
36 k
-
+
470 0.5 V
+ +
Output drive control
4
IB
D. T. C. ( 0.6 V)
FB
8 6 GND
3
MB3776A
s ABSOLUTE MAXIMUM RATINGS
(Ta = +25C) Parameter Power supply voltage Error amp. input voltage Output source current Output sink current Symbol VCC VI ISOURCE ISINK Condition -- -- -- -- Ta +25C (DIP) Power dissipation PD Ta +25C (SOP) EIAJ JEDEC Rating Min. -- -0.3 -- -- -- -- -- -- -30 -55 Max. 16 +10 -50 50 550 *570 *430 *580 +75 +125 Unit V V mA mA mW mW mW mW C C
Ta < +25C (SSOP) Operating temperature Storage temperature Top Tstg -- --
* : The packages are mounted on the epoxy board (10 cm x 10 cm x 1.5 mm) WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
s RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage Error amp. input voltage Output source current Output sink current Phase compensation capacitor Timing capacitor Timing resistor Oscillator frequency Operating temperature Symbol VCC VI ISOURCE ISINK CP CT RT fOSC TOP Value Min. 2.0 -0.2 -40 -- -- 100 1.0 10 -30 Typ. -- -- -- -- 0.1 1000 3.0 200 25 Max. 15 1.0 -- 40 -- 10000 5.0 500 75 Unit V V mA mA F pF k kHz C
WARNING: Recommended operating conditions are normal operating ranges for the semiconductor device. All the device's electrical characteristics are warranted when operated within these ranges. Always use semiconductor devices within the recommended operating conditions. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representative beforehand.
4
MB3776A
s ELECTRICAL CHARACTERISTICS
1. Reference Section and Error Amp. Section
(Ta = +25C, VCC = 3 V) Parameter Input threshold voltage VT input stability VT temp. stability Input bias current Voltage gain Frequency band width Symbol VT VTdV1 VTdV2 VTdT IB AV BW AV = 0 dB Condition Min. VFB = 450 mV VCC = 2.0 V to 6.0 V VCC = 6.0 V to 15 V Ta = -30C to +75C VIN = 0 V to 0.6 V -- 487 -5 -5 -3 -1.0 70 -- Value Typ. Max. 507 -- -- -- -0.2 100 6 527 5 5 3 1.0 145 -- Unit mV mV mV % A V/V MHz
2. Saw-tooth Waveform Oscillator Section
(Ta = +25C, VCC = 3 V) Parameter Oscillator frequency Frequency input stability Frequency temp. stability Symbol fOSC fdV fdT Condition RT = 3.0 k CT = 1000 pF VCC = 2.0 V to 15 V Ta = -30C to +75C Value Min. 160 -- -- Typ. Max. 200 2 10 240 -- -- Unit kHz % %
3. Under Lockout Protection
(Ta = +25C, VCC = 3 V) Parameter Threshold voltage Symbol VTH Condition -- Value Min. -- Typ. Max. 1.4 -- Unit V
4. Dead-time Control Section
(Ta = +25C, VCC = 3 V) Parameter Symbol Condition CT = 1000 pF RT = 3.0k VFB = 0.9 V Value Min. 60 Typ. Max. 70 85 Unit
Max. duty cycle
tDUTY
%
5
MB3776A
5. Output Section
(Ta = +25C, VCC = 3 V) Parameter Output source current Output sink current High-level output voltage Output voltage Symbol ISOURCE ISINK VOH VOL Condition RB = 820 , VO = 1 V RB = 820 , VO = 0.3 V RB = 820 , VO = 7 V IO = -15 mA VCTL = VCC, IO = 3 A Value Min. -40 30 5.5 -- Typ. Max. -30 60 6.0 0.1 -20 -- -- 0.2 Unit mA mA V V
6. Control Section
(Ta = +25C, VCC = 3 V) Parameter Input off condition Input on condition Control terminal current Symbol IOFF ION ICTL Condition -- -- VCC = 7 V, VCTL = 0 V Value Min. -300 -- -1.3 Typ. Max. -- -- -1 -- -700 -- Unit A A mA
7. All Device
(Ta = +25C, VCC = 3 V) Parameter Stand by current Average supply current Symbol ICCS ICC Condition VCTL = VCC or CTL terminal open ICTL = -700 A RB = 820 Value Min. -- -- Typ. Max. -- 4.5 0.5 8 Unit A mA
6
MB3776A
s MEASURMENT CIRCUIT
CP MB3776A TEST INPUT CTL VCC = 3 V 1 2 3 4 8 7 6 5 ISOURCE RB CT RT
OUTPUT
CT = 1000 pF CP = 0.1 F RT = 3 k RB =820 ISOURCE 25000/RB (mA)
7
MB3776A
s DIAGRAM
FB Terminal Waveform Saw-tooth Waveform Output 0V
Output Terminal Waveform
0 mA CTL Input Current ICTL
Power Supply Voltage
VCC 0V
8
MB3776A
s TYPICAL CHARACTERISTIC
Output bias current vs. Output source current
-50 VCC = 2 V Ta = +25C -40 -30
Output bias current vs. Output bias voltage
1.0 VCC = 2 V Ta = +25C 0.8 0.6
Output source current ISOURCE (mA)
Output bias voltage VB (V)
-20 -10 0 0 -100 -200 -300 -400 -500 -600 -700 Output bias current IB ()
0.4
0.2 0 0 -100 -200 -300 -400 -500 -600 -700 Output bias current IB ()
"L" Level output
200 2.0 VCC = 2 V RB = 820 Ta = +25C
"H" Level output
VCC = 2 V RB = 820 Ta = +25C
"L" Level output voltage VO (mV)
100
"H" Level output voltage VO (V)
1.0
0 0 2 4 6 8 10 12 14 16 18 20 "L" Level output current IO (mA)
0.0 0 -6 -12 -18 -24 -30 "H" Level output current IO (mA)
Ambient temp. vs. Oscillator frequency
210 200 190 180 170 160 150 -30 -20 VCC = 2 V RB = 820 CT = 1000 pF RT = 3 k
Timing resistor vs. Oscillator frequency
2M 1M VCC = 3 V RB = 820 Ta = +25C
Oscillator frequency fOSC (kHz)
500 k
Oscillator frequency fOSC (Hz)
100 k 50 k CT = 1000 pF 10 k 5k CT = 10000 pF
CT = 100 pF
0
20
40
60
75
Ambient temp. Ta (C)
1k 1k
5 k 10 k
50 k 100 k
500 k
Timing resistor RT ()
(Continued)
9
MB3776A
(Continued)
Control terminal voltage vs. Control terminal current
-1.0 VCC = 2 V Ta = +25C -1.0 Control terminal current ICTL (mA) VCC = 7 V Ta = +25C
Control terminal voltage vs. Control terminal current
Control terminal current ICTL (mA)
-0.5
-0.5
0 0.0 0.4 0.8 1.2 1.6 Control terminal voltage VCTL (V) 2.0
0 0 2 4 6 8 Control terminal voltage VCTL (V) 10
Power supply voltage vs. Input on voltage
10 Ta = +25C 8 Inpurt on current VCTL (V)
6
4
2
0 0 2 4 6 8 10 Power supply voltage VCC (V)
10
MB3776A
s APPLICATION EXAMPLE
18 k 10 H VIN (+3 V) 4.7 F + - 1 2 3 2 k 4 820 5 8 + CTL 7 3 k 6 1000 pF 0.1 F 10 H 10 F - + - 10 F VO- (-5 V) + 10 F - + - 10 H VO+ (+5 V) 10 F
Synchronization
To synchronize MB3776A controllers, the OSC terminal of each IC is shared and the same specified capacitor and resistor used on a signal IC application is connected for self-excitation oscillation. The CTL terminal controls power on/off of each IC.
OUT 1 CT RT MB3776A
OUT 2 MB3776A
MB3776A
OUT 3
VCC
11
MB3776A
s ORDERING INFORMATION
Part number MB3776A-P MB3776APF MB3776APNF MB3776APFV Package 8-pin Plastic DIP (DIP-8P-M01) 8-pin Plastic SOP (FPT-8P-M01) 8-pin Plastic SOL (FPT-8P-M02) 8-pin Plastic SSOP (FPT-8P-M03) Remarks
12
MB3776A
s PACKAGE DIMENSIONS
8-pin Plastic DIP (DIP-8P-M01)
9.40 -0.30
+0.40 +.016
.370 -.012
1 PIN INDEX
6.200.25 (.244.010)
4.36(.172)MAX
0.51(.020)MIN 0.250.05 (.010.002)
3.00(.118)MIN
0.460.08 (.018.003)
+0.30 +.012
0.99 -0
+0.30 +.012
1.52 -0
.039 -0 +0.35 0.89 -0.30
.035 -.012
+.014
.060 -0 2.54(.100) TYP
7.62(.300) TYP
15MAX
C
1994 FUJITSU LIMITED D08006S-2C-3
Dimensions in mm (inches).
(Continued)
13
MB3776A
(Continued)
8-pin Plastic SOP (FPT-8P-M01)
2.25(.089)MAX 6.35 -0.20 .250 -.008
+0.25 +.010
0.05(.002)MIN (STAND OFF)
INDEX
5.300.30 (.209.012)
7.800.40 (.307.016)
6.80 -0.20 +.016 .268 -.008
+0.40
1.27(.050) TYP 3.81(.150)REF
0.450.10 (.018.004)
O0.13(.005)
M
0.15 -0.02 +.002 .006 -.001
+0.05
0.500.20 (.020.008)
Details of "A" part 0.20(.008)
0.50(.020) "A" 0.10(.004) 0.18(.007)MAX 0.68(.027)MAX
C
1994 FUJITSU LIMITED F08002S-4C-4
Dimensions in mm (inches).
(Continued)
14
MB3776A
(Continued)
8-pin Plastic SOL (FPT-8P-M02)
5.05 -0.20 .199 -.008
+0.25
+.010
1.550.20(.061.008)
0.150.10 (STAND OFF) (.006.004) 3.900.30 (.154.012) 6.000.40 (.236.016) 45 5.000.30 (.197.012)
0.40(.016) 1.27(.050)TYP 0.420.10 (.017.004) O0.13(.005)
M
0.200.05 (.008.002) Details of "A" part
0.50.020 (.020.008)
0.40(.016)
"A" 3.81(.150)REF
0.10(.004)
0.20(.008) 0.18(.007)MAX 0.65(.026)MAX
C
1994 FUJITSU LIMITED F08004S-2C-4
Dimensions in mm (inches).
(Continued)
15
MB3776A
(Continued)
8-pin Plastic SSOP (FPT-8P-M03)
* : This dimension does not include resin protrusion.
* 3.500.10
(.138.004)
1.25 -0.10 +.008 .049 -.004
+0.20
0.10(.004)
INDEX
4.200.10 (.165.004)
5.20(.205) NOM
6.200.20 (.244.008)
"A"
0.80(.0315) TYP
0.350.10 (.014.004)
0.10(.004)
M
0.15 -0.02 +.002 .006 -.001
+0.05
Details of "A" part 0.100.10(.004.004) (STAND OFF)
2.40(.094)REF
0
10
0.500.20 (.020.008)
C
1994 FUJITSU LIMITED F08005S-1C-2
Dimensions in mm (inches).
16
MB3776A
FUJITSU LIMITED
For further information please contact:
Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka Nakahara-ku, Kawasaki-shi Kanagawa 211-8588, Japan Tel: (044) 754-3763 Fax: (044) 754-3329
All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information and circuit diagrams in this document presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. Also, FUJITSU is unable to assume responsibility for infringement of any patent rights or other rights of third parties arising from the use of this information or circuit diagrams. FUJITSU semiconductor devices are intended for use in standard applications (computers, office automation and other office equipment, industrial, communications, and measurement equipment, personal or household devices, etc.). CAUTION: Customers considering the use of our products in special applications where failure or abnormal operation may directly affect human lives or cause physical injury or property damage, or where extremely high levels of reliability are demanded (such as aerospace systems, atomic energy controls, sea floor repeaters, vehicle operating controls, medical devices for life support, etc.) are requested to consult with FUJITSU sales representatives before such use. The company will not be responsible for damages arising from such use without prior approval. Any semiconductor devices have inherently a certain rate of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Control Law of Japan, the prior authorization by Japanese government should be required for export of those products from Japan.
http://www.fujitsu.co.jp/
North and South America FUJITSU MICROELECTRONICS, INC. Semiconductor Division 3545 North First Street San Jose, CA 95134-1804, USA Tel: (408) 922-9000 Fax: (408) 922-9179 Customer Response Center Mon. - Fri.: 7 am - 5 pm (PST) Tel: (800) 866-8608 Fax: (408) 922-9179
http://www.fujitsumicro.com/
Europe FUJITSU MIKROELEKTRONIK GmbH Am Siebenstein 6-10 D-63303 Dreieich-Buchschlag Germany Tel: (06103) 690-0 Fax: (06103) 690-122
http://www.fujitsu-ede.com/
Asia Pacific FUJITSU MICROELECTRONICS ASIA PTE LTD #05-08, 151 Lorong Chuan New Tech Park Singapore 556741 Tel: (65) 281-0770 Fax: (65) 281-0220
http://www.fmap.com.sg/
F9802 (c) FUJITSU LIMITED Printed in Japan
20

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