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TK112xxB
VOLTAGE REGULATOR WITH ON/OFF SWITCH FEATURES
High Voltage Precision at 2.0% Active High On/Off Control Very Low Dropout Voltage 80 mV at 30 mA Very Low Noise Very Small SOT-23L or SOT-89 Surface Mount Packages s Internal Thermal Shutdown s Short Circuit Protection s s s s s
APPLICATIONS
s s s s s s s s s Battery Powered Systems Cellular Telephones Pagers Personal Communications Equipment Portable Instrumentation Portable Consumer Equipment Radio Control Systems Toys Low Voltage Systems
DESCRIPTION
The TK112xxB is a low dropout linear regulator with a builtin electronic switch. The internal switch can be controlled by TTL or CMOS logic levels. The device is in the "on" state when the control pin is pulled to a logic high level. An external capacitor can be connected to the noise bypass pin to lower the output noise level to 30 Vrms. An internal PNP pass transistor is used to achieve a low dropout voltage of 80 mV (typ.) at 30 mA load current. The TK112xxB has a very low quiescent current of 170 A at no load and 1 mA with a 30 mA load. The standby current is typically 100 nA. The internal thermal shut down circuitry limits the junction temperature to below 150 C. The load current is internally monitored and the device will shut down in the presence of a short circuit or overcurrent condition at the output. The TK112xxB is available in either a 6-pin SOT-23L or a 5-pin SOT-89 surface mount package. TK112xxB
CONTROL
20 P
VIN GND
GND NOISE BYPASS
SOT-23L
VOUT
NOISE BYPASS
VOUT GND VIN
GND
ORDERING INFORMATION
SOT-89
CONTROL
TK112
Voltage Code Package Code
B
Tape/Reel Code Temp. Code
VIN VOUT
BLOCK DIAGRAM
VOLTAGE CODE
13 = 1.3 V 14 = 1.4 V 15 = 1.5 V 16 = 1.6 V 17 = 1.7 V 18 = 1.8 V 19 = 1.9 V 20 = 2.0 V 21 = 2.1 V 22 = 2.2 V 23 = 2.3 V 24 = 2.4 V 25 = 2.5 V 26 = 2.6 V 27 = 2.7 V 28 = 2.8 V 29 = 2.9 V 30 = 3.0 V 31 = 3.1 V 32 = 3.2 V 33 = 3.3 V 34 = 3.4 V 35 = 3.5 V 36 = 3.6 V 37 = 3.7 V 38 = 3.8 V 39 = 3.9 V 40 = 4.0 V 41 = 4.1 V 42 = 4.2 V 43 = 4.3 V 44 = 4.4 V 45 = 4.5 V 46 = 4.6 V 47 = 4.7 V 48 = 4.8 V 49 = 4.9 V 50 = 5.0 V 55 = 5.5 V 80 = 8.0 V
PACKAGE CODE:
M: SOT-23L U: SOT-89
NOTE 1:
1.3 V to 1.9 V available in SOT-23L package only.
TAPE/REEL CODE
L: Tape Left (SOT-23L) B: Tape Left (SOT-89)
THERMAL PROTECTION
TEMP. CODE:
C: -30 to +80 C I: -40 to +85 C
CONTROL
NOTE 2:
1.3 V to 2.4 V available in C temperature code (-30 to +80 C) only.
BANDGAP REFERENCE GND
NOISE BYPASS
October 1999 TOKO, Inc.
Page 1
TK112xxB
ABSOLUTE MAXIMUM RATINGS TK112xxBC (VOUT 2.0 V)
Supply Voltage ......................................................... 16 V Power Dissipation SOT-23L (Note1) .................. 600 mW Power Dissipation SOT-89 (Note1) .................... 900 mW Reverse Bias ............................................................ 10 V Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ...................-30 to +80 C Operating Voltage Range ............................ 1.8 to 14.5 V Junction Temperature ........................................... 150 C
TK112xxBC ELECTRICAL CHARACTERISTICS (VOUT 2.0 V)
Test conditions: TA = 25 C, unless otherwise specified. SYMBOL IQ ISTBY VOUT Line Reg PARAMETER Quiescent Current Standby Current Output Voltage Line Regulation TEST CONDITIONS IOUT = 0 mA, Excluding ICONT VIN = 8 V, Output OFF IOUT = 30 mA VOUT 5.5 V, (Note 2) VOUT 5.6 V, (Note 2) IOUT = 1 to 60 mA, (Note 2) Load Reg Load Regulation IOUT = 1 to 100 mA, (Note 2) IOUT = 1 to 150 mA, (Note 2) VDROP IOUT IOUT(PULSE) RR Dropout Voltage Continuous Output Current Pulse Output Current Ripple Rejection IOUT = 60 mA, (Note 2) IOUT = 150 mA, (Note 2) (Note 2) 5 ms pulse, 12.5 % duty cycle f = 400 Hz, CL = 10 F, CN = 0.1 F, VIN = VOUT + 1.5 V, IOUT = 30 mA, VRIPPLE = 100 mVrms, (Note 3) 10 Hz f 80 kHz, CL = 10 F, CN = 0.1 F, VCN = VOUT + 1.5 V, IOUT = 60 mA, (Notes 3,4) 60 See Table 1 3.0 15 6 18 23 0.12 0.26 20 40 30 60 90 0.20 0.39 150 180 MIN TYP 170 MAX 250 0.1 UNITS A A V mV mV mV mV mV V V mA mA dB
VNO
Output Noise Voltage Noise Bypass Terminal Voltage Temperature Coefficient
30
Vrms
Vref VOUT /T
1.25 IOUT = 10 mA 40
V ppm/ C
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) Control Current Control Voltage ON Control Voltage OFF VCONT = 1.8 V, Output ON Output ON Output OFF 1.8 0.6 12 35 A V V
Note 1: When mounted as recommended. Derate at 4.8 mW/C for SOT-23L and 6.4 mW/C for SOT-89 packages for operation above 25C. Note 2: Refer to "Definition of Terms." Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used. Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal. Gen. Note: Parameters with min. or max. values are 100% tested at TA = 25 C.
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October 1999 TOKO, Inc.
TK112xxB
ABSOLUTE MAXIMUM RATINGS TK1121xBC (VOUT 1.9 V)
Supply Voltage ......................................................... 16 V Power Dissipation SOT-23L (Note1) .................. 600 mW Power Dissipation SOT-89 (Note1) .................... 900 mW Reverse Bias .............................................................. 7 V Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ................... -30 to +80 C Operating Voltage Range ............................ 1.8 to 14.5 V Junction Temperature ........................................... 150 C
Test conditions: TA = 25 C, unless otherwise specified.
SYMBOL IQ ISTBY VOUT Line Reg PARAMETER Quiescent Current Standby Current Output Voltage Line Regulation
TK1121xBC ELECTRICAL CHARACTERISTICS (VOUT 1.9 V)
TEST CONDITIONS IOUT = 0 mA, Excluding ICONT VIN = 8 V, Output OFF IOUT = 30 mA (Note 2) IOUT = 1 to 60 mA, (Note 2) IOUT = 1 to 100 mA, (Note 2) IOUT IOUT(PULSE) Continuous Output Current 2.4 V VIN 2.6 V, (Note 2) VIN 2.6 V, (Note 2) 5 ms pulse, VIN 2.6 V, 12.5 % duty cycle f = 400 Hz, CL = 10 F, CN = 0.1 F, VIN = VOUT + 1.5 V, IOUT = 30 mA, VRIPPLE = 100 mVrms, (Note 3) 10 Hz f 80 kHz, CL = 10 F, CN = 0.1 F, VCN = VOUT + 1.5 V, IOUT = 60 mA, (Notes 3,4) 55 See Table 2 3.0 6 18 20 30 60 130 150 180 MIN TYP 170 MAX 250 0.1 UNITS A A V mV mV mV mA mA mA
Load Reg Load Regulation
Pulse Output Current
RR
Ripple Rejection
dB
VNO
Output Noise Voltage Noise Bypass Terminal Voltage Temperature Coefficient
30
Vrms
Vref VOUT /T
1.25 IOUT = 10 mA 40
V ppm/ C
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) Control Current Control Voltage ON Control Voltage OFF VCONT = 1.8 V, Output ON Output ON Output OFF 1.8 0.6 12 35 A V V
Note 1: When mounted as recommended. Derate at 4.8 mw/C for SOT-23L and 6.4 mw/C for SOT-89 packages for operation above 25 C. Note 2: Refer to "Definition of Terms." Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used. Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal. Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 C.
October 1999 TOKO, Inc.
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TK112xxB
ABSOLUTE MAXIMUM RATINGS TK112xxBI (VOUT 2.5 V)
Supply Voltage ......................................................... 16 V Power Dissipation SOT-23L (Note1) .................. 600 mW Power Dissipation SOT-89 (Note1) .................... 900 mW Reverse Bias ............................................................ 10 V Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ...................-40 to +85 C Operating Voltage Range ............................ 1.8 to 14.5 V Junction Temperature ........................................... 150 C
TK112xxBI ELECTRICAL CHARACTERISTICS (VOUT 2.5 V)
Test conditions: TA = -40 to 85 C, unless otherwise specified. SYMBOL IQ ISTBY VOUT Line Reg PARAMETER Quiescent Current Standby Current Output Voltage Line Regulation TEST CONDITIONS IOUT = 0 mA, Excluding ICONT VIN = 8 V, Output OFF IOUT = 30 mA VOUT 5.5 V,(Note 2) VOUT 5.6 V,(Note 2) See Table 3 3.0 15 6 18 23 0.12 0.26 25 40 40 80 110 0.23 0.40 150 180 60 MIN TYP 170 MAX 300 0.2 UNITS A A V mV mV mV mV mV V V mA mA dB
IOUT = 1 to 60 mA, (Note 2) Load Reg Load Regulation IOUT = 1 to 100 mA, (Note 2) IOUT = 1 to 150 mA, (Note 2) VDROP IOUT IOUT(PULSE) RR Dropout Voltage Continuous Output Current Pulse Output Current Ripple Rejection IOUT = 60 mA, (Note 2) IOUT = 150 mA, (Note 2) (Note 2) 5 ms pulse, 12.5 % duty cycle f = 400 Hz, CL = 10 F, CN = 0.1 F, VIN = VOUT + 1.5 V, IOUT = 30 mA, VRIPPLE = 100 mVrms, (Note 3) 10 Hz f 80 kHz, CL = 10 F, CN = 0.1 F, VCN = VOUT + 1.5 V, IOUT = 60 mA, (Notes 3,4)
VNO
Output Noise Voltage Noise Bypass Terminal Voltage Temperature Coefficient
30
Vrms
Vref VOUT /T
1.25 IOUT = 10 mA 40
V ppm/ C
CONTROL TERMINAL SPECIFICATIONS ICONT VCONT(ON) VCONT(OFF) Control Current Control Voltage ON Control Voltage OFF VCONT = 1.8 V, Output ON Output ON Output OFF 2.0 0.5 12 40 A V V
Note 1: When mounted as recommended. Derate at 4.8 mw/C for SOT-23L and 6.4 mw/C for SOT-89 packages for operation above 25 C. Note 2: Refer to "Definition of Terms." Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used. Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal. Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 C. Gen Note: For Line Regulation, typ. and max. is changed to VOUT > 5.6 V.
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October 1999 TOKO, Inc.
TK112xxB
TK112xxBMC ELECTRICAL CHARACTERISTICS TABLE 1
Test conditions: TA = 25 C, IOUT = 30 mA, unless otherwise specified.
Output Voltage 1.3 V 1.4 V 1.5 V 1.6 V 1.7 V 1.8 V 1.9 V Voltage Code 13 14 15 16 17 18 19 VOUT(MIN) 1.240 V 1.340 V 1.440 V 1.540 V 1.640 V 1.740 V 1.804 V VOUT(MAX) 1.36 V 1.46 V 1.560 V 1.660 V 1.760 V 1.860 V 1.960 V Test Voltage 2.4 V 2.4 V 2.4 V 2.4 V 2.4 V 2.4 V 2.4 V
TK112xxBC ELECTRICAL CHARACTERISTICS TABLE 2
Test conditions: TA = 25 C, IOUT = 30 mA, unless otherwise specified.
Output Voltage 2.0 V 2.1 V 2.2 V 2.3 V 2.4 V 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V Voltage Code 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 VOUT(MIN) 1.940 V 2.040 V 2.140 V 2.240 V 2.340 V 2.440 V 2.540 V 2.640 V 2.740 V 2.840 V 2.940 V 3.040 V 3.140 V 3.240 V 3.335 V 3.435 V 3.535 V VOUT(MAX) 2.060 V 2.160 V 2.260 V 2.360 V 2.460 V 2.560 V 2.660 V 2.760 V 2.860 V 2.960 V 3.060 V 3.160 V 3.260 V 3.360 V 3.465 V 3.565 V 3.665 V Test Voltage 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V Output Voltage 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V 5.5 V 8.0 V Voltage Code 37 38 39 40 41 42 43 44 45 46 47 48 49 50 55 80 VOUT(MIN) 3.630 V 3.725 V 3.825 V 3.920 V 4.020 V 4.120 V 4.215 V 4.315 V 4.410 V 4.510 V 4.605 V 4.705 V 4.800 V 4.900 V 5.390 V 7.840 V VOUT(MAX) 3.770 V 3.875 V 3.975 V 4.080 V 4.180 V 4.280 V 4.385 V 4.485 V 4.590 V 4.690 V 4.795 V 4.895 V 5.000 V 5.100 V 5.610 V 8.160 V Test Voltage 4.7 V 4.8 V 4.9 V 5.0 V 5.1 V 5.2 V 5.3 V 5.4 V 5.5 V 5.6 V 5.7 V 5.8 V 5.9 V 6.0 V 6.5 V 9.0 V
October 1999 TOKO, Inc.
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TK112xxB
TK112xxBI ELECTRICAL CHARACTERISTICS TABLE 3
Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 30 mA, unless otherwise specified.
Output Voltage 2.5 V 2.6 V 2.7 V 2.8 V 2.9 V 3.0 V 3.1 V 3.2 V 3.3 V 3.4 V 3.5 V 3.6 V 3.7 V 3.8 V 3.9 V 4.0 V 4.1 V 4.2 V 4.3 V 4.4 V 4.5 V 4.6 V 4.7 V 4.8 V 4.9 V 5.0 V 5.5 V 8.0 V Voltage Code 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 55 80 Room Temp. Range (TA = 25 C) VOUT(MAX) VOUT(MIN) 2.440 V 2.540 V 2.640 V 2.750 V 2.840 V 2.940 V 3.040 V 3.140 V 3.240 V 3.335 V 3.435 V 3.535 V 3.630 V 3.725 V 3.825 V 3.920 V 4.020 V 4.120 V 4.215 V 4.315 V 4.410 V 4.510 V 4.605 V 4.705 V 4.800 V 4.900 V 5.390 V 7.840 V 2.560 V 2.660 V 2.760 V 2.860 V 2.960 V 3.060 V 3.160 V 3.260 V 3.360 V 3.465 V 3.565 V 3.665 V 3.770 V 3.875 V 3.975 V 4.080 V 4.180 V 4.280 V 4.385 V 4.485 V 4.590 V 4.690 V 4.795 V 4.895 V 5.000 V 5.100 V 5.610 V 8.160 V Full Temp. Range (TA = -40 to +85 C) VOUT(MIN) VOUT(MAX) 2.400 V 2.500 V 2.600 V 2.700 V 2.800 V 2.900 V 3.000 V 3.095 V 3.190 V 3.290 V 3.385 V 3.485 V 3.580 V 3.675 V 3.770 V 3.870 V 3.965 V 4.060 V 4.160 V 4.255 V 4.350 V 4.450 V 4.545 V 4.640 V 4.740 V 4.835 V 5.320 V 7.745 V 2.600 V 2.700 V 2.800 V 2.900 V 3.000 V 3.100 V 3.200 V 3.305 V 3.410 V 3.510 V 3.615 V 3.720 V 3.820 V 3.925 V 4.030 V 4.130 V 4.235 V 4.335 V 4.440 V 4.545 V 4.645 V 4.750 V 4.850 V 4.955 V 5.060 V 5.165 V 5.680 V 8.265 V
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October 1999 TOKO, Inc.
TK112xxB
TEST CIRCUITS
SOT-23L
IIN VIN + + 1 F VIN VOUT 2.2 F IOUT VOUT VOUT
SOT-89
IIN IOUT + VOUT
VIN
+ 1.0 F
+ VIN
2.2 F
CONT VCONT +
NOISE BYPASS CN 0.1 F
TRANSIENT RESPONSE
VIN RS CONT 1 F CN 0.1 F CL = 10 F to 0.22 F 112XXB V OUT
NOISE BYPASS CN 0.1 F
CONT
ICONT
+ ICONT VCONT 1
Note: Connect pin 5 to ground for heat sink
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 C, unless otherwise specified.
LOAD REGULATION 5 VOUT(TYP)
OUTPUT VOLTAGE RESPONSE (OFFON) CL = 2.2 F
VCONT
SHORT CIRCUIT CURRENT
VOUT (5 mV/DIV)
CN = 0.01 F
4
VOUT (V)
3 2 1 0
VOUT
CN = 0.1 F ILOAD = 30 mA 0 200 400 TIME (s) 600 800
0 50 IOUT (mA) 100
0
150 IOUT (mA)
300
OUTPUT VOLTAGE VS. INPUT VOLTAGE VOUT(TYP)
LINE REGULATION VOUT(TYP) 0 -100
DROPOUT VOLTAGE VS. OUTPUT CURRENT
VOUT (25 mV/DIV)
IOUT = 0 mA
VOUT (50 mV/DIV)
VDROP (mV)
IOUT = 30 mA IOUT = 50 mA IOUT = 90 mA
-200 -300 -400
0
VIN = VOUT VIN (V) (50 mV/DIV)
0
10 VIN (V)
20
0
100 IOUT (mA)
200
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TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
REVERSE BIAS CURRENT (VIN = 0 V) 500 400
100
GROUND CURRENT VS. OUTPUT CURRENT 10 8 IGND (mA)
QUIESCENT CURRENT (OFF MODE) VS. INPUT VOLTAGE
IREV (A)
6 4 2 0
300 200 100 0 VOUT = 1.3 V
UPPER
2.0 V
IQ (pA)
1.9 V
50
0
100 IOUT (mA)
QUIESCENT CURRENT (ON MODE) VS. INPUT VOLTAGE
200
0
10 VREV (V)
20
0
0
10 VIN (V)
20
QUIESCENT CURRENT (ON MODE) vs. INPUT VOLTAGE 1.0 IOUT = 0 mA VOUT
2
GROUND CURRENT
2
IOUT = 0 mA
IQ (mA)
VOUT = 1 3V 2V 5V 4V
VOUT = 1.9 V 0.5
IGND (mA)
IOUT = 60 mA 1
IQ (mA)
0 0
VOUT = 1.3 to 1.8 V 5 VIN (V) 10
0 0
VOUT = 1.3 to 1.8 V
0
IOUT = 30 mA
2.5 VIN (V)
5
-50
0 TA (C)
50
100
DROPOUT VOLTAGE 500 400
CONTROL CURRENT 50 40
ICONT (A)
VCONT (VOUT, ON POINT) 2.0 RCONT = 0
VDROP (mV)
VCONT = 5 V VCONT (V) VCONT = 1.8 V 0 TA (C) 50 100
300 200 100
IOUT = 150 mA
30 20 10
1.0
IOUT = 60 mA
IOUT = 30 mA 0 -50 0 TA (C) 50 100
0 -50
0 -50
0 TA (C)
50
100
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October 1999 TOKO, Inc.
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
MAXIMUM OUTPUT CURRENT
UPPER
OUTPUT VOLTAGE VARIATION
LINE VOLTAGE STEP RESPONSE VOUT +2 V
VOUT (10 mV/DIV) VIN
VOUT = 2.7 V 280 VOUT = 2 to 2.6 V VOUT (mV)
IOUT (mA)
VOUT +1 V
10 VOUT = 2 V 0 -10 3 V 5V -20 4V
270 260
UNDER
240 -50 0
VOUT = 1.3 V 50 TA (C) 100
VOUT
250
VOUT = 1.9 V
VOUT
CN = 0.001 F, CL = .22 F
CN = 0.01 F, CL = 2.2 F -30 -50 0 TA (C) 50 100 TIME (50 s/DIV)
LOAD CURRENT STEP RESPONSE
NOISE SPECTRUM 0
NOISE LEVEL 250 200
NOISE (V)
VS.
CN
100 mA
VOUT = 3 V IOUT = 60 mA CL = 2.2 F
VOUT (50 mV/DIV)
VOUT IOUT
50 mA
CN = 0.01 F, CL = 2.2 F
dB
-50 CL = 3.3 F, CN = NONE CL = 3.3 F, CN = 0.1 F -100 0
SPECTRUM ANALYZER BACKGROUND NOISE
150
CL = 3.3F
100 CL = 10 F 50 0
VOUT
CN = 0.1 F, CL = 10 F TIME (50 s/DIV)
500 k f (Hz)
1M
1 PF
10
100
1000 .01 F CN
.1
RIPPLE REJECTION 0 I OUT = 30 mA -20
RR (dB)
-40 CN = 0.1 F -60 -80 -100 0.01 0.1 1
CN = 0.01 F
10
100
f (kHz)
October 1999 TOKO, Inc.
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TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE vs. OUTPUT CURRENT
TK11213B
OUTPUT VOLTAGE vs. INPUT VOLTAGE
1.3
VOUT (V)
IOUT = 0 mA 30 mA 60 mA
1.3
VOUT (V)
1.9 V 2.1 V VIN = 1.8 V
1.2
150 mA 90 mA
1.2
2.4 V 2.0 V
1.1 1.6 1.7
120 mA
1.1
1.8
1.9
2.0
2.1
0
100
200
300
VIN (V)
IOUT (mA)
TK11214B
OUTPUT VOLTAGE vs. INPUT VOLTAGE
OUTPUT VOLTAGE vs. OUTPUT CURRENT
1.4
VOUT (V)
IOUT = 0 mA 30 mA
1.4
VOUT (V)
60 mA
1.9 V 2.1 V VIN = 1.8 V
1.3
150 mA 90 mA
1.3
2.4 V
1.2 1.6 1.7
120 mA
2.0 V
1.2
1.8
1.9
2.0
2.1
0
100
200
300
VIN (V)
IOUT (mA)
TK11215B
OUTPUT VOLTAGE vs. INPUT VOLTAGE
OUTPUT VOLTAGE vs. OUTPUT CURRENT
1.5
IOUT = 0 mA
1.5
30 mA
VOUT (V)
VOUT (V)
1.9 V
60 mA
2.1 V
1.4
1.4
VIN = 1.8 V
2.0 V
2.4 V
120 mA
1.3 1.6
150 mA 90 mA
1.7
1.8
1.9
2.0
2.1
1.3
0
100
200
300
VIN (V)
IOUT (mA)
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October 1999 TOKO, Inc.
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE vs. OUTPUT CURRENT
TK11216B
OUTPUT VOLTAGE vs. INPUT VOLTAGE
1.6
IOUT = 0 mA
1.6
30 mA
VOUT (V)
VOUT (V)
60 mA
1.9 V
2.1 V
1.5
150 mA 120 mA
1.5
VIN = 1.8 V 2.0 V 2.4 V
1.4 1.6
90 mA
1.7
1.8
1.9
2.0
2.1
1.4
0
100
200
300
VIN (V)
IOUT (mA)
TK11217B
OUTPUT VOLTAGE vs. INPUT VOLTAGE OUTPUT VOLTAGE vs. OUTPUT CURRENT
1.7
VOUT (V)
IOUT = 0 mA
1.7 VOUT (V)
1.9 V 2.1 V
30 mA
1.6
60 mA
1.6
VIN = 1.8 V 2.0 V 2.4 V
150 mA 120 mA
1.5 1.6
90 mA
1.5 1.7 1.8 1.9 2.0 2.1 VIN (V)
0
100
200
300
IOUT (mA)
TK11218B
OUTPUT VOLTAGE vs. INPUT VOLTAGE OUTPUT VOLTAGE vs. OUTPUT CURRENT
1.8
IOUT = 0 mA
1.8
VOUT (V)
VOUT (V)
2.0 V 1.9 V 2.1 V
90 mA
1.7
30 mA
1.7
VIN = 1.8 V
2.4 V
150 mA 60 mA
1.6 1.7
120 mA
1.8
1.9
2.0
2.1
2.2
1.6
0
100
200
300
VIN (V)
IOUT (mA)
October 1999 TOKO, Inc.
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TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
OUTPUT VOLTAGE vs. OUTPUT CURRENT
TK11219B
OUTPUT VOLTAGE VS. INPUT VOLTAGE
1.9
IOUT = 0 mA
1.9 VOUT (V)
2.0 V 2.1 V
2.2 V
VOUT (V)
1.8
30 mA 90 mA 150 mA 120 mA
1.8
2.4 V
VIN = 1.9 V
1.7 1.7
60 mA
1.8
1.9
2.0
2.1
2.2
1.7
0
100
200
300
VIN (V)
IOUT (mA)
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October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
OUTPUT VOLTAGE (VOUT) The output voltage is specified with VIN = (VOUT(TYP) + 1 V) and IOUT = 30 mA. DROPOUT VOLTAGE (VDROP) The dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation. Below this value, the output voltage will fall as the input voltage is reduced. It is dependent upon the load current and the junction temperature. OUTPUT CURRENT (IOUT(MAX)) This is the maximum continuous output current specified under the condition where the output voltage drops 0.3 V below the value specified with IOUT = 30 mA. The input voltage is set to VOUT +1 V, and the current is pulsed to minimize temperature effect. CONTINUOUS OUTPUT CURRENT (IOUT) Normal operating output current. This is limited by package power dissipation. PULSE OUTPUT CURRENT (IOUT(PULSE)) Maximum pulse width 5 ms at VOUT upper 2.0 V; 7 ms. at VOUT under 1.9 V; duty cycle 12.5%: pulse load only. LINE REGULATION (Line Reg) Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage is changed from VIN = VOUT(TYP) + 1 V to VIN = VOUT(TYP) + 6 V. LOAD REGULATION (Load Reg) Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. It is a pulsed measurement to minimize temperature effects with the input voltage set to VIN = VOUT +1 V. The load regulation is specified under two output current step conditions of 1 mA to 60 mA and 1 mA to 100 mA. QUIESCENT CURRENT (IQ) The quiescent current is the current which flows through the ground terminal under no load conditions (IOUT = 0 mA). GROUND CURRENT (IGND) Ground current is the current which flows through the ground pin(s). It is defined as IIN - IOUT, excluding ICONT. RIPPLE REJECTION RATIO (RR) Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. It is specified with 100 mVrms, 400 Hz superimposed on the input voltage, where VIN = VOUT + 1.5 V. The output decoupling capacitor is set to 10 F, the noise bypass capacitor is set to 0.1 F, and the load current is set to 30 mA. Ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in dB. STANDBY CURRENT (ISTBY) Standby current is the current which flows into the regulator when the output is turned off by the control function (VCONT = 0 V). It is measured with VIN = 8 V (9 V for the 8 V output device). SENSOR CIRCUITS Overcurrent Sensor The overcurrent sensor protects the device in the event that the output is shorted to ground. Thermal Sensor The thermal sensor protects the device in the event that the junction temperature exceeds the safe value (TJ = 150 C). This temperature rise can be caused by external heat, excessive power dissipation caused by large input to output voltage drops, or excessive output current. The regulator will shut off when the temperature exceeds the safe value. As the junction temperatures decrease, the regulator will begin to operate again. Under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. Damage may occur to the device under extreme fault conditions.
October 1999 TOKO, Inc.
Page 13
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
Reverse Voltage Protection Reverse voltage protection prevents damage due to the output voltage being higher than the input voltage. This fault condition can occur when the output capacitor remains charged and the input is reduced to zero, or when an external voltage higher than the input voltage is applied to the output side. CONTROL FUNCTION
50 40 VOUT
SW
If the control function is not used, connect the control terminal to VIN. When the control function is used, the control current can be reduced by inserting a series resistor (RCONT) between the control terminal and VIN. The value of this resistor should be determined from the graph below.
CONTROL PIN CURRENT VS. VOLTAGE
VIN
ICONT (A)
CN
30 20 RCONT = 0 10 RCONT =100K 0 0 1 2 3 4 5 VCONT (V)
RC
SOT-23L
VIN
SW
RC CN
SOT-89
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October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
ON/OFF RESPONSE WITH CONTROL AND LOAD TRANSIENT RESPONSE The turn-on time depends upon the value of the output capacitor and the noise bypass capacitor. The turn-on time will increase with the value of either capacitor. The graphs below show the relationship between turn-on time and load capacitance. If the value of these capacitors is reduced, the load and line regulation will suffer and the noise voltage will increase. If the value of these capacitors is increased, the turn-on time will increase.
OUTPUT VOLTAGE RESPONSE (OFFON) ILOAD = 10 mA, CN = 1000 pF
OUTPUT VOLTAGE RESPONSE (OFFON) CL = 2.2 F
VCONT
VOUT (200 mV/DIV)
LOAD CURRENT STEP RESPONSE ILOAD = 5 to 35 mA 30 to 60 mA 0 to 30 mA CL = 0.33 F
ILOAD
VCONT
CL = 0.33 F
CN = 0.01 F
CL = 1.0 F CL = 1.5 F CL = 0.47 F 5 15 25 35 45 CN = 0.1 F ILOAD = 30 mA 0 200 400 TIME (s) 600 800
VOUT
-5
VOUT
-5
5
15
25
35
45
TIME (s)
TIME( s)
REDUCTION OF OUTPUT NOISE Although the architecture of the Toko regulators is designed to minimize semiconductor noise, further reduction can be achieved by the selection of external components. The obvious solution is to increase the size of the output capacitor. A more effective solution would be to add a capacitor to the noise bypass terminal. The value of this capacitor should be 0.1 f or higher (higher values provide greater noise reduction). Although stable operation is possible without the noise bypass capacitor, this terminal has a high impedance and care should be taken to avoid a large circuit area on the printed circuit board when the capacitor is not used. Please note that several parameters are affected by the value of the capacitors and bench testing is recommended when deviating from standard values.
October 1999 TOKO, Inc.
Page 15
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
PACKAGE POWER DISSIPATION (PD) This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction temperature exceeds the monitor threshold of 150 C, the IC is shut down. The junction temperature rises as the difference between the input power (VIN x IIN) and the output power (VOUT x IOUT) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting has good thermal conductivity, the junction temperature will be low even if the power dissipation is great. When mounted on the recommended mounting pad, the power dissipation of the SOT-23L is increased to 600 mW. For operation at ambient temperatures over 25 C, the power dissipation of the SOT-23L device should be derated at 4.8 mW/C. The power dissipation of the SOT-89 package is 900 mW when mounted as recommended. Derate the power dissipation at 7.2 mW/C for operation above 25 C. To determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and deliberately increase the output current (or raise the input voltage) until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the input power. These measurements should allow for the ambient temperature of the PCB. The value obtained from PD /(150 C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when mounted is expressed as follows: the output side is shorted. Input current gradually falls as temperature rises. You should use the value when thermal equilibrium is reached. The range of usable currents can also be found from the graph below.
(mW) PD 3
DPD
6 4 5
25
50
75 TA (C)
150
Procedure: 1) 2) 3) 4) Find PD PD1 is taken to be PD x (~0.8 - 0.9) Plot PD1 against 25 C Connect PD1 to the point corresponding to the 150 C with a straight line. 5) In design, take a vertical line from the maximum operating temperature (e.g., 75 C) to the derating curve. 6) Read off the value of PD against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, DPD. The maximum operating current is:
Tj = 0jA x PD + TA IOUT = (DPD / (VIN(MAX) - VOUT) For Toko ICs, the internal limit for junction temperature is 150 C. If the ambient temperature (TA) is 25 C, then: 150 C = 0jA x PD + 25 C 0jA = 125 C/ PD PD is the value when the thermal sensor is activated. A simple way to determine PD is to calculate VIN x IIN when
Page 16
October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
750 600
PD (mW)
1000 MOUNTED AS SHOWN FREE AIR PD (mW) 600 400 200 0
MOUNTED AS SHOWN
800
450 FREE AIR 300 150 0 0 50 TA (C) 100 150
0
50 TA (C)
100
150
SOT-23L POWER DISSIPATION CURVE
SOT-89 POWER DISSIPATION CURVE
SOT-23L BOARD LAYOUT
SOT-89 BOARD LAYOUT
APPLICATION NOTE
Copper pattern should be as large as possible. Power dissipation is 600 mW for SOT-23L and 900 mV for SOT-89. A low Equivalent Series Resistance (ESR) capacitor is recommended. For low temperature operation, select a capacitor with a low ESR at the lowest operating temperature to prevent oscillation, degradation of ripple rejection and increase in noise. The minimum recommended capacitance is 2.2 F.
October 1999 TOKO, Inc.
Page 17
TK112xxB
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS Linear regulators require an output capacitor in order to maintain regulator loop stability. This capacitor should be selected to ensure stable operation over the desired temperature and load range. The graphs below show the effects of capacitance value and ESR on the stable operation area. VOUT =
112xxB
CL ESR 2.0 V 3.0 V 5.0 V
CL = 1 F
1000 1000
CL = 2.2 F
1000
CL = 3.3 F
1000
CL = 10 F
100
100
100
100
ESR ()
ESR ()
ESR ()
10 STABLE OPERATION AREA 1
10 STABLE OPERATION AREA 1
ESR ()
10 STABLE OPERATION AREA 1
10 STABLE OPERATION AREA 1
0.1
0.1
0.1
0.1
0 .01 1 50 IOUT (mA) 100 150
0.01 1 50 IOUT (mA) 100 150
0.01 1 50 IOUT (mA) 100 150
0.01 1 50 IOUT (mA) 100 150
In general, the capacitor should be at least 1 F (aluminum electrolytic) and be rated for the actual ambient operating temperature range. The table below shows typical characteristics for several types and values of capacitance. Please note that the ESR varies widely depending upon manufacturer, type, size, and material. ESR Capacitance 1.0 F 2.2 F 3.3 F 10 F Aluminum Capacitor 2.4 2.0 4.6 1.4 Tantalum Capacitor 2.3 1.9 1.0 0.5 Ceramic Capacitor 0.140 0.059 0.049 0.025
Note: ESR is measured at 10 kHz.
Page 18
October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
Specification Parameter Output voltage tolerance Quiescent current Output current Dropout voltage (IOUT = 50 mA) Ripple rejection at low line regulation point (See Figure below) Built-in reverse bias protection ESD protection
TK112xx 3.0% 180 A 130 mA 160 mV
TK112xxB 2.0% 170 A 150 mA 110 mV Superior
NO
YES Superior
TK112xxB
VOUT
TK112xx
Input ripple noise
October 1999 TOKO, Inc.
Page 19
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx
QUIESCENT CURRENT vs. OUTPUT CURRENT 10 8 10 8
IQ (mA)
TK112xxB
QUIESCENT CURRENT vs. OUTPUT CURRENT
IQ (mA)
6 4 2 0
6 4 2 0
0
100 IOUT (mA)
200
0
100 IOUT (mA)
200
SHORT CIRCUIT CURRENT 5 4
SHORT CIRCUIT CURRENT 5 4
VOUT (V)
3 2 1 0
VOUT (V)
0 150 IOUT (mA) 300
3 2 1 0
0
150 IOUT (mA)
300
DROPOUT VOLTAGE vs. OUTPUT CURRENT 0 -100 0 -100
DROPOUT VOLTAGE vs. OUTPUT CURRENT
VDROP (mV)
-200 -300 -400
VDROP (mV)
0 100 IOUT (mA) 200
-200 -300 -400
0
100 IOUT (mA)
200
Page 20
October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx
OUTPUT VOLTAGE vs. INPUT VOLTAGE VOUT(TYP)
VOUT (25 mV/DIV)
TK112xxB
OUTPUT VOLTAGE VS. INPUT VOLTAGE VOUT(TYP)
VOUT (25 mV/Div)
IOUT = 0 mA IOUT = 30 mA IOUT = 60 mA
IOUT = 0 mA
IOUT = 30 mA IOUT = 50 mA IOUT = 90 mA
5
IOUT = 60 mA
0
VIN = VOUT VIN (V) (50 mV/Div)
0
VIN = VOUT VIN (V) (50 mV/DIV)
REVERSE BIAS CURRENT 500 400 IREV (A)
VIN = 0 V
REVERSE BIAS CURRENT 500 400
VIN = 0 V
IREV (A)
300 200 100 0
300 200 100 0
0
10 VREV (V)
20
0
10 VREV (V)
20
LOAD REGULATION
LOAD REGULATION
VOUT(TYP) VOUT (5 mV/DIV)
0
50 IOUT (mA)
100
VOUT (5 mV/DIV)
0
VOUT(TYP)
50 IOUT (mA)
100
October 1999 TOKO, Inc.
Page 21
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx TK112xxB
LINE REGULATION VOUT(TYP)
LINE REGULATION VOUT(TYP)
VOUT (50 mV/DIV)
VOUT (50 mV/DIV)
0
10 VIN (V)
20
0
10 VIN (V)
20
QUIESCENT CURRENT (OFF MODE) VS. INPUT VOLTAGE 100 100
QUIESCENT CURRENT (OFF MODE) VS. INPUT VOLTAGE
IQ (pA)
50
IQ (pA) 10 VIN (V)
50
0
0
20
0
0
10 VIN (V)
20
Page 22
October 1999 TOKO, Inc.
TK112xxB
NOTES
October 1999 TOKO, Inc.
Page 23
TK112xxB
PACKAGE OUTLINE
0.4 6 5 4 Marking
+0.15 - 0.05
SOT-23L (SOT-23L-6)
0.1
M
0.6
Marking Information
Product Code P Voltage Code
TK11213B TK11214B TK11215B TK11216B TK11217B TK11218B TK11219B TK11220B TK11221B TK11222B TK11223B TK11224B TK11225B TK11226B TK11227B TK11228B TK11229B TK11230B TK11231B TK11232B TK11233B TK11234B TK11235B TK11236B TK11237B TK11238B TK11239B TK11240B TK11241B TK11242B TK11243B TK11244B TK11245B TK11246B TK11247B TK11248B TK11249B TK11250B TK11255B TK11280B 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 55 80
1.0
Product Code
Voltage Code
1 e
2 e 0.95
3 0.32 5 PL 0.95
+0.15 - 0.05
0.1
M
e 0.95
e 0.95
Recommended Mount Pad
3.5
+0.3 - 0.1
(3.4)
2.2
0.3
1.4 max
e1 3.0 0.15
Note: Pin 2 and Pin 5 should be grounded for heat dissipation
0 - 0.1
+0.15 - 0.05
15 max
1.2
0.4
+ 0.3
Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified)
3.3
4.5
0.44 max
SOT-89 (SOT 89-5)
1.6 0.49 max 0.49 max 0.49 max 4
6
5
0.4
Lot Number Voltage Code
+0.5 -0.3
4.5
Product Code
2.5
1.0
1 0.49 max
2
3 0.54 max 0.49 max 0.7 max 1.0 0.7 max
e 1.5 e' 3.0
e
1.5
1.5 1.5
1.0
0.44 max
2.0 e 1.5 e 1.5
Recommended Mount Pad Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified)
Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
Page 24
(c) 1999 Toko, Inc. All Rights Reserved IC-215-TK112B 0798O0.0K
1.5
0.7
45
0.8
0.7
October 1999 TOKO, Inc.
Printed in the USA

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