October 1999 TOKO, Inc. Page 1
TK112xxB
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
Internal Thermal Shutdown
Short Circuit Protection
APPLICATIONS
Battery Powered Systems
Cellular Telephones
Pagers
Personal Communications Equipment
Portable Instrumentation
Portable Consumer Equipment
Radio Control Systems
Toys
Low Voltage Systems
BLOCK DIAGRAM
TK112xxB
GND
CONTROL
VOUT
VIN
NOISE BYPASS
GND
VOUT
GND
NOISE BYPASS
GND
CONTROL VIN
DESCRIPTION
The TK112xxB is a low dropout linear regulator with a built-
in 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 µVrms.
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 µA 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.
ORDERING INFORMATION
TAPE/REEL CODE
L: Tape Left (SOT-23L)
B: Tape Left (SOT-89)
TEMP. CODE:
C: -30 to +80 C
I: -40 to +85 C
Tape/Reel Code
TK112 B
Voltage Code
Package Code
PACKAGE CODE:
M: SOT-23L
U: SOT-89
NOTE 1:
1.3 V to 1.9 V available
in SOT-23L package only.
NOTE 2:
1.3 V to 2.4 V available
in C temperature code
(-30 to +80 C) only.
VOLTAGE CODE
13 = 1.3 V 33 = 3.3 V
14 = 1.4 V 34 = 3.4 V
15 = 1.5 V 35 = 3.5 V
16 = 1.6 V 36 = 3.6 V
17 = 1.7 V 37 = 3.7 V
18 = 1.8 V 38 = 3.8 V
19 = 1.9 V 39 = 3.9 V
20 = 2.0 V 40 = 4.0 V
21 = 2.1 V 41 = 4.1 V
22 = 2.2 V 42 = 4.2 V
23 = 2.3 V 43 = 4.3 V
24 = 2.4 V 44 = 4.4 V
25 = 2.5 V 45 = 4.5 V
26 = 2.6 V 46 = 4.6 V
27 = 2.7 V 47 = 4.7 V
28 = 2.8 V 48 = 4.8 V
29 = 2.9 V 49 = 4.9 V
30 = 3.0 V 50 = 5.0 V
31 = 3.1 V 55 = 5.5 V
32 = 3.2 V 80 = 8.0 V
Temp. Code
20P
NOISE
BYPASS
VIN VOUT
THERMAL
PROTECTION
BANDGAP
REFERENCE
CONTROL
GND
SOT-23L
SOT-89
VOLTAGE REGULATOR WITH ON/OFF SWITCH
This Material Copyrighted By Its Respective Manufacturer
Page 2 October 1999 TOKO, Inc.
TK112xxB
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
ABSOLUTE MAXIMUM RATINGS TK112xxBC (VOUT 2.0 V)
TK112xxBC ELECTRICAL CHARACTERISTICS (VOUT 2.0 V)
Test conditions: TA = 25 °C, unless otherwise specified.
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.
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
I
Q
tnerruCtnecseiuQI
TUO
IgnidulcxE,Am0=
TNOC
071052Aµ
I
YBTS
tnerruCybdnatSV
NI
FFOtuptuO,V8=1.0Aµ
V
TUO
egatloVtuptuOI
TUO
Am03=1elbaTeeSV
geReniLnoitalugeReniL V
TUO
)2etoN(,V5.50.302Vm
V
TUO
)2etoN(,V6.55104Vm
geRdaoLnoitalugeRdaoL
I
TUO
)2etoN(,Am06ot1=603Vm
I
TUO
)2etoN(,Am001ot1=8106Vm
I
TUO
)2etoN(,Am051ot1=3209Vm
V
PORD
egatloVtuoporD I
TUO
)2etoN(,Am06=21.002.0V
I
TUO
)2etoN(,Am051=62.093.0V
I
TUO
tnerruCtuptuOsuounitnoC)2etoN(051Am
I
)ESLUP(TUO
tnerruCtuptuOesluPelcycytud%5.21,eslupsm5081Am
RRnoitcejeRelppiR C,zH004=f
L
C,Fµ01=
N
,Fµ1.0=
V
NI
V=
TUO
I,V5.1+
TUO
,Am03=
V
ELPPIR
)3etoN(,smrVm001= 06Bd
V
ON
egatloVesioNtuptuO zH01 fC,zHk08
L
,Fµ01=
C
N
V,Fµ1.0=
NC
V=
TUO
,V5.1+
I
TUO
)4,3setoN(,Am06= 03smrVµ
V
fer
lanimreTssapyBesioN egatloV 52.1V
V
TUO
/TtneiciffeoCerutarepmeTI
TUO
Am01=04C°/mpp
SNOITACIFICEPSLANIMRETLORTNOC
I
TNOC
tnerruClortnoCV
TNOC
NOtuptuO,V8.1=2153Aµ
V
)NO(TNOC
NOegatloVlortnoCNOtuptuO8.1V
V
)FFO(TNOC
FFOegatloVlortnoCFFOtuptuO6.0V
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 3
TK112xxB
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
ABSOLUTE MAXIMUM RATINGS TK1121xBC (VOUT 1.9 V)
TK1121xBC ELECTRICAL CHARACTERISTICS (VOUT 1.9 V)
Test conditions: TA = 25 °C, unless otherwise specified.
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.
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
I
Q
tnerruCtnecseiuQI
TUO
IgnidulcxE,Am0=
TNOC
071052Aµ
I
YBTS
tnerruCybdnatSV
NI
FFOtuptuO,V8=1.0Aµ
V
TUO
egatloVtuptuOI
TUO
Am03=2elbaTeeSV
geReniLnoitalugeReniL)2etoN(0.302Vm
geRdaoLnoitalugeRdaoL I
TUO
)2etoN(,Am06ot1=603Vm
I
TUO
)2etoN(,Am001ot1=8106Vm
I
TUO
tnerruCtuptuOsuounitnoC V4.2 V
NI
)2etoN(,V6.2031Am
V
NI
)2etoN(,V6.2051Am
I
)ESLUP(TUO
tnerruCtuptuOesluP V,eslupsm5
NI
,V6.2
elcycytud%5.21 081Am
RRnoitcejeRelppiR C,zH004=f
L
C,Fµ01=
N
,Fµ1.0=
V
NI
V=
TUO
I,V5.1+
TUO
,Am03=
V
ELPPIR
)3etoN(,smrVm001= 55Bd
V
ON
egatloVesioNtuptuO zH01 fC,zHk08
L
,Fµ01=
C
N
V,Fµ1.0=
NC
V=
TUO
,V5.1+
I
TUO
)4,3setoN(,Am06= 03smrVµ
V
fer
lanimreTssapyBesioN egatloV 52.1V
V
TUO
/TtneiciffeoCerutarepmeTI
TUO
Am01=04C°/mpp
SNOITACIFICEPSLANIMRETLORTNOC
I
TNOC
tnerruClortnoCV
TNOC
NOtuptuO,V8.1=2153Aµ
V
)NO(TNOC
NOegatloVlortnoCNOtuptuO8.1V
V
)FFO(TNOC
FFOegatloVlortnoCFFOtuptuO6.0V
This Material Copyrighted By Its Respective Manufacturer
Page 4 October 1999 TOKO, Inc.
TK112xxB
TK112xxBI ELECTRICAL CHARACTERISTICS (VOUT 2.5 V)
Test conditions: TA = -40 to 85 °C, unless otherwise specified.
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
ABSOLUTE MAXIMUM RATINGS TK112xxBI (VOUT 2.5 V)
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
I
Q
tnerruCtnecseiuQI
TUO
IgnidulcxE,Am0=
TNOC
071003Aµ
I
YBTS
tnerruCybdnatSV
NI
FFOtuptuO,V8=2.0Aµ
V
TUO
egatloVtuptuOI
TUO
Am03=3elbaTeeSV
geReniLnoitalugeReniL V
TUO
)2etoN(,V5.50.352Vm
V
TUO
)2etoN(,V6.55104Vm
geRdaoLnoitalugeRdaoL
I
TUO
)2etoN(,Am06ot1=604Vm
I
TUO
)2etoN(,Am001ot1=8108Vm
I
TUO
)2etoN(,Am051ot1=32011Vm
V
PORD
egatloVtuoporD I
TUO
)2etoN(,Am06=21.032.0V
I
TUO
)2etoN(,Am051=62.004.0V
I
TUO
tnerruCtuptuOsuounitnoC)2etoN(051Am
I
)ESLUP(TUO
tnerruCtuptuOesluPelcycytud%5.21,eslupsm5081Am
RRnoitcejeRelppiR C,zH004=f
L
C,Fµ01=
N
,Fµ1.0=
V
NI
V=
TUO
I,V5.1+
TUO
,Am03=
V
ELPPIR
)3etoN(,smrVm001= 06Bd
V
ON
egatloVesioNtuptuO zH01 fC,zHk08
L
,Fµ01=
C
N
V,Fµ1.0=
NC
V=
TUO
,V5.1+
I
TUO
)4,3setoN(,Am06= 03smrVµ
V
fer
lanimreTssapyBesioN egatloV 52.1V
V
TUO
/TtneiciffeoCerutarepmeTI
TUO
Am01=04C°/mpp
SNOITACIFICEPSLANIMRETLORTNOC
I
TNOC
tnerruClortnoCV
TNOC
NOtuptuO,V8.1=2104Aµ
V
)NO(TNOC
NOegatloVlortnoCNOtuptuO0.2V
V
)FFO(TNOC
FFOegatloVlortnoCFFOtuptuO5.0V
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.
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 5
TK112xxB
Output Voltage VOUT(MIN) VOUT(MAX) Test
Voltage Code Voltage
1.3 V 13 1.240 V 1.36 V 2.4 V
1.4 V 14 1.340 V 1.46 V 2.4 V
1.5 V 15 1.440 V 1.560 V 2.4 V
1.6 V 16 1.540 V 1.660 V 2.4 V
1.7 V 17 1.640 V 1.760 V 2.4 V
1.8 V 18 1.740 V 1.860 V 2.4 V
1.9 V 19 1.804 V 1.960 V 2.4 V
Output Voltage VOUT(MIN) VOUT(MAX) Test
Voltage Code Voltage
2.0 V 20 1.940 V 2.060 V 3.0 V
2.1 V 21 2.040 V 2.160 V 3.1 V
2.2 V 22 2.140 V 2.260 V 3.2 V
2.3 V 23 2.240 V 2.360 V 3.3 V
2.4 V 24 2.340 V 2.460 V 3.4 V
2.5 V 25 2.440 V 2.560 V 3.5 V
2.6 V 26 2.540 V 2.660 V 3.6 V
2.7 V 27 2.640 V 2.760 V 3.7 V
2.8 V 28 2.740 V 2.860 V 3.8 V
2.9 V 29 2.840 V 2.960 V 3.9 V
3.0 V 30 2.940 V 3.060 V 4.0 V
3.1 V 31 3.040 V 3.160 V 4.1 V
3.2 V 32 3.140 V 3.260 V 4.2 V
3.3 V 33 3.240 V 3.360 V 4.3 V
3.4 V 34 3.335 V 3.465 V 4.4 V
3.5 V 35 3.435 V 3.565 V 4.5 V
3.6 V 36 3.535 V 3.665 V 4.6 V
Output Voltage VOUT(MIN) VOUT(MAX) Test
Voltage Code Voltage
3.7 V 37 3.630 V 3.770 V 4.7 V
3.8 V 38 3.725 V 3.875 V 4.8 V
3.9 V 39 3.825 V 3.975 V 4.9 V
4.0 V 40 3.920 V 4.080 V 5.0 V
4.1 V 41 4.020 V 4.180 V 5.1 V
4.2 V 42 4.120 V 4.280 V 5.2 V
4.3 V 43 4.215 V 4.385 V 5.3 V
4.4 V 44 4.315 V 4.485 V 5.4 V
4.5 V 45 4.410 V 4.590 V 5.5 V
4.6 V 46 4.510 V 4.690 V 5.6 V
4.7 V 47 4.605 V 4.795 V 5.7 V
4.8 V 48 4.705 V 4.895 V 5.8 V
4.9 V 49 4.800 V 5.000 V 5.9 V
5.0 V 50 4.900 V 5.100 V 6.0 V
5.5 V 55 5.390 V 5.610 V 6.5 V
8.0 V 80 7.840 V 8.160 V 9.0 V
TK112xxBMC ELECTRICAL CHARACTERISTICS TABLE 1
Test conditions: TA = 25 °C, IOUT = 30 mA, unless otherwise specified.
TK112xxBC ELECTRICAL CHARACTERISTICS TABLE 2
Test conditions: TA = 25 °C, IOUT = 30 mA, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
Page 6 October 1999 TOKO, Inc.
TK112xxB
TK112xxBI ELECTRICAL CHARACTERISTICS TABLE 3
Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 30 mA, unless otherwise specified.
Room Temp. Range (TA = 25 °C) Full Temp. Range (TA = -40 to +85 °C)
Output Voltage VOUT(MIN) VOUT(MAX) VOUT(MIN) VOUT(MAX)
Voltage Code
2.5 V 25 2.440 V 2.560 V 2.400 V 2.600 V
2.6 V 26 2.540 V 2.660 V 2.500 V 2.700 V
2.7 V 27 2.640 V 2.760 V 2.600 V 2.800 V
2.8 V 28 2.750 V 2.860 V 2.700 V 2.900 V
2.9 V 29 2.840 V 2.960 V 2.800 V 3.000 V
3.0 V 30 2.940 V 3.060 V 2.900 V 3.100 V
3.1 V 31 3.040 V 3.160 V 3.000 V 3.200 V
3.2 V 32 3.140 V 3.260 V 3.095 V 3.305 V
3.3 V 33 3.240 V 3.360 V 3.190 V 3.410 V
3.4 V 34 3.335 V 3.465 V 3.290 V 3.510 V
3.5 V 35 3.435 V 3.565 V 3.385 V 3.615 V
3.6 V 36 3.535 V 3.665 V 3.485 V 3.720 V
3.7 V 37 3.630 V 3.770 V 3.580 V 3.820 V
3.8 V 38 3.725 V 3.875 V 3.675 V 3.925 V
3.9 V 39 3.825 V 3.975 V 3.770 V 4.030 V
4.0 V 40 3.920 V 4.080 V 3.870 V 4.130 V
4.1 V 41 4.020 V 4.180 V 3.965 V 4.235 V
4.2 V 42 4.120 V 4.280 V 4.060 V 4.335 V
4.3 V 43 4.215 V 4.385 V 4.160 V 4.440 V
4.4 V 44 4.315 V 4.485 V 4.255 V 4.545 V
4.5 V 45 4.410 V 4.590 V 4.350 V 4.645 V
4.6 V 46 4.510 V 4.690 V 4.450 V 4.750 V
4.7 V 47 4.605 V 4.795 V 4.545 V 4.850 V
4.8 V 48 4.705 V 4.895 V 4.640 V 4.955 V
4.9 V 49 4.800 V 5.000 V 4.740 V 5.060 V
5.0 V 50 4.900 V 5.100 V 4.835 V 5.165 V
5.5 V 55 5.390 V 5.610 V 5.320 V 5.680 V
8.0 V 80 7.840 V 8.160 V 7.745 V 8.265 V
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 7
TK112xxB
CONT
NOISE
BYPASS
VCONT 1
IIN
IOUT
CN
0.1 µF
VOUT
VIN
1.0 µF
2.2 µF
ICONT
VIN
++
+
+
VOUT
IOUT
ICONT CN
0.1 µF
CONT
VCONT
1 µF
VIN
VIN
IIN
VOUT
+
NOISE
BYPASS
+
+
VOUT
2.2 µF
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, unless otherwise specified.
TEST CIRCUITS
SOT-23L SOT-89
VIN
CONT
VOUT
RS
1 µF
CNCL = 10 µF to 0.22 µF
0.1 µF
112XXB
OUTPUT VOLTAGE RESPONSE
(OFFON)
0 200 600
TIME (µs)
400 800
CN = 0.01 µF
CN = 0.1 µF
CL = 2.2 µF
ILOAD = 30 mA
VCONT
VOUT
LOAD REGULATION
0 50 100
IOUT (mA)
VOUT (5 mV/DIV)
VOUT(TYP)
SHORT CIRCUIT CURRENT
0150 300
IOUT (mA)
VOUT (V)
5
4
3
2
1
0
OUTPUT VOLTAGE
VS.
INPUT
VOLTAGE
0V
IN = VOUT
VIN (V) (50 mV/DIV)
IOUT = 30 mA
IOUT = 50 mA
IOUT = 90 mA
IOUT = 0 mA
V
OUT
(25
m
V/DIV)
VOUT(TYP)
LINE REGULATION
010 20
VIN (V)
VOUT (50 mV/DIV)
VOUT(TYP)
DROPOUT VOLTAGE
VS.
OUTPUT CURRENT
0 200
IOUT (mA)
VDROP (mV)
-400
-300
-200
0
100
-100
TRANSIENT RESPONSE
Note: Connect pin 5 to
ground for heat sink
This Material Copyrighted By Its Respective Manufacturer
Page 8 October 1999 TOKO, Inc.
TK112xxB
GROUND CURRENT VS. OUTPUT
CURRENT
0 100 200
IOUT (mA)
IGND (mA)
10
8
6
4
2
0
REVERSE BIAS CURRENT
(VIN = 0 V)
020
VREV (V)
0
I
REV
(
µ
A)
100
200
300
400
500
10
1.9 V
2.0 V
VOUT = 1.3 V
UPPER
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
020
VIN (V)
0
IQ (pA)
50
100
10
QUIESCENT CURRENT (ON
MODE) vs. INPUT VOLTAGE
05
0
IQ (mA)
0.5
1.0
2.5
VIN (V)
IOUT = 0 mA
VOUT = 1.3 to 1.8 V
VOUT = 1.9 V
VOUT
GROUND CURRENT
-50 100
0
IGND (mA)
2
1
050
TA (°C)
IOUT = 60 mA
IOUT = 30 mA
DROPOUT VOLTAGE
-50 100
0
VDROP (mV)
100
050
200
300
400
500
TA (°C)
IOUT = 150 mA
IOUT = 60 mA
IOUT = 30 mA
CONTROL CURRENT
-50 100
0
ICONT (µA)
10
050
30
40
50
TA (°C)
20
VCONT = 5 V
VCONT = 1.8 V
VCONT (VOUT, ON POINT)
-50 100
0
VCONT (V)
50
1.0
2.0
TA (°C)
0
RCONT = 0
QUIESCENT CURRENT (ON
MODE)
VS
.
INPUT
VOLTAGE
010
0
IQ (mA)
1
2
5
VIN (V)
IOUT = 0 mA
VOUT =
3 V 5 V
2 V 4 V
VOUT = 1.3 to 1.8 V
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 9
TK112xxB
OUTPUT VOLTAGE VARIATION
-50 100
VOUT (mV)
050
TA (°C)
-20
-10
0
10
-30
VOUT = 2 V 4 V
5 V
3 V
LINE VOLTAGE STEP RESPONSE
VIN
VOUT
CN = 0.001 µF, CL = .22 µF
CN = 0.01 µF, CL = 2.2 µF
VOUT +2 V
VOUT +1 V
VOUT
TIME (50 µs/DIV)
VOUT (10 mV/DIV)
LOAD CURRENT STEP RESPONSE
IOUT
VOUT
CN = 0.01 F, CL = 2.2 µF
100 mA
50 mA
CN = 0.1 F, CL = 10 µF
VOUT
TIME (50 µs/DIV)
V
OUT
(50
m
V/DIV)
NOISE LEVEL
VS.
CN
1 PF 10 CN
50
NOISE (µV)
200
100
150
250
1000
0100 .01 µF .1
CL = 2.2 µF
VOUT = 3 V
IOUT = 60 mA
CL = 10 µF
CL = 3.3µF
NOISE SPECTRUM
01 M
-100
dB
0
-50
500
k
f (Hz)
CL = 3.3 µF, CN = NONE
CL = 3.3 µF, CN = 0.1 µF
SPECTRUM ANALYZER BACK-
GROUND NOISE
-50 100
IOUT (mA)
050
280
TA (°C)
240
250
260
270
VOUT = 1.9 V
VOUT = 2 to 2.6 V
VOUT = 2.7 V
VOUT = 1.3 V
MAXIMUM OUTPUT CURRENT
UPPER
UNDER
RIPPLE REJECTION
0.01 0.1 f (kHz)
-80
RR (dB)
-20
-60
-40
0
1
-100 10 100
CN = 0.1 µF CN = 0.01 µF
I OUT = 30 mA
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
Page 10 October 1999 TOKO, Inc.
TK112xxB
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0300
V
OUT
(V)
1.1 100 200
1.2
1.3
IOUT (mA)
2.4 V
2.1 V
2.0 V
1.9 V
VIN = 1.8 V
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6 2.1
V
OUT
(V)
1.1
1.3
1.7
1.2
1.8 1.9 2.0
VIN (V)
150 mA
120 mA
90 mA
60 mA
30 mA
IOUT = 0 mA
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
V
OUT
(V)
1.2 100 200
1.3
1.4
IOUT (mA)
2.4 V
2.0 V
2.1 V
1.9 V
VIN = 1.8 V
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6 2.1
VOUT (V)
1.2
1.4
1.7
1.3
1.8 1.9 2.0
VIN (V)
IOUT = 0 mA
30 mA
60 mA
150 mA
120 mA
90 mA
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
VOUT (V)
1.3 100 200
1.4
1.5
IOUT (mA)
VIN = 1.8 V
1.9 V
2.4 V
2.1 V
2.0 V
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6 2.1
VOUT (V)
1.3
1.5
1.7
1.4
1.8 1.9 2.0
VIN (V)
IOUT = 0 mA
30 mA
60 mA
150 mA
120 mA
90 mA
TK11213B
TK11214B
TK11215B
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 11
TK112xxB
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6 2.1
OUT
1.5
1.7
1.7
1.6
1.8 1.9 2.0
VIN (V)
IOUT = 0 mA
30 mA
60 mA
150 mA
120 mA
90 mA
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6 2.1
VOUT (V)
1.4
1.6
1.7
1.5
1.8 1.9 2.0
VIN (V)
IOUT = 0 mA
30 mA
60 mA
150 mA
90 mA
120 mA
TK11216B
TK11217B
TK11218B
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
VOUT (V)
1.4 100 200
1.5
1.6
IOUT (mA)
VIN = 1.8 V
1.9 V
2.0 V
2.1 V
2.4 V
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
VOUT (V)
1.5 100 200
1.6
1.7
IOUT (mA)
VIN = 1.8 V
1.9 V
2.4 V
2.0 V
2.1 V
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
VOUT (V)
1.6 100 200
1.7
1.8
IOUT (mA)
1.9 V
2.0 V 2.1 V
2.4 V
VIN = 1.8 V
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.7 2.2
VOUT (V)
1.6
1.8
1.8
1.7
1.9 2.0 2.1
VIN (V)
IOUT = 0 mA
150 mA
120 mA
90 mA
60 mA
30 mA
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
Page 12 October 1999 TOKO, Inc.
TK112xxB
OUTPUT VOLTAGE
VS.
INPUT
VOLTAGE
1.7 2.2
VOUT (V)
1.7
1.9
1.8
1.8
1.9 2.0 2.1
VIN (V)
150 mA
120 mA
30 mA
60 mA
90 mA
IOUT = 0 mA
TK11219B OUTPUT VOLTAGE vs. OUTPUT
CURRENT
0 300
VOUT (V)
1.7 100 200
1.8
1.9
IOUT (mA)
2.2 V
2.1 V
2.0 V
VIN = 1.9 V
2.4 V
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 13
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 µF, the noise bypass
capacitor is set to 0.1 µF, 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.
This Material Copyrighted By Its Respective Manufacturer
Page 14 October 1999 TOKO, Inc.
TK112xxB
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
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
CN
VIN
SW
RC
SOT-23L
CN
VIN
SW
RC
SOT-89
CONTROL PIN CURRENT VS.
VOLTAGE
0123
VCONT (V)
0
I
CONT
(
µ
A)
10
20
30
40
50
45
VOUT
RCONT =100K
RCONT = 0
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.
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 15
TK112xxB
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.
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
OUTPUT VOLTAGE RESPONSE
(OFFON)
-5 5 2515 35
CL = 0.33 µF
45
CL = 1.0 µF
CL = 1.5 µF
CL = 0.47 µF
TIME (µs)
ILOAD = 10 mA, CN = 1000 pF
V
OUT VCONT
LOAD CURRENT STEP RESPONSE
-5 5 15 3525 45
TIME( µs)
CL = 0.33 µF
VOUT (200 mV/DIV)
ILOAD
ILOAD = 5 to 35 mA
30 to 60 mA
0 to 30 mA
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 µf 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.
OUTPUT VOLTAGE RESPONSE
(OFFON)
0 200 600
TIME (µs)
400 800
CN = 0.01 µF
CN = 0.1 µF
CL = 2.2 µF
ILOAD = 30 mA
VCONT
VOUT
This Material Copyrighted By Its Respective Manufacturer
Page 16 October 1999 TOKO, Inc.
TK112xxB
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.
Procedure:
1) Find PD
2) PD1 is taken to be PD x (~0.8 - 0.9)
3) Plot PD1 against 25 °C
4) 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:
IOUT = (DPD / (VIN(MAX) - VOUT)
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:
Tj = 0jA x PD + TA
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
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
PD
DPD
25 50 75 150
(mW)
TA (°C)
3
6
5
4
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 17
TK112xxB
SOT-23L POWER DISSIPATION CURVE SOT-89 POWER DISSIPATION CURVE
0 50 100
TA (°C)
P
D
(
m
W)
150
0
450
750
150
300
600 MOUNTED AS
SHOWN
FREE AIR
0 50 100
TA (°C)
PD (mW)
150
0
600
1000
200
400
800
MOUNTED AS
SHOWN
FREE AIR
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 µF.
SOT-89 BOARD LAYOUT
SOT-23L BOARD LAYOUT
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
This Material Copyrighted By Its Respective Manufacturer
Page 18 October 1999 TOKO, Inc.
TK112xxB
1000
100
10
1
0.1
0.01
1 50 100 150
IOUT (mA)
STABLE
OPERATION
AREA
ESR (Ω)
1000
100
10
1
0.1
0 .01
1 50 100 150
IOUT (mA)
ESR (Ω)
STABLE
OPERATION
AREA
1000
100
10
1
0.1
0.01
1 50 100 150
IOUT (mA)
STABLE
OPERATION
AREA
ESR ()
1000
100
10
1
0.1
0.01
1 50 100 150
IOUT (mA)
STABLE
OPERATION
AREA
ESR ()
APPLICATION INFORMATION
In general, the capacitor should be at least 1 µF (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.
CL = 1 µFC
L = 2.2 µFCL = 3.3 µFCL = 10 µF
Note: ESR is measured at 10 kHz.
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.
2.0 V
3.0 V
5.0 V
112xxB
CL
ESR
VOUT =
ESR
Capacitance Aluminum
Capacitor Tantalum
Capacitor Ceramic
Capacitor
1.0 µF 2.42.3 0.140
2.2 µF 2.01.9 0.059
3.3 µF 4.61.0 0.049
10 µF 1.4 0.5 0.025
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 19
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
Specification Parameter TK112xx TK112xxB
Output voltage tolerance 3.0% 2.0%
Quiescent current 180 µA 170 µA
Output current 130 mA 150 mA
Dropout voltage (I
OUT
= 50 mA) 160 mV 110 mV
Ripple rejection at low line
regulation point (See Figure below) Superior
Built-in reverse bias protection NO YES
ESD protection Superior
VOUT
TK112xxB
TK112xx
Input ripple noise
This Material Copyrighted By Its Respective Manufacturer
Page 20 October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx TK112xxB
QUIESCENT CURRENT vs.
OUTPUT CURRENT
IOUT (mA)
IQ (mA)
0
6
10
0 100 200
2
4
8
QUIESCENT CURRENT vs.
OUTPUT CURRENT
IOUT (mA)
IQ (mA)
0
6
10
0 100 200
2
4
8
SHORT CIRCUIT CURRENT
IOUT (mA)
VOUT (V)
0
3
5
0 150 300
1
2
4
SHORT CIRCUIT CURRENT
IOUT (mA)
VOUT (V)
0
3
5
0 150 300
1
2
4
DROPOUT VOLTAGE vs.
OUTPUT CURRENT
IOUT (mA)
VDROP (mV)
-200
0
0 100 200
-400
-300
-100
DROPOUT VOLTAGE vs.
OUTPUT CURRENT
IOUT (mA)
VDROP (mV)
-200
0
0 100 200
-400
-300
-100
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 21
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx TK112xxB
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
VIN (V) (50 mV/Div)
VOUT (25 mV/Div)
0
5
IOUT =
0 mA
IOUT = 30 mA
IOUT = 60 mA
IOUT = 60 mA
VIN = VOUT
VOUT(TYP)
OUTPUT VOLTAGE VS.
INPUT VOLTAGE
0V
IN = VOUT
VIN (V) (50 mV/DIV)
IOUT = 30 mA
IOUT = 50 mA
IOUT = 90 mA
IOUT = 0 mA
VOUT (25 mV/DIV)
VOUT(TYP)
REVERSE BIAS CURRENT
VREV (V)
0
300
500
0 10 20
100
200
400
VIN = 0 V
IREV (µA)
REVERSE BIAS CURRENT
VREV (V)
0
300
500
0 10 20
100
200
400
VIN = 0 V
IREV (µA)
LOAD REGULATION
0 50 100
IOUT (mA)
VOUT (5 mV/DIV)
VOUT(TYP)
LOAD REGULATION
0 50 100
IOUT (mA)
VOUT (5 mV/DIV)
VOUT(TYP)
This Material Copyrighted By Its Respective Manufacturer
Page 22 October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx TK112xxB
LINE REGULATION
010 20
VIN (V)
VOUT (50 mV/DIV)
VOUT(TYP)
LINE REGULATION
010 20
VIN (V)
VOUT (50 mV/DIV)
VOUT(TYP)
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
020
VIN (V)
0
IQ (pA)
50
100
10
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
020
VIN (V)
0
IQ (pA)
50
100
10
This Material Copyrighted By Its Respective Manufacturer
October 1999 TOKO, Inc. Page 23
TK112xxB
NOTES
This Material Copyrighted By Its Respective Manufacturer
Page 24 October 1999 TOKO, Inc.
TK112xxB
Marking Information
Product Code P
Voltage Code
TK11213B 13
TK11214B 14
TK11215B 15
TK11216B 16
TK11217B 17
TK11218B 18
TK11219B 19
TK11220B 20
TK11221B 21
TK11222B 22
TK11223B 23
TK11224B 24
TK11225B 25
TK11226B 26
TK11227B 27
TK11228B 28
TK11229B 29
TK11230B 30
TK11231B 31
TK11232B 32
TK11233B 33
TK11234B 34
TK11235B 35
TK11236B 36
TK11237B 37
TK11238B 38
TK11239B 39
TK11240B 40
TK11241B 41
TK11242B 42
TK11243B 43
TK11244B 44
TK11245B 45
TK11246B 46
TK11247B 47
TK11248B 48
TK11249B 49
TK11250B 50
TK11255B 55
TK11280B 80
0.49 max 0.54 max 0.49 max
1.5
3.0
2.5
1.0
4.5
e
e'
0.49 max 0.49 max
1.6
4.5
0.4
0.44 max
0.44 max
+0.5
-0.3
64
3
2
1
1.5
0.7 max 1.0 0.7 max
1.5
0.7
0.8
0.7
1.5
2.0
1.5
Recommended Mount Pad
45 °
1.5
1.5
e
ee
5
Product Code
0.49 max
Voltage Code
Lot Number
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
1.0
Note: Pin 2 and Pin 5 should be
grounded for heat dissipation
0.95 0.95
0.32
e e M
0.1
(3.4)
1.2
0.15 0.3
3.3
2.2
0.4
0.95 0.95
3.0
ee
e1
0.6
1.0
Recommended Mount Pad
123
456
0 - 0.1
0.4 M
0.1
15 max
1.4 max
Marking
+0.15
- 0.05
+0.15
- 0.05
+ 0.3
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
Voltage Code
Product Code
5 PL
3.5
+0.3
- 0.1
+0.15
- 0.05
SOT-23L (SOT-23L-6)
PACKAGE OUTLINE
Printed in the USA© 1999 Toko, Inc.
All Rights Reserved
TOKO AMERICA REGIONAL OFFICES
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864
IC-215-TK112B
0798O0.0K
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.
SOT-89 (SOT 89-5)
Western Regional Office
Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
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
This Material Copyrighted By Its Respective Manufacturer