TK112xxCM/U
GC3-H026H Page 1
APPLICATION MANUAL
LDO REGULATOR WITH ON/OFF SWITCH
TK112xxCM/U
TK112xxCM/U
GC3-H026H Page 2
Features
· Very low Dropout Voltage. (Vdrop=105mV at 100mA)
· Very good stability (CL=0.1mF is stable for any type capacitor with 2.5V £ Vout)
· High Precision output Voltage (±1.5% or ±50mV)
· Good ripple rejection ratio (80dB at 1kHz)
· Wide operating voltage range (1.8V ~ 14.5V)
· Peak output current is 480mA.(10% down point)
· Built-in Short circuit protection
· Built-in Thermal Shutdown
· Suitable for Very Low Noise Applications
· Built-in on/off Control (0.1mA Max Standby current) High On
· Very Small Surface Mount Packages SOT23L / SOT89 package
· Built-in reverse bias over current protection
Description
The TK112xxC is an integrated circuit with a silicon monolithic bipolar structure. The regulator is of the low saturation
voltage output type with very little quiescent current (65mA).
The PNP power transistor is built-in. The I/O voltage difference is 0.17V (typical) when a current of 200mA is supplied
to the system. Because of the low voltage drop, the voltage source can be effectively used; this makes it very suitable for
battery powered equipment.
The on/off function is built into the IC. The current during standby mode becomes very small (pA level).
The output voltage is available from 1.5 to 10.0V in 0.1V steps. The output voltage is trimmed with high accuracy. This
allows the optimum voltage to be selected for the equipment.
The over current sensor circuit and the reverse-bias protection circuit are built-in.
It is a very rugged design because the ESD protection is high. Therefore, the TK112xxC can be used with confidence.
When mounted on the PCB, the power dissipation rating becomes about 600mW/ 900mW, even though the packages are
very small.
The TK112xxC features very high stability in both DC and AC.
The capacitor on the output side provides stable operation with 0.1mF with 2.5V £ Vout. A capacitor of any type can be
used; however, the larger this capacitor is, the better the overall characteristics are.
TK112xxCM/U
GC3-H026H Page 3
ORDERING INFORMATION
Voltage Code
(Refer to the following table)
Package Code
M : SOT23L-6
U : SOT89-5
Tape / Reel Code
L : Left Type (SOT23L-6)
B : Back Type (SOT89-5)
Environment Code
-GH : Lead Free and Halogen Free (SOT23L-6)
-G : Lead Free (SOT89-5)
T K 1 1 2 C -
Version
C
Rank Code
C : C Rank
I : I Rank
Voltage Code
V OUT V CODE
V OUT V CODE
V OUT V CODE
V OUT V CODE
1.5 15 2.5 25 3.5 35 4.5 45
1.6 16 2.6 26 3.6 36 4.6 46
1.7 17 2.7 27 3.7 37 4.7 47
1.8 18 2.8 28 3.8 38 4.8 48
1.9 19 2.9 29 3.9 39 4.9 49
2.0 20 3.0 30 4.0 40 5.0 50
2.1 21 3.1 31 4.1 41
2.2 22 3.2 32 4.2 42
2.3 23 3.3 33 4.3 43
2.4 24 3.4 34 4.4 44
TK112xxCM/U
GC3-H026H Page 4
Absolute Maximum Ratings
Ta=25°C
Parameter Symbol Rating Units Conditions
Absolute Maximum Ratings
Supply Voltage VccMAX -0.4 ~ 16 V
-0.4 ~ 6 V Vout £ 2.0V
Reverse Bias VrevMAX -0.4 ~ 12 V 2.1V £ Vout
Np pin Voltage VnpMAX -0.4 ~ 5 V
Control pin Voltage VcontMAX
-0.4 ~ 16 V
Storage Temperature Range Tstg -55 ~ 150 °C
Power Dissipation PD SOT23L-6: 600
SOT89-5: 900 mW Internal Limited Tj=150°C *
Operating Condition
Operating Temperature Range TOP -40 ~ 85 °C
2.1 ~ 14.5 V TOP =-40 ~ 85°C
Operating Voltage Range VOP 1.8 ~ 14.5 V TOP =-30 ~ 80°C
Short Circuit Current Ishort 500 mA
* PD must be decreased at rate of 4.8mW/°C(SOT23L-6), 7.2mW/°C(SOT89-5) for operation above 25°C.
The maximum ratings are the absolute limitation values with the possibility of the IC being damaged.
If the operation exceeds any of these standards, quality cannot be guaranteed.
TK112xxCM/U
GC3-H026H Page 5
Electrical Characteristics
(1) C rank
The operation between -40 ~ 85°C is guaranteed by design. The parameter with limit value will be guaranteed
with test when manufacturing or SQC (Statistical Quality Control) technique.
Vin=VoutTYP+1V,Vcont=1.8V,Ta=25°C
Value
Parameter Symbol
MIN TYP MAX Units
Conditions
Output Voltage Vout Refer to TABLE 1 V Iout = 5mA
Line Regulation LinReg - 0.0 6.0 mV
DVin = 5V
Load Regulation LoaReg Refer to TABLE 1 mV
Iout = 5mA ~ 100mA
Refer to TABLE 1 mV
Iout = 5mA ~ 200mA
Refer to TABLE 1 mV
Iout = 5mA ~ 300mA
Dropout Voltage *1 Vdrop - 105 170 mV
Iout = 100mA
- 170 270 mV
Iout = 200mA
- 235 370 mV
Iout = 270mA (2.1V £ Vout £ 2.3V)
- 235 370 mV
Iout = 300mA (2.4V £ Vout)
Maximum Output Current *2
IoutMAX 380 480 - mA
When (VoutTYP´0.9)
Supply Current Iq - 65 90 mA Iout = 0mA
Standby Current Istandby - 0.0 0.1 mA Vcont = 0V
Quiescent Current Ignd - 1.8 3.0 mA
Iout = 100mA
Control Terminal
Control Current Icont - 5.0 10 mA Vcont = 1.8V
Control Voltage Vcont 1.8 - - V Vout ON state
- - 0.35 V Vout OFF state
TOP=-40~85°C
1.6 - - V Vout ON state
- - 0.6 V Vout OFF state
TOP=-30~80°C
*1: For Vout £ 2.0V , no regulations.
*2: The maximum output current is limited by power dissipation.
TK112xxCM/U
GC3-H026H Page 6
TABLE 1. Output Voltage , Load Regulation
Load Regulation
Output Voltage Iout = 100mA Iout = 200mA Iout = 300mA
MIN TYP MAX TYP MAX TYP MAX TYP MAX
Part Number
V V V mV mV mV mV mV mV
TK11213C 1.250 1.300 1.350 11 24 21 49 34 77
TK11214C 1.350 1.400 1.450 11 24 22 49 34 78
TK11215C 1.450 1.500 1.550 11 24 22 50 35 79
TK11216C 1.550 1.600 1.650 11 24 22 50 35 80
TK11217C 1.650 1.700 1.750 11 25 22 51 36 82
TK11218C 1.750 1.800 1.850 11 25 23 51 36 83
TK11219C 1.850 1.900 1.950 11 25 23 52 37 84
TK11220C 1.950 2.000 2.050 11 25 23 53 37 85
TK11221C 2.050 2.100 2.150 11 26 23 53 38 86
TK11222C 2.150 2.200 2.250 12 26 24 54 38 88
TK11223C 2.250 2.300 2.350 12 26 24 54 39 89
TK11224C 2.350 2.400 2.450 12 26 24 55 39 90
TK11225C 2.450 2.500 2.550 12 27 24 55 40 91
TK11226C 2.550 2.600 2.650 12 27 25 56 40 92
TK11227C 2.650 2.700 2.750 12 27 25 56 41 93
TK11228C 2.750 2.800 2.850 12 27 25 57 41 95
TK11229C 2.850 2.900 2.950 12 27 25 58 42 96
TK11230C 2.950 3.000 3.050 12 28 26 58 42 97
TK11231C 3.050 3.100 3.150 12 28 26 59 43 98
TK11232C 3.150 3.200 3.250 12 28 26 59 44 99
TK11233C 3.250 3.300 3.350 13 28 26 60 44 101
TK11234C 3.349 3.400 3.451 13 29 27 60 45 102
TK11235C 3.447 3.500 3.553 13 29 27 61 45 103
TK11236C 3.546 3.600 3.654 13 29 27 62 46 104
TK11237C 3.644 3.700 3.756 13 29 27 62 46 105
TK11238C 3.743 3.800 3.857 13 29 28 63 47 107
TK11239C 3.841 3.900 3.959 13 30 28 63 47 108
TK11240C 3.940 4.000 4.060 13 30 28 64 48 109
TK11241C 4.038 4.100 4.162 13 30 28 64 48 110
TK11242C 4.137 4.200 4.263 13 30 29 65 49 111
TK11243C 4.235 4.300 4.365 14 31 29 66 49 112
TK11244C 4.334 4.400 4.466 14 31 29 66 50 114
TK11245C 4.432 4.500 4.568 14 31 29 67 50 115
TK11246C 4.531 4.600 4.669 14 31 30 67 51 116
TK11247C 4.629 4.700 4.771 14 31 30 68 51 117
TK11248C 4.728 4.800 4.872 14 32 30 68 52 118
TK11249C 4.826 4.900 4.974 14 32 30 69 52 120
TK11250C 4.925 5.000 5.075 14 32 31 70 53 121
TK112xxCM/U
GC3-H026H Page 7
TABLE 1. Output Voltage , Load Regulation (continue)
Load Regulation
Output Voltage Iout = 100mA Iout = 200mA Iout = 300mA
MIN TYP MAX TYP MAX TYP MAX TYP MAX
Part Number
V V V mV mV mV mV mV mV
TK11251C 5.023 5.100 5.177 14 32 31 70 53 121
TK11253C 5.220 5.300 5.380 15 33 31 71 54 124
TK11254C 5.319 5.400 5.481 15 33 32 72 55 125
TK11255C 5.417 5.500 5.583 15 33 32 72 55 127
TK11260C 5.910 6.000 6.090 15 34 33 75 58 133
TK11280C 7.880 8.000 8.120 17 39 38 87 68 156
TK112xxCM/U
GC3-H026H Page 8
(2) I rank
The operation between -40 ~ 85°C is guaranteed with normal test. The parameter with limit value will be guaranteed
with test when manufacturing or SQC(Statistical Quality Control) technique.
Vin=VoutTYP+1V,Vcont=1.8V,Ta=-40 ~ 85°C
Value
Parameter Symbol
MIN TYP MAX Units
Conditions
Output Voltage Vout Refer to TABLE 1 V Iout = 5mA
Line Regulation LinReg 0.0 8.0 mV
DVin = 5V
Refer to TABLE 1 mV
Iout = 5mA ~ 100mA
Refer to TABLE 1 mV
Iout = 5mA ~ 200mA
Load Regulation LoaReg
Refer to TABLE 1 mV
Iout = 5mA ~ 300mA
105 200 mV
Iout = 100mA (2.2V £ Vout)
170 320 mV
Iout = 200mA (2.2V £ Vout)
Dropout Voltage *1 Vdrop
235 440 mV
Iout = 300mA (2.4V £ Vout)
Maximum Output Current *2
IoutMAX 340 480 mA
When (VoutTYP´0.9)
Supply Current Iq 65 100 mA Iout = 0mA
Standby Current Istandby 0.0 0.5 mA Vcont = 0V
Quiescent Current Ignd 1.8 3.6 mA
Iout = 100mA
Control Terminal
Control Current Icont 5.0 12 mA Vcont = 1.8V
1.8 V Vout ON state Control Voltage Vcont
0.35 V Vout OFF state
*1: For Vout £ 2.1V , no regulations.
*2: The maximum output current is limited by power dissipation.
TK112xxCM/U
GC3-H026H Page 9
TABLE 1. Output Voltage , Load Regulation
Load Regulation
Output Voltage Iout = 100mA Iout = 200mA Iout = 300mA
MIN TYP MAX TYP MAX TYP MAX TYP MAX
Part Number
V V V mV mV mV mV mV mV
TK11213C 1.220 1.300 1.380 11 29 21 60 34 95
TK11214C 1.320 1.400 1.480 11 29 22 61 34 96
TK11215C 1.420 1.500 1.580 11 29 22 61 35 97
TK11216C 1.520 1.600 1.680 11 29 22 62 35 98
TK11217C 1.620 1.700 1.780 11 30 22 63 36 100
TK11218C 1.720 1.800 1.880 11 30 23 63 36 118
TK11219C 1.820 1.900 1.980 11 30 23 64 37 120
TK11220C 1.920 2.000 2.080 11 30 23 65 37 122
TK11221C 2.020 2.100 2.180 11 31 23 65 38 124
TK11222C 2.120 2.200 2.280 12 31 24 66 38 126
TK11223C 2.220 2.300 2.380 12 31 24 67 39 127
TK11224C 2.320 2.400 2.480 12 31 24 68 39 129
TK11225C 2.420 2.500 2.580 12 31 24 68 40 131
TK11226C 2.520 2.600 2.680 12 32 25 69 40 133
TK11227C 2.620 2.700 2.780 12 32 25 70 41 135
TK11228C 2.720 2.800 2.880 12 32 25 70 41 137
TK11229C 2.820 2.900 2.980 12 32 25 71 42 139
TK11230C 2.920 3.000 3.080 12 33 26 72 42 141
TK11231C 3.020 3.100 3.180 12 33 26 73 43 143
TK11232C 3.120 3.200 3.280 12 33 26 73 44 145
TK11233C 3.217 3.300 3.383 13 33 26 74 44 147
TK11234C 3.315 3.400 3.485 13 33 27 75 45 149
TK11235C 3.412 3.500 3.588 13 34 27 75 45 151
TK11236C 3.510 3.600 3.690 13 34 27 76 46 153
TK11237C 3.607 3.700 3.793 13 34 27 77 46 155
TK11238C 3.705 3.800 3.895 13 34 28 77 47 157
TK11239C 3.802 3.900 3.998 13 34 28 78 47 159
TK11240C 3.900 4.000 4.100 13 35 28 79 48 161
TK11241C 3.997 4.100 4.203 13 35 28 80 48 162
TK11242C 4.095 4.200 4.305 13 35 29 80 49 164
TK11243C 4.192 4.300 4.408 14 35 29 81 49 166
TK11244C 4.290 4.400 4.510 14 36 29 82 50 168
TK11245C 4.387 4.500 4.613 14 36 29 82 50 170
TK11246C 4.485 4.600 4.715 14 36 30 83 51 172
TK11247C 4.582 4.700 4.818 14 36 30 84 51 174
TK11248C 4.680 4.800 4.920 14 36 30 84 52 176
TK11249C 4.777 4.900 5.023 14 37 30 85 52 178
TK11250C 4.875 5.000 5.125 14 37 31 86 53 180
TK112xxCM/U
GC3-H026H Page 10
TABLE 1. Output Voltage , Load Regulation (continue)
Load Regulation
Output Voltage Iout = 100mA Iout = 200mA Iout = 300mA
MIN TYP MAX TYP MAX TYP MAX TYP MAX
Part Number
V V V mV mV mV mV mV mV
TK11255C 5.362 5.500 5.638 15 38 32 89 55 190
TK11257C 5.557 5.700 5.843 15 38 32 91 56 194
TK11260C 5.850 6.000 6.150 15 39 33 93 58 199
TK11280C 7.800 8.000 8.200 17 43 38 107 68 238
TK112xxCM/U
GC3-H026H Page 11
Application
Block Diagram
Pin Layout Top view
GND
Bandgap
Reference
Cont.
Vin
Vout
Constant
Current
Source
Control Circuit
Thermal &
Over Current Protect
Np
500k
Iin
V
CL=0.22
m
F
(CL=1.0mF)
Iout
A
Icont
Vcont
A
Cin=0.1
m
F
Cnp=0.1
m
F
Vin
Cont.
Vin
Vout
GND
Np
GND
Vin Vout
on/off
ControlGND Np(Vref)
6 4
123
SOT-23L
5
GND
6 4
123
SOT89
5
GNDVout Vin
Np(Vref) GND on/off
Control
TK112xxCM/U
GC3-H026H Page 12
Input /Output Capacitors
Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. If a 0.1mF capacitor is connected to
the output side, the IC provides stable operation at any voltage in the practical current region. However, increase the CL capacitance when
using the IC in the low current region and low voltage. Otherwise, the IC oscillates.
The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is recommended to use as
large a value of capacitance as is practical. The output noise and the ripple noise decrease as the capacitance value increases. ESR values
vary widely between ceramic and tantalum capacitors. However, tantalum capacitors are assumed to provide more ESR damping resistance,
which provides greater circuit stability. This implies that a higher level of circuit stability can be obtained by using tantalum capacitors
when compared to ceramic capacitors with similar values.
The input capacitor is necessary when the battery is discharged, the power supply impedance
increases, or the line distance to the power supply is long.
This capacitor might be necessary on each individual IC even if two or more regulator ICs are used. It is not possible to determine this
indiscriminately. Please confirm the stability while mounted. The IC provides stable operation with an output side capacitor of 0.1mF
(Vout ³ 2.5V). If it is 0.1mF or more over the full range of temperature, either a ceramic capacitor or tantalum capacitor can be used
without considering ESR. It is not possible to say indiscriminately. Please confirm stability while mounted.
Output voltage, Output current vs. Stable Operation Area
The above graphs show stable operation with a ceramic capacitor of 0.1uF (excluding the low current region). If the capacitance is not
increased in the low voltage, low current area, stable operation may not be achieved. Please select the best output capacitor according to
the voltage and current used. The stability of the regulator improves if a big output side capacitor is used (the stable operation area
extends.) Please use as large a capacitance as is practical. Although operation above 150 mA has not been described, stability is equal to or
better than operation at 150 mA.
Generally, a ceramic capacitor has both a
temperature characteristic and a voltage
characteristic. Please consider both
characteristics when selecting the part. The
B curves are the recommend characteristics.
For evaluation Kyocera :CM05B104K10AB , CM05B224K10AB , CM105B104K16A , CM105B224K16A , CM21B225K10A
Murata :GRM36B104K10 , GRM42B104K10 , GRM39B104K25 , GRM39B224K10 , GRM39B105K6.3
Iout [mA]
CL³0.33mF All Stable
Iout [mA]
CL³0.33mF All Stable
Iout [mA]
CL³0.68mF All Stable
Iout [mA]
CL³1.0mF All Stable
Iout [mA]
CL³2.2mF All Stable
0.01
0.1
1
10
100
0.5
50
100
150
ESR[
W
]
Vout=5.0V
0.01
0.1
1
10
100
150
0.5
50
100
ESR [
W
]
Vout=4.0V
Stable Area
CL=0.068mF
Vout=2.5V, 3.0V
0.01
0.1
1
10
100
0.5
50
100
150
ESR[
W
]
Stable Area
CL=0.068mF
Vout=1.8V , 2.2V
0.01
0.1
1
10
100
2.0
50
100
150
ESR[
W
]
Vout=1.5V
0.01
0.1
1
10
100
4.0
50
100
150
ESR [
W
]
Stable Area
CL=0.1 mF
Stable Area
CL=0.068mF
Stable Area
CL=0.068mF
The recommended value : Cin=CL=0.22mF(MLCC) Iout ³ 0.5mA.
Cin=0.22
m
F
~ 0.1mF
Vout
CL=0.22
m
F
~ 0.1mF
%
Capacitance vs. Voltage
0 Bias voltage(V)
CAP
2 4
6 8 10
50
60
70
80
90
100
B Curve
F Curve
Capacitance vs. Temperature
%
60
50
80
90
100
70
CAP
-50
-25
0
25
50
75
100
Ta(
°
C)
B Curve
F Curve
TK112xxCM/U
GC3-H026H Page 13
Output noise
Increase Cnp to decrease the noise. The recommended Cnp capacitance is 6800pF(682) ~ 0.22mF(224).
The amount of noise increases with the higher output voltages.
TK11230C Cnp vs. Noise Iout=30mA BPF=400Hz
~
80kHz
TK11230CM Cin=10
m
F Iout=10mA
TK11230C Cnp vs Noise
Cnp（ｐF）
Noise
（
m
Vrms)
0
50
100
150
200
250
300
1
10
100
1000
10000
100000
CL=0.22
m
F
CL=0.47
m
F
CL=1.0
m
F
CL=2.2
m
F
CL=10
m
F
Iout=30mA BPF:400
~
80kHz
CL=Tantal
CL=MLCC
TK11230C Iout vs Noise
35
40
45
50
55
60
65
70
75
80
85
90
95
0
50
100
150
200
250
300
Iout(mA)
Noise(
m
Vrms)
Cnp=10000pF BPF:400
~
80kHz
CL=Tantal
CL=0.22uF
CL=0.47uF
CL=1.0uF
CL=2.2uF
CL=10uF
TK11230C Iout vs. Noise
35
40
45
50
55
60
65
70
75
80
85
90
95
0
50
100
150
200
250
300
Iout(mA)
Noise(
m
Vrms)
Cnp=10000pF BPF:400
~
80kHz
CL=MLCC
CL=0.22uF
CL=0.47uF
CL=1.0uF
CL=2.2uF
CL=10uF
Noise Level(1/f)
0.01
0.1
1
10
10
100
1k
10k
100k
Frequency(Hz)
Noise(
m
V/
Ö
Hz)
CL=0.22mF（Ceramic)
Cnp=0.01
m
F
Cnp=0.1
m
F
Cnp=1000pF
Noise
(mVrms)
TK112xxC Vout vs Noise
10
20
30
40
50
60
70
80
90
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Vout(V)
Iout=30mA Cnp=10000pF CL=0.22
m
F(MLCC)
BPF:400
~
80kHz
TK112xxCM/U
GC3-H026H Page 14
Ripple rejection
The ripple rejection characteristic depends on the characteristic and the capacitance value of the capacitor connected to the output side.
The RR characteristic of 50KHz or more varies greatly with the capacitor on the output side and PCB pattern. If necessary, please
confirm stability while operating.
CL
GND
112XX
Vout
Vin
Cnp
0.1mF
Vcont
CL=1 uF (Tantal)
CL=1uF (MLCC)
CL=0.22uF (MLCC)
CL=0.22 uF
(Tantal)
A : Cref=0.1uF
B : Cref=0.001uF
Vin=5.0V Vout=3.0V Iout=10mA
VR=500mVp-p f=100 ~ 1MHz Cnp=0.1uF
A : CL=10uF (Tantal)
B : CL=0.22uF (Tantal)
Ripple Rejection vs. Iout
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0
50
100
150
200
250
300
Iout(mA)
R.R(dB)
Cnp=0.01
μ
F
CL=0.22
μ
F
（
Ceramic)
Vin=5.0V
Vripple=500mVp
-
p
Freq=1kHz
Freq=400Hz
Ripple Rejection at Low Vin
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Vin-Vout_Typ(V)
R.R (dB)
Without Cin Vripple:100mVp-p Freq:1kHz Cnp:0.01μF
CL:0.22μF
（
Ceramic)
Iout :1, 50, 100, 150, 200, 250, 300mA
TK112xxCM/U
GC3-H026H Page 15
TK112xxC Transient
· ON / OFF Transient
112xxC
Cnp
CL
Iout=30mA
Cin
1
m
F
Vin
=Vout
TYP
+1V
1 3
6 4
Vcont=0V
Û
2V
(f=100Hz)
CL= Variable Cnp=0.001mF CL= Variable Cnp=0.01mF
Cnp= Variable CL=1mF CL= Variable Cnp=0.01mF Io=30mA
The rise time of the regulator depends on CL and Cnp; the fall time depends on CL.
1.0V/div
250ms/div
Vout
Vcont OFF
ON
Cnp=
0.001mF
0.1
m
F
0.01
m
F
1.0V/div
10ms/div
Vout
Vcont OFF
ON
CL=
0.22
m
F
2.2
m
F
1.0
m
F
1.0
m
F , 2.2
m
F
1.0V/div
50ms/div
Vout
Vcont OFF
ON
CL=
0.22
m
F
1.0V/div
250ms/div
Vout
Vcont OFF
ON
1.0
m
F
2.2
m
F
CL=
0.22
m
F
TK112xxCM/U
GC3-H026H Page 16
· LOAD Transient
112xxC
Cnp
CLCin
1
m
F
Vcont
1.8V
Vin
=Vout
TYP
+1V
1 3
6 4 Iout
ON
Û
OFF
0.01
m
F
When the capacitor on the load side is increased, the load change becomes smaller.
The no load voltage change can be greatly improved by delivering a little
load current to ground (see right curve above).
Increase the load side capacitor when the load change is fast or when there is a large current change. In addition, at no load, the voltage
change can be reduced by delivering a little load current to ground.
· Line Transient
Vout
Iout 3mA
33mA
3mA
33mA
CL=1.0
m
F 2.2
m
F
CL=0.22
m
F
CL= Variable Cnp=0.01
m
F
Vout
Vin
D
1V
CL=0.22
m
F
CL=1.0
m
F
CL=2.2
m
F
CL= Variable Cnp=0.01
m
F
Vout
Vin
D
1V
Cnp=0.001
m
F
Cnp=0.01
m
F
Cnp=0.1
m
F
Cnp= Variable CL=1
m
F
Vout
Iout
33mA 30mA
3mA 0mA
30mA 33mA
0mA 3mA
Iout=0
Û
30mA
Iout=3
Û
33mA
Iout=0
Û
30mA , 3
Û
33mA
Vout
Iout
Iout=0
Û
30mA
Iout=3
Û
33mA
Magnification
TK112xxCM/U
GC3-H026H Page 17
Load regulation
0
50
100
150
200
250
300
Iout(mA)
D
Vout(mV)
Vo=3.0V
-
80
-
70
-
60
-
50
-
40
-
30
-
10
0
10
-20
Vo=2.0V
Vo=5.0V
-
35
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
0
5
10
15
20
Vin(V)
D
Vout(mV)
Vo1.5V
Vo2.0V
Vo3.0V
Vo4.0V
Vo5.0V
Line regulation
Vdrop
-500
-450
-400
-350
-300
-250
-200
-150
-100
-50
0
0
100
200
300
400
500
Iout(mA)
Vdrop(mV)
Regulation point
100
D
Vin(mV)
-300
-200
-100
0.0
100
D
Vout(mV)
Iout=300mA
Iout=0mA
Iout=0mA,50mA,100mA,150mA,200mA,250mA,300mA
Vcont vs. Icont
0
5
10
15
20
0.0
1.0
2.0
3.0
4.0
5.0
Vcont(V)
Icont(
m
A)
Icont
Vout
TK112xxCM/U
GC3-H026H Page 18
Standby current
1.E-12
1.E-11
1.E-10
1.E-09
1.E-08
1.E-07
1.E-06
1.E-05
1.E-04
0
2
4
6
8
10
12
14
16
18
20
Vin(V)
Istandby(A)
Short circuit current
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
100
200
300
400
500
Iout(mA)
Vout(V)
GND current
0
1
2
3
4
5
6
7
8
9
10
11
12
0
50
100
150
200
250
300
Iout(mA)
Ignd(mA)
Vo1.5V
Vo2.0V
Vo3.0V
Vo4.0V
Vo5.0V
Reverse bias current
0
10
20
30
40
50
60
0
1
2
3
4
5
6
7
8
9
10
Vrev(V)
Irev(
m
A)
Vout=5V
Vout=2V
Vout
=4V
Vout=3V
IoutMax(mA)
IoutMax at low Vop
TK11215 ~ TK11224
0
50
100
150
200
250
300
350
400
450
500
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
Vop（V)
TK112xxCM/U
GC3-H026H Page 19
Temperature Characteristics (Ta: Ambient temperature)
Iout (mA)
Max Iout
340
360
380
400
420
440
460
480
500
-50 -25 0
25
50
75
100
Ta(
°
C)
Vout=(VoutTyp.
´
0.9
GND current
Ignd(mA)
I
o
=300mA
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
-50
-25
0
25
50
75
100
Ta(
°
C)
Io=50mA
Io=100mA
Io=150mA
Io=200mA
on/off point
Vcont(V)
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
-50
-25
0
25
50
75
100
Ta(
°
C)
Vcont(ONpoint)
Vcont(OFFpoint)
Control current
Icont(
m
A)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
-50
-25
0
25
50
75
100
Ta(
°
C
)
Vcont=1.8V
Vcont=4.0V
Vcont=2.0V
Vcont=3.0V
Dropout voltae
Vdrop(mV)
-
50
-
25
0
25
50
75
100
Ta(
°
C
)
0
50
100
150
200
250
300
350
Io=
300
mA
Io=100mA
Io=
150
mA
Io=200mA
Io=50mA
150
200
250
300
350
400
450
500
550
-50
-25
0
25
50
75
100
Ta(
°
C
)
IoutMAX(mA)
Vin=1.9/2.0/2.1/2.2/2.3/2.4/2.5V
Output current
V
in
=
1.9
V
Vin=2.2V
Vin=2.0V
Vin=2.1V
TK112xxCM/U
GC3-H026H Page 20
Output voltage vs. Temperature characteristics
-
35
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
-
50
-
25
0
25
50
75
100
Ta(
℃
)
D
Vout(mV) Vout=3.0V
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
-50
-25
0
25
50
75
100
Ta(
°
C
)
D
Vout(mV)
Vout=2.0V
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
DVout(mV)
Vout=4.0V
-
50
-
25
0
25
50
75
100
Ta(
℃
)
DVout(mV) Vout=1.5V
-
50
-
25
0
25
50
75
100
Ta(
°
C
)
-
35
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
D
Vout(mV), Vout=5.0V
-
50
-
25
0
25
50
75
100
Ta(
℃
)
-
35
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
TK112xxCM/U
GC3-H026H Page 21
Layout PCB Material : Glass epoxy t=0.8mm
SOT-23L SOT-89 Derating Curve
The package loss is limited at the temperature that the internal temperature sensor works (about 150°C). Therefore, the
package loss is assumed to be an internal limitation. There is no heat radiation characteristic of the package unit assumed
because of the small size. Heat is carried away by the device being installed on the PCB. This value changes by the
material and the copper pattern etc. of the PCB. The losses are approximately 600mW (SOT-23L) : 900mW(SOT-89).
Enduring these losses becomes possible in a lot of applications operating at 25°C.
Determining the thermal resistance when mounted on a PCB.
The operating chip junction temperature is shown by
Tj=qja ´ Pd + Ta. Tj of the IC is set to about 150°C.
Pd is a value when the overtemperature sensor is made to work.
Pd is easily obtained.
Mount the IC on the PCB. Pd becomes Vin ´ Iin when the output side of the IC is short-circuited.
The input current decreases gradually by the temperature rise of the chip.
Please use the value when the current is steady (thermal equilibrium is reached).
In many cases, heat radiation is good, and Pd becomes 600mW/900 mW or more.
Pd is obtained by the normal temperature in degrees. The current that can be used at the highest operating temperature is
obtained from the graph of the figure below.
Procedure (Do when PCB mounted).
1. Pd is obtained (Vin ´ Iin when the output side is short-circuited).
2. Pd is plotted on the horizontal line to 25°C.
3. Pd is connected with the point of 150°C by the straight line
(bold face line).
4. A line is extended vertically above the point of use temperature in the design. For
instance, 75°C is assumed (broken line).
5. Extend the intersection of the derating curve (fat solid line) and (broken line) to the
left and read the Pd value.
6. DPd ¸ (Vinmax - Vout)=Iout (at 75°C)
The maximum current that can be used at the highest operating temperature is:
Iout @ DPd ¸ (Vinmax - Vout).
Please do derating with 4mW/°
C at
Pd=500mW and 25°
C or more. Thermal
resistance is (qja=250°C / W).
Vout
On/of
Vin
Please do derating with 7.2mW/°C at
Pd=900mW and 25°
C or more. Thermal
resistance is ( qja=138°C / W)
600
SOT-89
-7.2mW/°C
25
50
°
C 100
150
0
Pd(mW)
(85)
°
C
900
SOT-23- L
-
4
.
8
mW/
°
C
0
on/off
Vin
Vout
Ta (Ta=25°C)
150 = qja ´ pd + 25
qja ´ Pd = 125
qja = (125/ pd) (°C / mW)
Pd(mW)
25
50
100 150
°
C
0 (75)
DPd
Pd 2
3
4
5
TK112xxCM/U
GC3-H026H Page 22
Application hint
On/Off Control
It is recommended to turn the regulator Off when the circuit following
the regulator is non-operating. A design with little electric power loss
can be implemented. We recommend the use of the on/off control of the
regulator without using a high side switch to provide an output from the
regulator. A highly accurate output voltage with low voltage drop is
obtained.
Because the control current is small, it is possible to control it directly by CMOS logic.
The PULLDOWN resistance (500KW) is built into the control terminal.
The noise and the ripple rejection characteristics depend on the capacitance on the Vref terminal.
The ripple rejection characteristic of the low frequency region improves by increasing the capacitance of Cnp.
A standard value is Cnp=0.068mF. Increase Cnp in a design with important output noise and ripple rejection
requirements. The IC will not be damaged if the capacitor value is increased.
The on/off switching speed changes depending on the Np terminal capacitance. The switching speed slows when
the capacitance is large.
Parallel connected ON/OFF Control
The figure at the left illustrates multiple regulators being controlled
by a single On/Off control signal. There is
a possibility of
overheating because the power loss of the
low voltage side IC
(TK11220C) is large. The series resistor (R)
is put in the input
line of the low output voltage regulator in order to prevent over-
dissipation. The voltage dropped acr
oss the resistor reduces the
large input-to-
output voltage across the regulator, reducing the
power dissipation in the device.
When the thermal sensor works, a
decrease of the output voltage, oscillation, etc.
may be
observed.
2.0V
5V
3.3V
On/Off Cont.
Vin TK11250C
TK11233C
TK11220C
R
REG
VsatO
P
On/Off Cont.
TK112xxCM/U
GC3-H026H Page 23
Definition of Terms
The output voltage tables are specified with a test voltage of Vin=Output Voltage (Typ.) + 1V.
Output Voltage ( Vout )
The output voltage is specified with (Vin = Output Voltage (Typ.) + 1V) and output current (Iout=5mA).
Maximum Output Current ( Iout Max )
The output current is measured when the output voltage decreases to (VoutTyp. x 0.9). The input voltage is (Output
Voltage (Typ.) + 1V). The maximum output current is measured in a short time so that it is not influenced by
the temperature of the chip. The output current decreases with low voltage operation.
Please refer to the "Low input voltage-output current" graph for 2.1V or less.
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 (Iout) and the junction temperature (Tj). The input voltage is gradually
decreased below the test voltage. It is the voltage difference between the input and the output when the output
voltage decreases by 100mV.
Line Regulation ( Lin 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 (Output Voltage (Typ.) + 1V) to (Output
Voltage (Typ.) + 6V). This measurement is not influenced by the temperature of the IC and is measured in a
short time.
Load Regulation ( Load Reg )
Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. The
input voltage is set to (Output Voltage (Typ.) + 1V). The output voltage change is measured as the load current
changes from to 5 to 100mA and from 5 to 200mA. This measurement is not influenced by the temperature of
the IC and is measured in a short time.
Quiescent Current ( Iq )
The quiescent current is the current which flows through the ground terminal under no load conditions (Io=0mA).
Ripple Rejection ( 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 the input voltage = ( Vout + 1.5V ) , Iout=10mA, CL=1.0mF and Cnp=0.01mF An Alternating
Current source of (f=1kHz and 200mVRMS) is superimposed to the power-supply voltage. Ripple rejection is
the ratio of the ripple content of the output vs. the input and is expressed in dB. It is typically about 80dB at
1KHz. The ripple rejection improves when the value of the capacitor at the noise bypass terminal in the circuit
is large. However, the on/off response worsens.
Standby Current.( Istandby )
Standby current is the current which flows into the regulator when the control voltage is made 0 volts. It is
measured with an input voltage of 8V.
TK112xxCM/U
GC3-H026H Page 24
PROTECTION CIRCUITS
Thermal Sensor
The thermal sensor protects the device if the junction temperature exceeds the safe value (Tj=150 °C). This
temperature rise can be caused by extreme heat, excessive power dissipation caused by large output voltage drops,
or excessive output current. The regulator will shut off when the temperature exceeds the safe value. As the
junction temperature decreases, the regulator will begin to operate again. Under sustained fault conditions, the
regulator output will oscillate as the device turns off then resets. Please improve heat radiation or lower the input
electric power. When heat radiation is poor, the forecast package loss is not obtained.
* In the case that the power, Vin ´ Ishort(Short Circuit Current), becomes more than twice of the maximum rating of its power dissipation in a moment,
there is a possibility that the IC is destroyed before internal thermal protection works.
Reverse Bias Current
The reverse bias protection prevents excessive current from flowing through the
IC even if the input voltage becomes 0 with voltage impressed on the
output side (input short-circuited to GND). The maximum reverse bias
voltage is 6V.
· ESD .......... MM 200pF 0W 200V Min
HBM 100pF 1.5kW 2000V Min
Vout
Vin
GND
TK112xxCM/U
GC3-H026H Page 25
Outline ; PCB ; Stamps
SOT23L-6
Unit : mm
General tolerance : ± 0.2
TK112xxCM/U
GC3-H026H Page 26
SOT89-5
1.0
1.0
2.5
±
0.2
4.5
+0.5
-
0.3
0.44Max
VOLTAGE
CODE
0.49Max
0.49Max 0.49Max
1.6
4.5
± 0.2
0.49
Max
0.49Max
0.54Max
1.0
2.5
±
0.2
0.4
X X
LOT No
TYPE CODE
R:112XX
0.7Max
1.0
0.7Max
1.5
1.5
2.0
1.5
0.7
0.8
1.5
0.7
45°
Recommended Mount Pad
e
e
1.5
±
0.2
1.5 1.5
3.0
e
e
e'
Unit : mm
General tolerance : ± 0.2
TK112xxCM/U
GC3-H026H Page 27
1. NOTES
Please be sure that you carefully discuss your planned
purchase with our office if you intend to use the products in
this application manual under conditions where particularly
extreme standards of reliability are required, or if you intend
to use products for applications other than those listed in this
application manual.
Power drive products for automobile, ship or aircraft
transport systems; steering and navigation systems,
emergency signal communications systems, and any
system other than those mentioned above which include
electronic sensors, measuring, or display devices, and
which could cause major damage to life, limb or property
if misused or failure to function.
Medical devices for measuring blood pressure, pulse,
etc., treatment units such as coronary pacemakers and heat
treatment units, and devices such as artificial organs and
artificial limb systems which augment physiological
functions.
Electrical instruments, equipment or systems used in
disaster or crime prevention.
Semiconductors, by nature, may fail or malfunction in
spite of our devotion to improve product quality and
reliability. We urge you to take every possible precaution
against physical injuries, fire or other damages which may
cause failure of our semiconductor products by taking
appropriate measures, including a reasonable safety margin,
malfunction preventive practices and fire-proofing when
designing your products.
This application manual is effective from Aug. 2010. Note
that the contents are subject to change or discontinuation
without notice. When placing orders, please confirm
specifications and delivery condition in writing.
ASAHI KASEI TOKO POWER DEVICES is not
responsible for any problems nor for any infringement of
third party patents or any other intellectual property rights
that may arise from the use or method of use of the products
listed in this application manual. Moreover, this application
manual does not signify that ASAHI KASEI TOKO
POWER DEVICES agrees implicitly or explicitly to license
any patent rights or other intellectual property rights which it
holds.
None of the ozone depleting substances(ODS) under the
Montreal Protocol are used in our manufacturing process.
2. OFFICES
If you need more information on this product and other
ASAHI KASEI TOKO POWER DEVICES products, please
contact us.
ASAHI KASEI TOKO POWER DEVICES CORPORATION
13-45, Senzui 3-chome, Asaka-shi, Saitama-ken
351-0024, Japan
TEL: +81-48-460-1870 (Marketing Department)
FAX: +81-48-460-1600
YOUR DISTRIBUTOR
