TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 2

Features

Very low Dropout Voltage. (Vdrop=105mV at 100mA)

Very good stability (CL=0.1

F 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 (0.1

A 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 (65

A).

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 0.1

F with 2.5V

Vout. A capacitor of

any type can be used; however, the larger this capacitor is, the better the overall characteristics are.

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 3

Boldface type

applies Standard Voltage.

V OUT

V CODE

V OUT

V CODE

V OUT

V CODE

V OUT

V CODE

1.5 v

2.5 v

3.5 v

4.5 v

1.6

2.6

3.6

4.6

1.7

2.7

3.7

4.7

1.8

2.8

3.8

4.8

1.9

2.9

3.9

4.9

2.0

3.0

4.0

5.0

2.1

3.1

4.1

2.2

3.2

4.2

2.3

3.3

4.3

2.4

3.4

4.4

Please contact your authorized Toko representative for voltage availability

Operating Temp. Range
C :-30

I :-40

Voltage Code

EX 3.3V : 33
5.0V : 50

Tape/Reel Code

L : SOT-23L

B : SOT89

Package Code

SOT23L

SOT89

ORDERING INFORMATION

T K 1 1 2

C M

(Special Sorting)

Noise

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 4

C rank device

Absolute maximum ratings

Parameters

Symbol

Limiting Values

Unit

Supply voltage

Vcc Max

0.4

Reverse bias

VrMax

0.4

Np pin voltage

VnpMax

0.4

Control pin voltage

VcontMax

0.4

Storage temperature Range

Tstg

150

Operating voltage range

Vop

1.8

14.5

Operating temperature range

Top

Short circuit current

Ishort

500

Power dissipation Internally limited

600mW mounted (reference) U

900mW mounted (reference)

Electrical characteristics

Test Condition Vtest=Vout

Typ

+1V

Vcont=1.8V

(Ta=25

Parameters

Symbol

Min

Typ

Max

Unit

Condition

Output voltage

Vout

1.5% or

50mV

Iout = 5mA

Line regulation

LinReg

V=5V

Vtest=Vout

Typ

+1V---- Vout

Typ

+6V

0.5

1.1

5mA

Iout

100mA

1.0

2.2

5mA

Iout

200mA

Load regulation

2.5V

5.0V

LoaReg

1.6

3.7

5mA

Iout

300mA

0.8

1.8

5mA

Iout

100mA

1.5

3.4

5mA

Iout

200mA

1.5V

2.4V

LoaReg

2.4

5.3

5mA

Iout

300mA

105

170

Iout=100mA

170

270

Iout=200mA

235

370

Iout=300mA (2.4V

Vout)

Vdrop

235

370

Iout=270mA (2.1V

Vout < 2.4V)

Dropout voltage

1.5V

Vout

2.0V

No regulation Because of Vop

Min

=1.8V

Maximum output

current

IoutMax

380

480

(

Vout

Typ

0.9)

Quiescent current

Iout=0mA Excluding Icont

Standby current

Istandby

0.1

Vcc=8V , Vcont

0.15V Off state

Ground pin current

Ignd

1.8

3.0

Iout=100mA

Control terminal Specification

(Pull down resistor = 500k) Note 1

Control current

Icont

Vcont=1.8V on state

1.6

on state

Control voltage

Vcont

0.6

off state

Np treminal Voltage

Vnp

1.28

Vo/Ta

Typ=35 ppm/

Reference Value

Out put noise

Vno

0.14

0.25

Hz at1KHz Reference Value

Note 1: The input current decreases to the pA level by connecting the control terminal to GND. (Off state). The

Pull-down resistor is 500k

General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality

Control (SQC) methods. Unless otherwise noted. Vtest=Vout

Typ

+1V

;

IL=1mA (Tj=25

) The

operation of

is guaranteed in the design by a usual inspection.

General Note: Exceeding the "Absolute Maximum Rating " may damage the device
General Note: Connecting a capacitor to the noise bypass pin can decrease the output noise voltage
General Note: Output noise is 0.14-0.25

Hz at 1KHz : 23

Vrms at BW400-80kHz

General Note: The ripple rejection is 84dB at 400Hz and 80dB at 1kHz.

[CL=1.0

F,Cnp=0.01

F,Vnois=200mV

RMS

,Vin=Vout

Typ

+1.5v,Iout=10mA]

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 5

I Rank

Absolute Maximum Ratings are same as C Rank
Operating Temperature Range Top=

Operating Voltage Range Vop=2.1V

14.5V

Other items are same as C rank.

Boldface type

applies over the full operating temperature range. (

Vtest=Vout

Typ

+1V Iout=5mA

Parameters

Symbol

Min

Typ

Max

Unit

Condition

Output Voltage

Vout

1.5% or

50mV

(

2.5% or

80mV)

Iout = 5mA

Line regulation

LinReg

V=5V

0.5

1.1

1.3

5mA

Iout

100mA

1.0

2.2

2.8

5mA

Iout

200mA

Load regulation

2.5V

5.0V

LoaReg

1.6

3.7

5.3

5mA

Iout

300mA

0.8

1.8

2.0

5mA

Iout

100mA

1.5

3.4

4.1

5mA

Iout

200mA

1.5V

2.4V

LoaReg

2.4

5.3

6.5

5mA

Iout

300mA

105

170

200

Iout=100mA

170

270

320

Iout=200mA

Vdrop

235

370

440

Iout=300mA (2.4V

Vout)

(2.2V,2.3V : No regulation)

Dropout voltage

1.5V

Vout

2.1V

No regulation Because of Vop

Min

=2.1V

Maximum output

current

IoutMax

380

340

480

Vout= (

Vout

Typ

0.9)

Quiescent current

100

Iout=0mA except Icont

Standby current

Istandby

0.1

0.5

Vcont

0.15V 0ff state

GND pin current

Ignd

1.8

3.0

3.6

Iout=100mA

Control terminal Specification

(Pull down resistor =500k ) Note 1

Control current

Icont

Vcont=1.8V on state

1.6

1.8

on state

Control voltage

Vcont

0. 6

0.35

off state

Np terminal Voltage

Vnp

1.28

Vo/Ta

Typ=35 ppm/

Reference Value

Out put noise

Vno

0.14

0.25

Hz at1KHz Reference Value

Note 1: The input current decreases to the pA level by connecting the control terminal to GND. (Off state). The

Pull-down resistor is 500 k

General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality

Control (SQC) methods. Unless otherwise noted. Vtest=Vout

Typ

+1V

;

IL=1mA (Tj=25

) The

operation of -30

-80

is guaranteed in the design by a usual inspection.

Hz at 1KHz : 23

Vrms at BW400-80kHz

General Note: The ripple rejection is 84dB at 400Hz and 80dB at 1kHz.

[CL=1.0

F,Cnp=0.01

F,Vnois=200mV

RMS

,Vin=Vout

Typ

+1.5v,Iout=10mA]

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 7

Input /Output Capacitors

Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. If a 0.1

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 0.1

F (Vout

2.5V). If it is 0.1

F 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]

0.33

F All Stable

Iout [mA]

0.33

F All Stable

Iout [mA]

0.68

F All Stable

Iout [mA]

1.0

F All Stable

Iout [mA]

2.2

F All Stable

0.01

0.1

100

0.5

100

150

ESR[

]

Vout=5.0V

0.01

0.1

100

150

0.5

100

ESR [

]

Vout=4.0V

Stable Area

CL=0.068

Vout=2.5V, 3.0V

0.01

0.1

100

0.5

100

150

ESR[

]

Stable Area

CL=0.068

Vout=1.8V , 2.2V

0.01

0.1

100

2.0

100

150

ESR[

]

Vout=1.5V

0.01

0.1

100

4.0

100

150

ESR [

]

Stable Area

CL=0.1

Stable Area

CL=0.068

Stable Area

CL=0.068

The recommended value : Cin=CL=0.22

F(MLCC) Iout

0.5mA.

Cin=0.22

0.1

Vout

CL=0.22

0.1

Capacitance vs. Voltage

Bias voltage(V)

CAP

100

B Curve

F Curve

Capacitance vs. Temperature

100

CAP

-50 -25

75 100

Ta(

B Curve

F Curve

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 8

Output noise

Increase Cnp to decrease the noise. The recommended Cnp capacitance is 6800pF(682) ~ 0.22

F(224).

The amount of noise increases with the higher output voltages.

TK11230C Cnp vs. Noise

Iout=30mA BPF=400Hz

80kHz

TK11230CM Cin=10

F Iout=10mA

TK11230C Cnp vs Noise

CnpF

Noise

Vrms)

100

150

200

250

300

100

1000

10000

100000

CL=0.22

CL=0.47

CL=1.0

CL=2.2

CL=10

Iout=30mA BPF:400

80kHz

CL=Tantal

CL=MLCC

TK11230C Iout vs Noise

100

150

200

250

300

Iout(mA)

Noise(

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

100

150

200

250

300

Iout(mA)

Noise(

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

100

10k

100k

Frequency

Hz)

Noise(

Hz)

CL=0.22

FCeramic)

Cnp=0.01

Cnp=0.1

Cnp=1000pF

Noise

(

Vrms)

TK112xxC Vout vs Noise

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

F(MLCC)

BPF:400

80kHz

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 9

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.

GND

112XX

Vout

Vin

Cnp

0.1

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

Ripple Rejection vs. Iout

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

100

150

200

250

300

Iout(mA)

R.R(dB)

Cnp=0.01

CL=0.22

FCeramic)

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 0.1 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)

Cin:None

Vripple=100mVp-p

Freq:1kHz
Cnp:0.01

F CL:0.22

F (Ceramic)

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)

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 10

TK112xxCM Transient

ON / OFF Transient

112xxC

Cnp

Iout=30mA

Cin

Vin
=Vout

TYP

+1V

Vcont=0V

(f=100Hz)

CL= Variable Cnp=0.001

CL= Variable Cnp=0.01

Cnp= Variable CL=1

CL= Variable Cnp=0.01

F Io=30mA

The rise time of the regulator depends on CL and Cnp; the fall time depends on CL.

1.0V/div

250

s/div

Vou

Vcont

OFF

Cnp=

0.001

0.1

0.01

1.0V/div

s/div

Vou

Vcont

OFF

CL=

0.22

2.2

1.0

F ,

2.2

1.0V/div

s/div

Vou

Vcont

OFF

CL=

0.22

1.0V/div

250

s/div

Vou

Vcont

OFF

1.0

2.2

CL=

0.22

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 11

LOAD Transient

112xxC

Cnp

Cin

Vcont

1.8V

Vin
=Vout

TYP

+1V

Iout
ON

OFF

0.01

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

2.2

CL=0.22

CL= Variable Cnp=0.01

Vout

Vin

CL=0.22

CL=1.0

CL=2.2

CL= Variable Cnp=0.01

Vout

Vin

Cnp=0.001

Cnp=0.01

Cnp=0.1

Cnp= Variable CL=1

Vout

Iout

33mA 30mA

3mA 0mA

30mA 33mA

0mA 3mA

Iout=0

30mA

Iout=3

33mA

Iout=0

30mA , 3

33mA

Vout

Iout

Iout=0

30mA

Iout=3

33mA

Magnification

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 14

Temperature Characteristics

(Ta: Ambient temperature)

Iout (mA)

Max Iout

340

360

380

400

420

440

460

480

500

-50

-25

100

Ta(

Vout=(Vout

Typ

0.9

GND current

Ignd(mA)

Iout=300mA

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

-50

-25

100

Ta(

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

100

Ta(

Vcont(ONpoint)

Vcont(OFFpoint)

Control current

Icont(

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

-50

-25

100

Ta(

Vcont=1.8V

Vcont=4.0V

Vcont=2.0V

Vcont=3.0V

Dropout voltae

Vdrop(mV)

-50

-25

100

Ta(

100

150

200

250

300

350

Io=300mA

Io=100mA

Io=150mA

Io=200mA

Io=50mA

150

200

250

300

350

400

450

500

550

-50

-25

100

Ta(

IoutMAX(mA)

Vin=1.9/2.0/2.1/2.2/2.3/2.4/2.5V

Output current

Vin=1.9V

Vin=2.2V

Vin=2.0V

Vin=2.1V

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 16

Layout

PCB Material : Glass epoxy t=0.8mm

SOT23L-6

SOT89-5

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

Determining the thermal resistance when mounted on a PCB.

The operating chip junction temperature is shown by
Tj=

Pd + Ta. Tj of the IC is set to about 150

Pd is a value when the overtemperature sensor is made to work.

Pd is easily obtained.

Mount the IC on the print circuit board. Short between the output pin and ground. after that, raise input

voltage from 0V to evaluated voltage (see*1) gradually.
At shorted the output pin, the power dissipation P

can be expressed as Pd=Vin

Iin.

The input current decreases gradually as the temperature of the chip becomes high. After a while, it
reaches the thermal equilibrium. Use this currrent value at the thermal equilibrium. In almost all the
cases, it shows 600mW(SOT23L-6)900mW(SOT89-5) or more.

*1 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.

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

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

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=600mW and 25

C or more. Thermal

resistance is (

ja=250

C / W).

Vout

On/off

Vin

Please do derating with 7.2mW/

C at

Pd=900mW and 25

C or more.

Thermal resistance is (

ja=138

C / W)

600

SOT-89

-7.2mW/

100

150

Pd(mW)

(85)

900

SOT-23- L
-4.8mW/

on/off

Vin

Vout

Ta (Ta=25

150 =

pd + 25

Pd = 125

ja = (125/ pd) (

C / mW)

Pd(mW)

25 50

100

150

(75)

DPd

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 17

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 (500K

) 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=0.068

F. 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

Current boost

For current boost applications, use the products below. A low voltage drop, high current regulator

can be easily made.

TK714xx Only the PNP transistor for the current boost is external.
TK732xx ( For Iout=10A Max regulator)

Built-in Short circuit protection: a constant current can be set by an external

resistor.

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 across 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

3.3V

On/Off Cont.

Vin

TK11250C

TK11233C

TK11220C

REG

Vsat
OP

On/Off Cont.

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 18

Definition of Term s

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

(

Vout

Typ

. 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=1.0

and C

=0.01

An Alternating Current source of (f=1KHz and 200mV

RMS

) 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.

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 19

PROTECTION CIRCUIT S

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 0

200V Min

HBM 100pF 1.5k

2000V Min

Vout

Vin

GND

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 20

Outline ;

PCB ;

Stamps

SOT23L-6

V OUT V CODE V OUT V CODE V OUT V CODE

V OUT V CODE

1.5 v

2.5 v

3.5 v

4.5 v

1.6

2.6

3.6

4.6

1.7

2.7

3.7

4.7

1.8

2.8

3.8

4.8

1.9

2.9

3.9

4.9

2.0

3.0

4.0

5.0

2.1

3.1

4.1

2.2

3.2

4.2

2.3

3.3

4.3

2.4

3.4

4.4

The output voltage table indicates the standard value when manufactured.

Please contact your authorized Toko representative for voltage availability

Voltage

Code

R X X

0.4

+0.15

0.05

0.1

0.32

+0.15

0.05

0.1

0.95

TypeCode

Recommended Mount Pad

0.95

1.0

0.6

3.0

1.4Max

2.2

0.2

0.15

0.1

1.2

0.2

0.3

3.3

0.3

0.4

0.2

15ºMax

+0.3

0.1

(3.4)

3.5

0.1

Molded Resin with Body : Epoxy Resin

Lead Frame

: Copper Alloy

Treatment

: Solder Plating(5

Marking Method

: Ink or Laser

Weight

: 0.023g

Country of origin

:Japan or Korea

Unit : mm
General tolerance :

0.2

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 21

SOT89-5

V OUT V CODE V OUT V CODE V OUT V CODE

V OUT V CODE

1.5 v

2.5 v

3.5 v

4.5 v

1.6

2.6

3.6

4.6

1.7

2.7

3.7

4.7

1.8

2.8

3.8

4.8

1.9

2.9

3.9

4.9

2.0

3.0

4.0

5.0

2.1

3.1

4.1

2.2

3.2

4.2

2.3

3.3

4.3

2.4

3.4

4.4

The output voltage table indicates the standard value when manufactured.

Please contact your authorized Toko representative for voltage availability

Unit : mm

General tolerance :

0.2

Molded Resin with Body : Epoxy Resin

Lead Frame

: Copper Alloy

Treatment

: Solder Plating(5

Marking Method

: Ink or Laser

Weight

: 0.053 g

Country of origin

: Japan

1.0

2.5

0.2

4.5

+0.5

0.3

0.44

Max

VOLTAGE

CODE

0.49

Max

0.49

Max

0.49

Max

1.6

4.5

0.2

0.49

Max

0.49

Max

0.54

Max

1.0

2.5

0.2

0.4

LOT No

TYPE CODE

R:112XX

0.7Max

1.0

0.7Max

1.5

2.0

1.5

0.7

0.8

1.5

0.7

45°

Recommended Mount Pad

1.5

0.2

1.5

3.0

TOKO Inc.

IC Data Sheet

TK112xxC

GC3-H026A

Page 22

NOTE

Please be sure that you carefully discuss your planned purchase with our office if you intend to use the

products in this data sheet 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 data sheet.

l 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.
l 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.
l Electrical instruments, equipment or systems used in disaster or crime prevention.

n 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.

n This data sheet is effective from

Oct. 2002

. Note that the contents are subject to change or

discontinuation without notice. When placing orders, please confirm specifications and delivery
condition in writing.

n TOKO 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

data sheet. Moreover, this data sheet does not signify that TOKO agrees implicitly or explicitly to

license any patent rights or other intellectual property rights which it holds.

n None of ozone depleting substances(ODS) under the Montreal Protocol is used in manufacturing

process of us.

If you need more information on this product and other TOKO products, please contact us.

OFFICE

n TOKO Inc. Headquarters

1-17, Higashi-yukigaya 2-chome, Ohta-ku, Tokyo,145-8585, Japan

TEL: +81.3.3727.1161

FAX: +81.3.3727.1176 or +81.3.3727.1169

Web site:

http://www.toko.co.jp/

n TOKO America

Web site:

http://www.toko.com/

n TOKO Europe

Web site:

http://www.tokoeurope.com/

n TOKO Hong Kong

Web site:

http://www.toko.com.hk/

n TOKO Taiwan

Web site:

http://www.tokohc.com.tw/

n TOKO Singapore

Web site:

http://www.toko.com.sg/

n TOKO Seoul

Web site:

http://www.toko.co.kr/

n TOKO Manila

Web site:

http://www.toko.com.ph/

n TOKO Brazil

Web site:

http://www.toko.com.br/

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