TOKO

TK11222A Datasheet Preview

TK11222A Datasheet

VOLTAGE REGULATOR

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TK112xxA

VOLTAGE REGULATOR WITH ON/OFF SWITCH

FEATURES

s High Voltage Precision at ± 2.4%

s Active High On/Off Control

s Very Low Dropout Voltage 80 mV at 30 mA

s Very Low Noise

s Very Small SOT-23L or SOT-89-5 Surface Mount

Packages

s Internal Thermal Shutdown

s Short Circuit Protection

APPLICATIONS

s Battery Powered Systems

s Cellular Telephones

s Pagers

s Personal Communications Equipment

s Portable Instrumentation

s Portable Consumer Equipment

s Radio Control Systems

s Toys

s Low Voltage Systems

DESCRIPTION

The TK112xxA 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 70 mV (typ.) at 30 mA load current. The

TK112xxA has a very low quiescent current of 180 µA at no

load and 1 mA with a 30 mA load. The standby current is

typically 100 nA. The internal thermal shutdown circuitry

limits the junction temperature to below 150 °C. The load

current is internally monitored and the device will shutdown

in the presence of a short circuit or overcurrent condition at

the output.

The TK112xxA is available in either 6 pin SOT-23L or 5 pin

SOT-89-5 surface mount packages.

Voltage Code

ORDERING INFORMATION

TK112 A

Tape/Reel Code

Package Code

VIN

CONTROL

VOLTAGE CODE

20 = 2.0 V* 35 = 3.5 V*

21 = 2.1 V

36 = 3.6 V

22 = 2.22 V* 38 = 3.8 V

25 = 2.5 V* 40 = 4.0 V*

28 = 2.8 V* 42 = 4.2 V

29 = 2.9 V

45 = 4.5 V*

30 = 3.0 V* 48 = 4.8 V*

31 = 3.1 V* 49 = 4.9 V

33 = 3.3 V* 50 = 5.0 V*

55 = 5.5 V

PACKAGE CODE

M: SOT-23L

U: SOT-89-5

TAPE/REEL CODE

BX : Bulk/Bag

TL : Tape Left

(SOT-23L)

TB : Tape Bottom

(SOT-89-5)

* Indicates voltage is available in a SOT-89-5 package.

January, 1996 TOKO, Inc.

1-4-96

TK112XXA

CONTROL 1

P50

GND 2

NOISE

BYPASS

NOISE

BYPASS 1

GND 2

CONTROL 3

6 VIN

5 GND

4 VOUT

TK112xxA • PO

6 VOUT

5 GND

4 VIN

BLOCK DIAGRAM

S SS

THERMAL

PROTECTION

–

BANDGAP

REFERENCE

S VOUT

–

S GND

NOISE BYPASS

Page 1

TOKO

TK11222A Datasheet Preview

TK11222A Datasheet

VOLTAGE REGULATOR

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TK112xx A

ABSOLUTE MAXIMUM RATINGS

Supply Voltage ......................................................... 16 V

Power Dissipation SOT-23L (Note 1) ................. 400 mW

Power Dissipation SOT-89-5 (Note 2) ................ 800 mW

Storage Temperature Range ................... -55 to +150 °C

Operating Temperature Range ...................-30 to +80 °C

Lead Soldering Temp. (3 sec.) .............................. 230 °C

Junction Temperature ........................................... 150 °C

TK11220A ELECTRICAL CHARACTERISTICS

Test conditions: TA = 25 °C, VIN = 3.0 V, CP = 0.1 µF, unless otherwise specified.

SYMBOL

PARAMETER

TEST CONDITIONS

MIN TYP MAX UNITS

IIN Quiescent Current

IO = 0 mA, Except ICONT

170 350

µA

ISTBY

Standby Current

VIN = 8 V, at output off

0.1 µA

VDROP

Output Voltage

Dropout Voltage

IO = 30 mA

IO = 60 mA

IO = 150 mA

1.92 2.00 2.08

0.16 0.26

0.29 0.4

IO Output Current

VOUT = 1.7 V

180 240

IOR Recommended Output Current

150 mA

Line Reg

Load Reg

Line Regulation

Load Regulation

RR Ripple Rejection

VIN = 3 V → 8 V

IO = 5 mA → 60 mA (Note 3)

IO = 5 mA → 100 mA

IO = 5 mA → 150 mA

100 mV(rms), IO = 10 mA

3.0 20 mV

10 50 mV

20 100 mV

30 160 mV

55 dB

∆VO/∆TA

Output Voltage

Temperature Dependency

IO = 10 mA

-20 °C ≤ TA ≤ + 75 °C

0.2 mV/ °C

VNO Output Noise Voltage

10 Hz < f < 80 kHz,

IO = 30 mA

30 µV(rms)

VREF

Noise Bypass Terminal Voltage

1.25 V

Control Terminal Specification

ICONT

VCONT

Control Current

Control Voltage

Output Rise Time

Output on, VCONT = 1.8 V

12 30 µA

Output on

1.8

Output off

0.6 V

IO = 30 mA,

VCONT = 0 V → 1.8 V

0.3 ms

Note 1: Power dissipation is 400 mW when mounted as recommended. Derate at 3.2 mW/°C for TA > 25 °C.

Note 2: Power dissipation is 800 mW when mounted as recommended. Derate at 6.4 mW/°C for TA > 25 °C.

Note 3: This is a pulse measurement where TJ is constant. The output change due to temperature is not included.

Page 2

1-4-96 January, 1996 TOKO, Inc.

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TK11222A Datasheet

VOLTAGE REGULATOR

TK11222A Datasheet

VOLTAGE REGULATOR

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