TK73226MCLH datasheet, PDF - EEWORLD Datasheet

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TK73226MCLH: DescriptionLOW DROPOUT REGULATOR; File Size123KB，16 Pages; ManufacturerTOKO, INC.; Websitehttps://www.murata.com/

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TK73226MCLH Overview

LOW DROPOUT REGULATOR

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TK732xx

LOW DROPOUT REGULATOR

FEATURES

Up to 5 A Output Current Capability With External

PNP Transistor

Internal Short Circuit Protection

Excellent Load Regulation

CMOS/TTL-Compatible On/Off Switch

Internal Reverse Bias Current Protection Switch

Internal Thermal Shutdown

Broad Operating Voltage Range

High Impedance V

SENSE

Pin (Off Mode)

Continuous and Pulsed Current Modes

APPLICATIONS

Battery Powered Systems

Cellular/Cordless Telephones

Radio Control Systems

Wireless Communications Systems

Portable Instrumentations

Portable Computers

Personal Digital Assistants

Local Area Network (LAN) Receivers

Lithium Ion Battery Chargers

Power Recovery for Microprocessors

DESCRIPTION

The TK732xx is a controller IC for a low dropout voltage

regulator. The TK732xx and the external PNP power

transistor provide standard output voltages from 2 to 11 V

and output current from 100 mA to 5 A. By utilizing an

external PNP power transistor, low dropout voltage at high

current can be readily achieved. The internal electronic

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 high logic level. A pin for a bypass capacitor, which

connects to the internal circuitry, is provided to lower the

overall output noise level.

The current limit characteristics can be configured as

continuous (constant current) or pulsed (cycling). An internal

thermal shutdown circuit limits the junction temperatures

to below 150

°C.

In the “off” mode, the output of the

regulator becomes a high impedance. This prevents the

output capacitor from being rapidly discharged for backup

to the load.

TK732xx

CONTROL

NOISE

BYPASS

01S

BASE

VSENSE

GND

CPULSE

VIN

IPK

BLOCK DIAGRAM

VIN

IPK

CPULSE

BASE

VSENSE

ORDERING INFORMATION

TK732

Voltage Code

Package Code

VOLTAGE CODE

20 = 2.0 V *

21 = 2.1 V *

22 = 2.2 V *

23 = 2.3 V *

24 = 2.4 V

25 = 2.5 V

26 = 2.6 V

27 = 2.7 V

28 = 2.8 V

29 = 2.9 V

30 = 3.0 V

31 = 3.1 V

32 = 3.2 V

33 = 3.3 V

34 = 3.4 V

35 = 3.5 V

36 = 3.6 V

37 = 3.7 V

38 = 3.8 V

39 = 3.9 V

40 = 4.0 V

41 = 4.1 V

42 = 4.2 V

43 = 4.3 V

M L

Grade

Tape/Reel Code

Temp. Code

TAPE/REEL CODE PACKAGE CODE

ON/OFF

CIRCUIT

THERMAL

SENSOR

CONTROL

M: SOT-23L-8

44 = 4.4 V

L: Tape Left

45 = 4.5 V

46 = 4.6 V

GRADE

TEMP. RANGE

47 = 4.7 V

None: Standard 2%

C: -30 to 80 C **

48 = 4.8 V

I : -40 to 85 C

H: High (Special) **

49 = 4.9 V

50 = 5.0 V

55 = 5.5 V *

* Unavailable with I Rank

Specified

70 = 7.0 V *

** unless Otherwise TK73242MCLH Available Only

*** TK73241MCLH,

80 = 8.0 V

11 = 11.0 V

BANDGAP

REFERENCE

LEAKAGE

PROTECTION

GND

NOISE BYPASS

January 1999 TOKO, Inc.

Page 1

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