ENABLE

ACC_PWR

GND

VCC

POK

ACC_DET

A1

B1

C1

A2

B2

C2

PC

Accessory

Device

220k

1M

Accessory

Detection

VCC Main: 2.8V to 5.3V

1.8V

VIN

220k

LM34902

www.ti.com

SNVS804B – MAY 2012 – REVISED APRIL 2013

300mA Current Limited Power Switch

Check for Samples: LM34902

1

FEATURES

DESCRIPTION

The LM34902 is a 0.3A PFET switch used to control

2

•

Input Voltage of 2.8V to 5.3V

the input voltage of electronic devices. It is easily

•

0.3A Maximum Switch Current

integrated into system designs that have a 2.8V to

•

0.64

Ω Typical Total On-Resistance

5.3V voltage rail. Besides the 0.45

Ω PFET switch, the

LM34902 can be enabled or disabled by a logic

•

Load Detection

signal.

The

IC

monitors

the

presence

of

a

•

Enable/Disable

downstream electronic device via a dedicated pin to

•

Switch On Indicator

decide whether to turn on the PFET switch. A power

good signal generated by the IC can be used by

•

Peak Current Limit

system control to determine the status of the switch.

•

Thermal Shutdown

The LM34902 also provides over-current and over-

•

6-Bump Thin DSBGA Package

temperature protection. The IC comes in a tiny 6-

bump Thin DSBGA package.

APPLICATIONS

•

Handsets, Tablets, Notebooks

•

Portable devices

Typical Application Circuit

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2012–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.