LM2704

www.ti.com

SNVS175C – MAY 2004 – REVISED MAY 2004

LM2704 Micropower Step-up DC/DC Converter with 550mA Peak Current Limit

Check for Samples: LM2704

1

FEATURES

APPLICATIONS

2

•

550mA, 0.7

Ω, Internal Switch

•

LCD Bias Supplies

•

Uses Small Surface Mount Components

•

White LED Back-Lighting

•

Adjustable Output Voltage up to 20V

•

Handheld Devices

•

2.2V to 7V Input Range

•

Digital Cameras

•

Input Undervoltage Lockout

•

Portable Applications

•

0.01µA Shutdown Current

•

Small 5-Lead SOT-23 Package

DESCRIPTION

The LM2704 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time

control scheme conserves operating current resulting in high efficiency over a wide range of load conditions. The

21V switch allows for output voltages as high as 20V. The low 400ns off-time permits the use of tiny, low profile

inductors and capacitors to minimize footprint and cost in space-conscious portable applications. The LM2704 is

ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone

back-lighting. The LM2704 can drive up to 8 white LEDs from a single Li-Ion battery.

Typical Application Circuit

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004, 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.