1 Features

1? LM27313-Q1 is an Automotive-Grade Product that

is AEC-Q100 Grade 1 Qualified (–40°C to +125°C

Operating Junction Temperature)

? 30-V DMOS FET Switch

? 1.6-MHz Switching Frequency

? Low RDS(ON) DMOS FET

? Switch Current up to 800 mA

? Wide Input Voltage Range (2.7 V to 14 V)

? Low Shutdown Current (< 1 μA)

? 5-Lead SOT-23 Package

? Uses Tiny Capacitors and Inductors

? Cycle-by-Cycle Current Limiting

? Internally Compensated

2 Applications

? White LED Current Source

? PDAs and Palm-Top Computers

? Digital Cameras

? Portable Phones, Games, and Media Players

? GPS Devices

3 Description

The LM27313/-Q1 switching regulator is a current-

mode boost converter with a fixed operating

frequency of 1.6 MHz.

The use of the SOT-23 package, made possible by

the minimal losses of the 800-mA switch, and the small inductors and capacitors result in extremely

high power density. The 30-V internal switch makes

these solutions perfect for boosting to voltages of 5 V

to 28 V.

This device has a logic-level shutdown pin that can

be used to reduce quiescent current and extend battery life.

Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation

simplifies design and reduces component count.