LM27313/-Q1 1.6-MHz Boost Converter With 30-V Internal FET Switch in SOT-23

1 Features

• 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 R_DS(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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Circuit

Efficiency vs. Load Current

4 Revision History

Changes from D Revision (April 2013) to E Revision

• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from C Revision (April 2013) to D Revision

• Changed layout of National Data Sheet to TI formatGo