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.