LM27313

SW

FB

GND

VIN

SHDN

U1

R3

51k

SHDN

GND

5 VIN

C1

2.2 2F

R2

13.3k

CF

220 pF

D1

MBR0520

R1/117k

L1/10 2H

C2

4.7 2F

12V

OUT

260 mA

(TYP)

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LM27313, LM27313-Q1

SNVS487E – DECEMBER 2006 – REVISED JANUARY 2015

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

1 Features

3 Description

The LM27313/-Q1 switching regulator is a current-

1

•

LM27313-Q1 is an Automotive-Grade Product that

mode

boost

converter

with

a

fixed

operating

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

frequency of 1.6 MHz.

Operating Junction Temperature)

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

•

30-V DMOS FET Switch

the minimal losses of the 800-mA switch, and the

•

1.6-MHz Switching Frequency

small inductors and capacitors result in extremely

•

Low RDS(ON) DMOS FET

high power density. The 30-V internal switch makes

these solutions perfect for boosting to voltages of 5 V

•

Switch Current up to 800 mA

to 28 V.

•

Wide Input Voltage Range (2.7 V to 14 V)

This device has a logic-level shutdown pin that can

•

Low Shutdown Current (< 1 µA)

be used to reduce quiescent current and extend

•

5-Lead SOT-23 Package

battery life.

•

Uses Tiny Capacitors and Inductors

Protection is provided through cycle-by-cycle current

•

Cycle-by-Cycle Current Limiting

limiting and thermal shutdown. Internal compensation

•

Internally Compensated

simplifies design and reduces component count.

2 Applications

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

White LED Current Source

LM27313

•

PDAs and Palm-Top Computers

SOT-23 (5)

2.90 mm x 1.60 mm

LM27313-Q1

•

Digital Cameras

(1) For all available packages, see the orderable addendum at

•

Portable Phones, Games, and Media Players

the end of the data sheet.

•

GPS Devices

Typical Application Circuit

Efficiency vs. Load Current

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.