1

LT1305

Micropower High Power

DC/DC Converter with

Low-Battery Detector

s

2-Cell and 3-Cell to 5V Conversion

s

EL Panel Drivers

s

Portable Instruments

S

APPLICATI

APPLICATI

TYPICAL

LBI

SHDN

100k

1%

301k

1%

2 TO 3

CELLS

316k

1%

412k

1%

C1

220

µF

C2

220

µF

SHUTDOWN

LT1305

GND

PGND

FB

LBO

SW

D1

LT1305 • TA03

L1

10

µH

100k

+

C1, C2: AVX TPSE227010R0100

D1: MOTOROLA MBRS130LT3

L1: COILCRAFT D03316-103

5V

400mA

+

LOW BATTERY

GOES LOW AT

LOAD CURRENT (mA)

1

80

90

10

100

1000

LT1305 • TA02

70

60

Efficiency

DESCRIPTIO

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FEATURE

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5V at 400mA from 2V Input

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Supply Voltage As Low As 1.8V

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120

µA Quiescent Current

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Low-Battery Detector

s

s

Uses Inexpensive Surface Mount Inductors

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8-Lead SO Package

The LT

that uses Burst Mode

the LT1305 features a 2A internal low-loss switch and can

deliver up to four times the output power of the LT1303.

Quiescent current is only 120

µA and the Shutdown pin

further reduces current to 10

µA. A low-battery detector

provides an open-collector output that goes low when the

input voltage drops below a preset level. The LT1305 is

available in an 8-pin SO, easing board space requirements.

2-Cell and 3-Cell to 5V/400mA DC/DC Converter

with Low-Battery Detect

Burst Mode is a trademark of Linear Technology Corporation

, LTC and LT are registered trademarks of Linear Technology Corporation.