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

Burst Mode is a registered trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Patents Pending.

LTC3525L-3

1

3525lf

LOAD (mA)

0.01

0.1

100

90

80

70

60

50

40

30

20

100

10

1

0.1

0.01

1

10

1000

100

LT3525 • TA02

EFFICIENCY

POWER LOSS

400mA Micropower

Synchronous Step-Up DC/DC

Converter with Output Disconnect

up DC/DC converter with output disconnect that can

start up with an input as low as 0.7V. It offers a compact,

high efficiency alternative to charge pumps in single

cell or dual cell alkaline applications. Only three small

external components are required. The LTC3525L-3

generates a fixed 3V output voltage.

The device includes a 0.5

N-channel MOSFET switch

and a 0.85 P-channel synchronous rectifier. Peak switch

current ranges from 150mA to 400mA, depending on

load, providing enhanced efficiency. Quiescent current

is an ultralow 7µA, maximizing battery life in portable

applications.

Other features include <1µA shutdown current, anti-

ringing control and thermal shutdown. The LTC3525L-3

is available in a tiny 6-pin SC70 package.

■

MP3 Players

■

Portable Instruments

■

Glucose Meters

■

Digital Cameras

■

Startup at 0.7V Typical, 0.88V Guaranteed

■

Up to 95% Efficiency

■

Output Disconnect and Inrush Current Limit

■

3V Fixed Output Voltage

■

Delivers 65mA at 3V from a 1V Input or 160mA

from a 1.8V input

■

■

■

Only Three External Components

■

■

<1µA Shutdown Current

■

Antiringing Control

■

Short-Circuit and Overtemperature Protection

■

Tiny 6-Pin SC70 Package

LTC3525L-3 Efficiency and Power

Loss vs Load Current

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

3525 TA01

LTC3525L-3

*MURATA LQH32CN100K53

3V

65mA

GND

SW

SHDN

GND

0.9V to 1.6V

OFF ON

L1*

10

µH

1

µF10µF