LT3464

1

3464f

TYPICAL APPLICATIO

APPLICATIO S

DESCRIPTIO

FEATURES

s

Tiny Solution Size

s

Low Quiescent Current

µA in Active Mode

µA in Shutdown Mode

s

Internal 115mA, 36V Switch

s

Integrated Schottky Diode

s

Integrated PNP Output Disconnect with

Short-Circuit Protection

s

Internal Reference Override Pin

s

16V at 8mA from 3.6V Input

s

12V at 20mA from 5V Input

s

Input Range: 2.3V to 10V

s

High Output Voltage: Up to 34V

s

Low Profile (1mm) SOT-23 Package

Micropower Boost

Converter with Schottky and

Output Disconnect in ThinSOT™

The LT

with integrated Schottky diode and output disconnect

packaged in an 8-lead low profile (1mm) SOT-23. The

small package size, high level of integration, and the use

of tiny SMT components yield a solution size of less than

as well as fast switching speed to allow the use of a chip

inductor and small ceramic capacitors. The internal PNP

disconnects the output load from the input during shut-

down, and also provides output short-circuit protection.

An auxiliary reference input allows the user to override the

internal 1.25V feedback reference with any lower value,

allowing full control of the output voltage during opera-

tion. This device features a low 25

µA quiescent current,

which is further reduced to less than 0.5

µA in shutdown.

A current limited fixed off-time control scheme conserves

operating current, resulting in high efficiency over a broad

range of operating current. The rugged 36V switch and

output disconnect circuitry allow outputs up to 34V to be

easily generated in a simple boost topology.

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

s

OEL Panel Bias

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LCD Bias

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Handheld Computers

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Battery Backup

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Digital Cameras

s

Cellular Phones

CTRL

SHDN

2.3V TO 10V

16V

SW

GND

OUT

CAP

FB

LT3464

22

µH

1

µF

0.22

µF

0.33

µF

3.48M

294k

3464 TA01a

ThinSOT is a trademark of Linear Technolgy Corporation

Efficiency

LOAD CURRENT (mA)

90

80

70

60

50

40

30

0.01

1

10

100

3634 TA01b

0.1