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LT3460

1.3MHz Step-Up DC/DC

Converter in SC70 and ThinSOT

FEATURES

s

s

s

s

s

s

s

s

s

DESCRIPTIO

1.3MHz Switching Frequency

High Output Voltage: Up to 36V

300mA Integrated Switch

12V at 70mA from 5V Input

5V at 60mA from 3.3V Input

Wide Input Range: 2.5V to 16V

Uses Small Surface Mount Components

Low Shutdown Current: <1碌A(chǔ)

Low Profile (1mm) SC70 and SOT-23 (ThinSOT

TM

)

Packages

The LT

廬

3460 is a general purpose step-up DC/DC con-

verter. The LT3460 switches at 1.3MHz, allowing the use

of tiny, low cost and low height capacitors and inductors.

The constant frequency results in low, predictable output

noise that is easy to filter.

The high voltage switch in the LT3460 is rated at 38V,

making the device ideal for boost converters up to 36V.

The LT3460 can generate 12V at up to 70mA from a 5V

supply.

The LT3460 is available in SC70 and SOT-23 packages.

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

ThinSOT is a trademark of Linear Technology Corporation

APPLICATIO S

s

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s

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Digital Cameras

CCD Bias Supply

XDSL Power Supply

TFT-LCD Bias Supply

Local 5V or 12V Supply

Medical Diagnostic Equipment

Battery Backup

TYPICAL APPLICATIO

90

85

EFFICIENCY (%)

80

75

70

65

60

5V to 12V, 70mA Step-Up DC/DC Converter

V

IN

5V

4.7碌F

V

IN

LT3460

OFF ON

SHDN

GND

FB

15k

1碌F

22碌H

V

OUT

12V

70mA

SW

130k

22pF

0

3460 F01

V

SW

5V/DIV

I

L

100mA/DIV

U

Efficiency

20

40

60

LOAD CURRENT (mA)

80

3460 F01a

U

U

Switching Waveforms

0.2碌s/DIV

3460 F01b

3460f

1

next

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