LT3462/LT3462A

3462af

1

APPLICATIO S

DESCRIPTIO

FEATURES

TYPICAL APPLICATIO

s

Integrated Schottky Rectifier

s

Fixed Frequency 1.2MHz/2.7MHz Operation

s

s

s

–5V at 100mA from 5V Input

s

–12V at 30mA from 3.3V Input

s

Low Input Bias Current GND Based FB Input

s

Low Impedance (40

Ω) 1.265V Reference Output

s

High Output Voltage: Up to – 38V

s

Wide Input Range: 2.5V to 16V

s

Uses Tiny Surface Mount Components

s

Low Shutdown Current: <10

µA

s

Low Profile (1mm) SOT-23 (ThinSOT

s

CCD Bias

s

LCD Bias

s

GaAs FET Bias

s

General Purpose Negative Voltage Supply

Inverting 1.2MHz/2.7MHz

DC/DC Converters with

Integrated Schottky in ThinSOT

The LT

quency current mode inverting DC/DC converters. Both

switch allowing a small converter footprint and lower parts

cost. The LT3462 switches at 1.2MHz while the LT3462A

switches at 2.7MHz. These high speeds enable the use of

tiny, low cost and low height capacitors and inductors.

The LT3462/LT3462A operate in a dual inductor inverting

topology that filters both the input and output currents.

achieved when ceramic capacitors are used. Fixed fre-

quency switching ensures a clean output free from low

frequency noise typically present with charge pump solu-

up to 38V for dual inductor topologies.

Both devices provide a low impedance 1.265V reference

output to supply the feedback resistor network. A ground

referenced, high impedance FB input allows high feedback

resistor values without compromising output accuracy.

The LT3462/LT3462A are available in a 6-lead SOT-23

package.

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

5V to –5V, 100mA Inverting DC/DC Converter

Efficiency

ThinSOT is a trademark of Linear Technology Corporation

LOAD CURRENT (mA)

0

75

70

65

60

55

3462 TA01b

20

40

80

60

100

5V

22

µH

22

µH

267k

68.1k

10

µF

22pF

1

µF

1

µF

–5V

100mA

SW

FB

SDREF

GND

LT3462A

3462 TA01

D