LT1054 datasheet(1/12 Pages) LINER

Part #	LT1054

Description	High Voltage, Low Quiescent Current

PDF	12 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3261

1

3261f

TYPICAL APPLICATION

FEATURES

DESCRIPTION

High Voltage,

Low Quiescent Current

Inverting Charge Pump

The LTC®3261 is a high voltage inverting charge pump

that operates over a wide 4.5V to 32V input range and

is capable of delivering up to 100mA of output current.

The charge pump employs either low quiescent current

Burst Mode operation or low noise constant frequency

mode. In Burst Mode operation the charge pump VOUT

regulates to –0.94 • VIN and the LTC3261 draws only 60μA

of quiescent current. In constant frequency mode the charge

pump produces an output equal to –VIN and operates at

a fixed 500kHz or to a programmed frequency between

50kHz to 500kHz using an external resistor. The LTC3261

is available in a thermally enhanced 12-pin MSOP package.

APPLICATIONS

n 4.5V to 32V VIN Range

n Inverting Charge Pump Generates –VIN

n 60μA Quiescent Current in Burst Mode® Operation

n Charge Pump Output Current Up to 100mA

n 50kHz to 500kHz Programmable Oscillator

Frequency

n Short-Circuit/Thermal Protection

n Low Profile Thermally Enhanced 12-Pin MSOP

Package

n Bipolar/Inverting Supplies

n Industrial/Instrumentation Bias Generators

n Portable Medical Equipment

n Portable Instruments

L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

15V to –15V Inverter

10μF

–15V

3261 TA01

VOUT

15V

LTC3261

GND

VIN

MODE

C–

RT

EN

C+

1μF

VOUT Ripple

100μs/DIV

VOUT

10mV/DIV

AC-COUPLED

VOUT = –14.8V

VOUT = –14.1V

MODE = L

MODE = H

VOUT

200mV/DIV

AC-COUPLED

3261 TA01a

VIN = 15V

fOSC = 500kHz

IOUT = 5mA

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