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LTC3251EMSE#TRPBF

更新时间： 2024-11-05 12:58:03

品牌	Logo	应用领域
Linear Systems		/
页数	文件大小	规格书
12页	189K
描述
LTC3251 - 500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converters; Package: MSOP; Pins: 10; Temperature Range: -40°C to 85°C

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LTC3261

High Voltage,

Low Quiescent Current

Inverting Charge Pump

FEATURES

DESCRIPTION

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.

4.5V to 32V V Range

Inverting Charge Pump Generates –V

60μA Quiescent Current in Burst Mode^®Operation

Charge Pump Output Current Up to 100mA

50kHz to 500kHz Programmable Oscillator

Frequency

The charge pump employs either low quiescent current

Burst Mode operation or low noise constant frequency

mode. In Burst Mode operation the charge pump V

OUT

Short-Circuit/Thermal Protection

Low Profile Thermally Enhanced 12-Pin MSOP

Package

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

ofquiescentcurrent.Inconstantfrequencymodethecharge

pump produces an output equal to –V and operates at

a fixed 500kHz or to a programmed frequency between

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

isavailableinathermallyenhanced12-pinMSOPpackage.

APPLICATIONS

Bipolar/Inverting Supplies

Industrial/Instrumentation Bias Generators

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.

Portable Medical Equipment

Portable Instruments

TYPICAL APPLICATION

15V to –15V Inverter

1μF

V_OUTRipple

–

OUT

MODE = L

MODE = H

= –14.8V

= –14.1V

OUT

10mV/DIV

–15V

15V

OUT

AC-COUPLED

10μF

LTC3261

MODE

OUT

200mV/DIV

AC-COUPLED

GND

3261 TA01a

100μs/DIV

= 15V

= 500kHz

= 5mA

3261 TA01

OSC

OUT

3261f

12 3 4 5 6 7...12

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