Datasheet > MIC5249-3.0BMMTR

MIC5249-3.0BMMTR

更新时间： 2024-11-23 15:42:55

品牌	Logo	应用领域
美国微芯 - MICROCHIP		光电二极管
页数	文件大小	规格书
7页	167K
描述
Fixed Positive LDO Regulator, 3V, 0.6V Dropout, CMOS, PDSO8, MSOP-8

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MIC5249-3.0BMMTR 数据手册

MIC5249

300mA µCap LDO with Programmable Power-On

Reset Delay

General Description

Features

The MIC5249 is an efficient, precise 300mA CMOS

voltage regulator with power-on reset delay which can be

implemented via an external capacitor. It offers 1% initial

accuracy, extremely-low-dropout voltage (typically 400mV

@ 300mA), and low ground current (typically 85mA) over

load.

• 300mA output current

• High PSRR: 65dB@120Hz

• Stable with ceramic output capacitor

• Power-on RESET output with adjustable delay time

• High output accuracy:

–

±1.0% initial accuracy

±3.0% over temperature

Designed specifically for noise-critical applications in hand-

held or battery-powered devices, the MIC5249 comes

equipped with a noise reduction feature to filter the output

noise via an external capacitor. Other features of the

MIC5249 include a logic compatible enable pin, current

limit, thermal shutdown, ultra-fast transient response, and

an active clamp to speed up device turnoff.

• Low dropout voltage of 400mV @ 300mA

• Low quiescent current: 85µA

• Zero current shutdown mode

• Thermal shutdown protection

• Current-limit protection

The MIC5249 also works with low-ESR ceramic

capacitors, reducing the amount of board space necessary

for power applications, critical in hand-held wireless

devices.

• Tiny MSOP-8 package

Applications

The MIC5249 is available in the MSOP-8 package.

• Cellular phones

• PDAs

• Fiber optic modules

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Typical Application

Ultra-Low Noise Application

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-090806

September 2006

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