Datasheet > MIC5249-3.3YMM

MIC5249-3.3YMM

更新时间： 2024-11-23 07:17:03

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
7页	199K
描述
300mA μCap LDO with Programmable Power-On Reset Delay

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MIC5249-3.3YMM 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 (POR) 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 (POR) output with adjustable delay

time

• High output accuracy:

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.

−

±1.0% initial accuracy

±3.0% over temperature

• Low dropout voltage of 340mV @ 300mA

• Low quiescent current: 85µA

• Zero current shutdown mode

• Thermal-shutdown and current-limit protection

• Tiny MSOP-8 package

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.

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

M9999-030812

March 2012

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