MIC5249-2.85BMMTR Micrel Semiconductor, MIC5249-2.85BMMTR Datasheet

MIC5249-2.85BMMTR

Manufacturer Part Number

MIC5249-2.85BMMTR

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC5249-2.85BMMTR.pdf (7 pages)

Specifications of MIC5249-2.85BMMTR

Date_code

03+

Packing_info

8MSOP

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General Description

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.

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.

The

capacitors, reducing the amount of board space necessary

for power applications, critical in hand-held wireless

devices.

The MIC5249 is available in the MSOP-8 package.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Typical Application

September 2006

MIC5249

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

also

works

with

low-ESR

Ultra-Low Noise Application

ceramic

Features

• 300mA output current

• High PSRR: 65dB@120Hz

• Stable with ceramic output capacitor

• Power-on RESET output with adjustable delay time

• High output accuracy:

• Low dropout voltage of 400mV @ 300mA

• Low quiescent current: 85µA

• Zero current shutdown mode

• Thermal shutdown protection

• Current-limit protection

• Tiny MSOP-8 package

Applications

• Cellular phones

• PDAs

• Fiber optic modules

–

300mA µCap LDO with Programmable Power-On

±1.0% initial accuracy

±3.0% over temperature

MIC5249

Reset Delay

M9999-090806

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