Datasheet > MIC5249

MIC5249

更新时间： 2024-11-22 22:58:15

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
7页	41K
描述
300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY

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MIC5249 数据手册

MIC5249

Micrel

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 imple-

mentedviaanexternalcapacitor. Itoffers1%initialaccuracy,

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

noiseviaanexternalcapacitor.OtherfeaturesoftheMIC5249

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

• 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

All support documentation can be found on Micrel’s web site

at www.micrel.com.

Ordering Information

Part Number

Voltage* Junction Temp. Range

Package

MSOP-8

MIC5249-1.8BMM

MIC5249-2.5BMM

MIC5249-2.6BMM

MIC5249-2.8BMM

MIC5249-2.85BMM

MIC5249-3.0BMM

1.8V

2.5V

2.6V

2.8V

2.85V

3.0V

–40°C to 125°C

* Other voltages available. Contact Micrel for details.

Typical Application

MIC5249-x.xBMM

V_IN

V_OUT

OUT

ENABLE

SHUTDOWN

RESET

DELAY CBYP

GND

_AD=1.0µF

C_OUT=2.2µF

Ceramic

C_BYP=0.01µF

Sets the delay for

the RESET output

Ultra-Low-Noise Application

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

M0382-033004

March 2004

12 3 4 5 6 7

中文翻译

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与MIC5249相关器件

型号	品牌	获取价格	描述	数据表
MIC5249_12	MICREL	获取价格	300mA μCap LDO with Programmable Power-On Res
MIC5249-1.5YMM	MICREL	获取价格	300mA μCap LDO with Programmable Power-On Res
MIC5249-1.8BMM	MICREL	获取价格	300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY
MIC5249-1.8BMMTR	MICROCHIP	获取价格	Fixed Positive LDO Regulator, 1.8V, 0.6V Dropout, CMOS, PDSO8, MSOP-8
MIC5249-1.8YMM	MICREL	获取价格	300mA μCap LDO with Programmable Power-On Res
MIC5249-1.8YMMTR	MICROCHIP	获取价格	1.8V FIXED POSITIVE LDO REGULATOR, 0.6V DROPOUT, PDSO8, LEAD FREE, MSOP-8
MIC5249-2.5BMM	MICREL	获取价格	300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY
MIC5249-2.5BMMTR	MICREL	获取价格	Fixed Positive LDO Regulator, 2.5V, 0.6V Dropout, CMOS, PDSO8, MSOP-8
MIC5249-2.5YMM	MICREL	获取价格	300mA μCap LDO with Programmable Power-On Res
MIC5249-2.5YMMTR	MICREL	获取价格	2.5V FIXED POSITIVE LDO REGULATOR, 0.6V DROPOUT, PDSO8, LEAD FREE, MSOP-8

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