MIC5233-2.5BM5 Просмотр технического описания (PDF) - Micrel

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MIC5233-2.5BM5

High Input Voltage Low IQ µCap LDO Regulator

Micrel 

MIC5233

High Input Voltage

Low IQ µCap LDO Regulator

General Description

The MIC5233 is a 100mA highly accurate, low dropout

regulator with high input voltage and ultra-low ground

current. This combination of high voltage and low ground

current makes the MIC5233 ideal for multi-cell Li-Ion

battery systems.

A μCap LDO design, the MIC5233 is stable with either

ceramic or tantalum output capacitor. It only requires a

2.2μF capacitor for stability.

Features of the MIC5233 include enable input, thermal

shutdown, current limit, reverse battery protection, and

reverse leakage protection.

Available in fixed and adjustable output voltage versions,

the MIC5233 is offered in the IttyBitty® SOT-23-5 package

with a junction temperature range of –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Wide input voltage range: 2.3V to 36V

• Ultra low ground current: 18μA

• Low dropout voltage of 270mV at 100mA

• High output accuracy of ±2.0% over temperature

• μCap: stable with ceramic or tantalum capacitors

• Excellent line and load regulation specifications

• Zero shutdown current

• Reverse battery protection

• Reverse leakage protection

• Thermal shutdown and current limit protection

• IttyBitty® SOT-23-5 package

•

Applications

• Keep-alive supply in notebook and portable computers

• USB power supply

• Logic supply for high-voltage batteries

• Automotive electronics

• Battery powered systems

• 3-4 cell Li-Ion battery input range

___________________________________________________________________________________________________________

Typical Application

VIN

MIC5233BM5

1

5

CIN=1.0µF

2

3

OFF ON

EN

R1

4

R2

VOUT

COUT=2.2µF

ceramic

IGND=18µA

Ultra-Low Current Adjustable Regulator Application

Ground Current vs. Input Voltage

IttyBitty is a registered trademark of Micrel, Inc

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

September 2009

M9999-092109

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