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MIC5322-2.8

Dual, High Performance 150mA µCap ULDO™

Micrel 

MIC5322

Dual, High Performance 150mA

µCap ULDO™

General Description

The MIC5322 is a tiny Dual Ultra Low-Dropout

(ULDO™) linear regulator ideally suited for those

applications that require high Power Supply Rejection

Ratio (PSRR). It provides a bypass pin to increase

PSRR for noise sensitive portable electronics. The

MIC5322 integrates two high-performance; 150mA

ULDOs into a very compact 1.6mm x 1.6mm leadless

Thin MLF® package with exceptional thermal package

characteristics.

The MIC5322 is a µCap design which enables

operation with very small ceramic output capacitors

for stability, thereby reducing required board space

and component cost. The combination of extremely

low-drop-out voltage, very high power supply

rejection, very low output noise and exceptional

thermal package characteristics makes it ideal for

powering RF applications, cellular phones, GPS,

imaging sensors for digital still cameras, PDAs, MP3

players and other portable applications.

The MIC5322 ULDO™ is available in fixed-output

voltages in a tiny 6-pin 1.6mm x 1.6mm leadless Thin

MLF® package which is only 2.56mm2 in area, - 30%

less area than the SOT-23, TSOP and MLF® 3x3

packages. Additional voltage options are available.

For more information, contact Micrel marketing

department.

Data sheets and support documentation can be found

on Micrel’s web site at: www.micrel.com.

Features

• 2.3V to 5.5V input voltage range

• Ultra-low dropout voltage ULDO™ 35mV @

150mA

• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless

package

• Bypass pin for improved noise performance

• High PSRR – >75dB on each LDO

• Ultra low noise output - > 30µVrms

• Dual 150mA outputs

• µCap stable with 1µF ceramic capacitor

• Low quiescent current – 150µA

• Fast turn-on time – 45µs

• Thermal shutdown protection

• Current Limit protection

Applications

• Mobile phones

• GPS receivers

• Portable media players

• Digital still and video cameras

• PDAs

• Portable electronics

Typical Application

MIC5322-x.xYMT

VIN VOUT 1

VOUT 2

EN

1µF

BYP

GND

0.01µF

RF

Core

1µF 1µF

GPS

Module

RF Power Supply Circuit

ULDO is a trademark of Micrel, Inc.

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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

May 2008

M9999-051508-B

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