MIC5310

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

April 2006

M9999-042406

(408) 955-1690

General Description

The MIC5310 is a tiny Dual Ultra Low-Dropout

(ULDO™) linear regulator ideally suited for portable

electronics due to its high power supply ripple

rejection (PSRR) and ultra low output noise. The

MIC5310 integrates two high-performance; 150mA

ULDOs into a tiny 2mm x 2mm leadless MLF

®

package, which provides exceptional thermal package

characteristics.

The MIC5310 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, high power supply rejection and

exceptional thermal package characteristics makes it

ideal for powering RF/noise sensitive circuitry, cellular

phone camera modules, imaging sensors for digital

still cameras, PDAs, MP3 players and WebCam

applications

The MIC5310 ULDO™ is available in fixed-output

voltages in the tiny 8-pin 2mm x 2mm leadless MLF

®

package which occupies less than half the board area

of a single SOT-6 package. 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

• High PSRR - >70dB @ 1KHz

• ±2% initial output accuracy

• Excellent Load/Line transient response

• Fast start-up time: 30µs

• µCap stable with 1µF ceramic capacitor

• Thermal shutdown protection

• Low quiescent current: 75µA per output

• Current limit protection

Applications

• Mobile phones

• PDAs

• GPS receivers

• Portable electronics

• Portable media players

• Digital still and video cameras

Typical Application

VIN

EN 2

VOUT 1

VOUT 2

GND

MIC5310-x.xYML

1µF

0.1µF

EN 1

BYP

1µF

Rx/Synth

Tx

RF

Transceiver

1µF

RF Power Supply Circuit