MIC5313

Low Voltage Dual 300mA LDO

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

July 2008

M9999-070208-A

General Description

The MIC5313 is a high performance, dual low input

voltage, low dropout regulator. Major features include two

300mA LDOs, input voltage down to 1.7V, ultra low drop

out of 85mV at full load. Each LDO has its own low voltage

input for system flexibility. The low input voltages and low

drop out operation provides high efficiency by reducing the

input to output voltage step which minimizes the regulator

power loss.

Ideal for battery operated applications; the MIC5313 offers

1% accuracy and low ground current to increase light load

efficiency. The MIC5313 can also be put into a zero-off-

mode current state, drawing virtually no current when

disabled.

The MIC5313 is available in fixed output voltages in the

10-pin 2mm x 2mm Thin MLF

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 300mA output current for each LDO

• Dual low voltage regulator inputs: 1.7V to 5.5V

• Low output voltage range: 0.8V to 2.0V

• Ultra-low dropout voltage of 85mV @ 300mA

• Stable with 1µF ceramic output capacitors

• Very fast transient response

• Thermal shutdown and current limit protection

Applications

• Mobile Phones

• GPS and Navigation Devices

• Portable Media Players

• Digital still and video cameras

• PDAs

• Portable electronics

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Typical Application

VBAT

CBIAS

1µF

VIN1

CBYP

VIN2

EN2

VBIAS

EN1

VOUT2

VOUT1

MIC5313-xxYMT

GND

10nF

1µF

1µF

CIN

1µF

MIC23031-1.8YMT

DC-to-DC

Converter

VI/O

VCORE1

VCORE2

µProcessor