MIC5355/6

Dual 500mA µCap Low Dropout,

Micropower Linear Regulator

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

March 2012

M9999-031512-A

General Description

The MIC5355/6 is an advanced dual, micropower, low

dropout linear regulator. The MIC5355/6 provides low

quiescent current operation, using only 70μA with both

outputs enabled making it ideal for battery-powered

systems. In shutdown, the quiescent current drops to less

than 1µA. The MIC5355/6 provides two independently-

controlled high-performance 500mA LDOs with typical

dropout voltage of 350mV at rated load. In addition, the

MIC5355/6 is optimized to provide fast load and line

transient performance with low-ESR ceramic output

capacitors, requiring a minimum of only 2.2µF.

The MIC5356 also incorporates an active discharge

feature when the part is disabled that switches in a 30Ω

load to pull down the output of the regulator. The

MIC5355/6 is available in fixed output voltages in a

thermally-enhanced 8-pin ePad MSOP package or 8-pin

ePad 3mm x 3mm MLF

Data sheets and support documentation can be found on

Features

 2.5V to 5.5V input voltage range

 2% initial output accuracy

 Wide output voltage range: 1.0V to 3.3V

 Low quiescent current: 38µA per output

 Very low quiescent current in shutdown: <1μA typical

 µCap stable with 2.2µF ceramic capacitor

 Low dropout voltage: 350mV at 500mA

 Excellent load/line transient response

 Independent logic controlled enable pins

 Output discharge circuit: MIC5356

 Current and thermal limit protection

 Power 8-pin ePad MSOP package or 8-pin ePad 3mm

x 3mm MLF

Applications

 Smart phones

 GPS, PMP, DSC

 Notebooks and desktops

 Digital TV

 Portable electronics

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Typical Application