MIC5355 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – Dual 500mA μCap Low Dropout, Micropower Linear Regulator

MIC5355/6
Dual 500mA µCap Low Dropout,
Micropower Linear Regulator
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^® package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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^® package
Applications
 Smart phones
 GPS, PMP, DSC
 Notebooks and desktops
 Digital TV
 Portable electronics
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Typical Application
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 2012
M9999-031512-A