MIC5357
High Performance, Low Noise Dual
500mA ULDO
General Description Features
The MIC5357 is a tiny Dual Ultra Low Dropout (ULDO) 2.6V to 5.5V input voltage range
linear regulator ideally suited for portable electronics due
Ultra low dropout voltage: 130mV @ 500mA
to its low output noise. The MIC5357 provides two
Ultra low output noise: 51V
RMS
independently controlled high performance 500mA LDOs
2% initial output accuracy
with typical dropout voltage of 130mV at rated load. In
addition, the MIC5357 provides a bypass pin to reduce the Small 8-pin ePad MSOP package
output noise.
Excellent Load/Line transient response
The MIC5357 is designed to be stable with small ceramic
Fast start up time: 38s
output capacitors thereby reducing required board space
Cap stable with 2.2F ceramic capacitors
and component cost. The combination of extremely low
Thermal shutdown protection
dropout voltage, low output noise and exceptional thermal
Low quiescent current: 160A with both outputs at
package characteristics makes it ideal for powering RF
maximum load
and noise sensitive circuitry, cellular phone camera
modules, imaging sensors for digital still cameras, PDAs,
Current-limit protection
MP3 players and WebCam applications.
The MIC5357 ULDO is available in fixed output voltages
Applications
in the small 8-pin ePad MSOP package. Additional voltage
options are available. For more information, contact Micrel
Battery-Powered Applications
marketing.
PDAs
Data sheets and support documentation can be found on
GPS receivers
Micrels web site at: www.micrel.com.
Portable electronics
Portable media players
Digital still and video cameras
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Typical Application
RF Power Supply Circuit
ULDO is a trademark of Micrel, Inc
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5357
Block Diagram
M9999-011311
January 2011 2