MIC5337 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 1.2mm x 1.6mm 300mA Low IQ LDO Ultra Low Dropout with Auto Discharge

MIC5337
1.2mm x 1.6mm 300mA Low I_Q LDO
Ultra Low Dropout with Auto Discharge
General Description
The MIC5337 is a low quiescent current, low dropout
regulator with an internal auto discharge feature designed
for optimal performance in a small space. The MIC5337 is
capable of sourcing 300mA of output current while only
consuming 24µA of operating current. When the MIC5337
is disabled an internal resistive load is automatically
applied to the output to discharge the output capacitor.
This high performance LDO offers fast transient response
as well as maintaining a high PSRR.
The MIC5337 is an ideal solution for battery operated
applications due to ultra low operating current and
extremely low dropout voltage of 180mV at 300mA.
Equipped with a TTL logic compatible enable pin, the
MIC5337 can be put into a zero-off-mode current state,
drawing virtually no current when disabled.
Board space and component cost is minimized because
the MIC5337 operates with very small 1μF ceramic
capacitors, provides fixed output voltages, and is available
in the tiny 1.2mm x 1.6mm Thin MLF package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• 300mA output current
• Low I_Q: only 24µA operating current
• Low dropout voltage of 180mV @ 300mA
• Active discharge when enable pin is low
• Input voltage range: 2.3V to 5.5V
• Fixed output voltages
• Stable with 1μF ceramic capacitors
• Thermal shutdown and current limit protection
• Tiny 4-pin 1.2mm x 1.6mm Thin MLF^® package
Applications
• Mobile phones
• GPS and navigation devices
• Portable media players
• Digital still and video cameras
• PDAs
• Portable electronics
___________________________________________________________________________________________________________
Typical Application
MIC5337-xxYMT
VIN
VOUT
VOUT
VBAT
1µF
VEN
1µF
GND
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
September 2008
M9999-090908-A