MIC5325 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Low VIN/VOUT 400mA ULDO™ with Ultra-Low IQ

MIC5325
Low V_IN/V_OUT 400mA ULDO™
with Ultra-Low IQ
General Description
The MIC5325 is a high performance, µCap low dropout
regulator, offering ultra-low operating current while
maintaining very fast transient response. The MIC5325
can source up to 400mA of output current and allows a low
input supply voltage source to increase system efficiency.
Ideal for battery operated applications; the MIC5325 offers
high accuracy, extremely low dropout voltage, and low
ground current at all load conditions. The MIC5325 can
also be put into a zero-off-mode current state, drawing
virtually no current when disabled.
The MIC5325 is available in fixed output voltages in the
6-pin 2mm x 2mm Thin MLF^® leadless package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Wide input voltage range: 1.7V to 5.5V
• Stable with 1µF ceramic output capacitor
• Ultra-low dropout voltage ULDO™ 110mV @ 400mA
• ±2% voltage accuracy over temperature
• Bias supply voltage range: 2.5V to 5.5V
• Adjustable output voltage range: 0.8V to 2.0V
• Ultra-low ground current 35µA typical
• 400mA maximum output current per LDO
• Very fast transient response
• Thermal shutdown and current limit protection
• Tiny 6-pin 2mm x 2mm Thin MLF^® package
Applications
• Low power handheld devices
• Portable electronics
• GPS receivers
• Post regulator
___________________________________________________________________________________________________________
Typical Application
Li-ion
2.7...4.2V
MIC23050
High Efficiency
DC-to-DC
Buck
C_BIAS
C_IN
1µF 1µF
MIC5325-xxYMT
VBIAS
VIN
VOUT
EN
GND
BYP
C_BYP
10nF
C_OUT
1µF
ULDO is a trademark of Micrel, Inc
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
April 2008
M9999-040308-A