MIC5308_08 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Low VIN/VOUT 150mA High PSRR ULDO with Ultra-Low IQ

MIC5308
Low V_IN/V_OUT 150mA High PSRR
ULDO™ with Ultra-Low IQ
General Description
The MIC5308 is a high performance, µCap low dropout
regulator, offering ultra-low operating current while
maintaining very fast transient response. The MIC5308
can source up to 150mA of output current and can
regulate down from a low input supply voltage to increase
system efficiency.
Ideal for battery operated applications; the MIC5308 offers
extremely low dropout voltage 45mV typically @ 150mA,
and low ground current at all load conditions (typically
23µA). The MIC5308 can also be put into a zero-off-mode
current state, drawing virtually no current when disabled.
The MIC5308 is available in fixed output voltages in the
tiny 6-pin 1.6mm x 1.6mm thin MLF^® leadless package as
well as the 6-pin TSOT-23 for cost sensitive applications.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Input voltage range: 1.6V to 5.5V
• Guaranteed 150mA over temperature
• Ultra Low dropout voltage of 45mV at 150mA
• High PSRR, up to 90dB @ 1kHz
• Output Voltage range: 0.8V to 2.0V
• Very low ground current – 23µA under full load
• Bias supply voltage range: 2.5V to 5.5V
• Stable with 1µF ceramic output capacitor
• 150mA maximum output current at 1.6V input voltage
• Very fast transient response – ideal for digital loads
• Thermal shutdown and current limit protection
• Tiny 6-pin 1.6mm x 1.6mm Thin MLF^® package
• Cost effective 6-pin TSOT-23 package
Applications
• Mobile Phones
• PDAs
• GPS Receivers
• Portable Electronics
___________________________________________________________________________________________________________
Typical Application
Li-Ion
2.7V to 4.2V
MIC23050
DC-to-DC
Converter
C_BIAS
C_IN
1µF
1µF
MIC5308
BIAS
VIN VOUT
EN
GND
BYP
1.2V / 150mA
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
May 2008
M9999-051508-D