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MIC5309 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Low VIN/VOUT 300mA High PSRR ULDO™ with Ultra-Low IQ | |||
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MIC5309
Low VIN/VOUT 300mA High PSRR
ULDO⢠with Ultra-Low IQ
General Description
The MIC5309 is a high performance, µCap low dropout
regulator, offering ultra-low operating current while
maintaining very fast transient response. The MIC5309
can source up to 300mA of output current and can
regulate down from a low input supply voltage to increase
system efficiency.
Ideal for battery operated applications; the MIC5309 offers
extremely low dropout voltage 100mV typically @ 300mA
load, and low ground current at all load conditions
(typically 23µA). The MIC5309 can also be put into a zero-
off-mode current state, drawing virtually no current when
disabled.
The MIC5309 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
Micrelâs web site at: www.micrel.com.
Features
⢠Input voltage range: 1.7V to 5.5V
⢠Guaranteed 300mA over temperature
⢠Ultra Low dropout voltage of 100mV typical 300mA
⢠High PSRR, up to 90dB @ 1kHz
⢠Output Voltage range: 0.8V to 2.0V
⢠Very low ground current â 23µA under full load
⢠Bias supply voltage range: 2.5V to 5.5V
⢠Stable with 1µF ceramic output capacitor
⢠300mA maximum output current at 1.7V input voltage
⢠Very fast transient response â 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
CBIAS
CIN
1µF
1µF
MIC5309
BIAS
VIN VOUT
EN
GND
BYP
CBYP
10nF
COUT
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 +1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
November 2007
M9999-110807-B
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