MIC5315 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – Low Voltage Dual 300mA LDO with Voltage Select

MIC5315
Low Voltage Dual 300mA LDO
with Voltage Select
General Description
The MIC5315 is a high performance, dual low input
voltage, low dropout regulator with voltage select. Major
features include two 300mA LDOs, input voltage down to
1.7V, ultra low drop out of 85mV at full load, and voltage
select. Each LDO has its own low voltage input for system
flexibility. The low input voltages and low drop out
operation provides high efficiency by reducing the input to
output voltage step which minimizes the regulator power
loss. Voltage select is incorporated into the second output,
which reduces the output voltage to a lower level to further
save power while in stand-by mode.
Ideal for battery operated applications; the MIC5315 offers
1% accuracy and low ground current to increase light load
efficiency. The MIC5315 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
The MIC5315 is available in fixed output voltages in the
10-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
• 300mA output current for each LDO
• Dual low voltage regulator inputs: 1.7V to 5.5V
• Low output voltage range: 0.8V to 2.0V
• Ultra-low dropout voltage of 85mV @ 300mA
• Voltage select function
• Stable with 1µF ceramic output capacitors
• Very fast transient response
• Thermal shutdown and current limit protection
• Tiny 10-pin 2mm x 2mm Thin MLF^® package
Applications
• Mobile Phones
• GPS and Navigation Devices
• Portable Media Players
• Digital still and video cameras
• PDAs
• Portable electronics
___________________________________________________________________________________________________________
Typical Application
VBAT
MIC23031-1.8YMT
DC-to-DC
Converter
CIN
CBIAS
1µF
1µF
MIC5315-xxyYMT
VIN1
VIN2
VOUT1
VBIAS
VOUT2
/VSC2
EN1
CBYP
EN2
GND
VI/O
VCORE1
VCORE2
1µF
1µF
10nF
µProcessor
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
July 2008
M9999-070208-A