MIC5314 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – Low Voltage Dual 300mA LDO with Power on Reset

MIC5314
Low Voltage Dual 300mA LDO
with Power on Reset
General Description
The MIC5314 is a high performance, dual low input
voltage, low dropout regulator with Power On Reset
(POR). Major features include two 300mA LDOs, input
voltage down to 1.7V, ultra low drop out of 85mV at full
load, and Power On Reset. 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. An adjustable delay time POR
output is provided for the second regulator for design
flexibility.
Ideal for battery operated applications; the MIC5314 offers
1% accuracy and low ground current to increase light load
efficiency. The MIC5314 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
The MIC5314 is available in fixed output voltages in the
12-pin 2.5mm x 2.5mm 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
• Power On Reset output with adjustable delay
• Stable with 1µF ceramic output capacitors
• Very fast transient response
• Thermal shutdown and current limit protection
• Tiny 12-pin 2.5mm x 2.5mm 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
MIC5314-xxYMT
VIN1
VIN2
VOUT1
VBIAS
VOUT2
POR2
EN1
CBYP
EN2
CSET2
GND
VI/O
1µF
10nF
VCORE1
VCORE2
/RST
1µF
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