MIC5316
Low Voltage Dual 300mA LDO with
Power on Reset and Voltage Select
General Description
Features
The MIC5316 is a high performance, dual low input
voltage, low dropout regulator with Power On Reset (POR)
and voltage select. Major features include two 300mA
LDOs, input voltage down to 1.7V, ultra low drop out of
85mV at full load, Power on Reset, 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 further save power
while in stand-by mode. An adjustable delay time POR
output is provided for the second regulator for design
flexibility.
• 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
• 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
Ideal for battery operated applications; the MIC5316 offers
1% accuracy and low ground current to increase light load
efficiency. The MIC5316 can also be put into a zero-off-
mode current state, drawing virtually no current when
disabled.
• Mobile Phones
• GPS and Navigation Devices
• Portable Media Players
• Digital still and video cameras
• PDAs
The MIC5316 is available in fixed output voltages in the
12-pin 2.5mm x 2.5mm Thin MLF® leadless package.
• Portable electronics
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
VI/O
MIC5316-xxyYMT
MIC23031-1.8YMT
VBAT
VCORE1
VCORE2
DC-to-DC
Converter
VIN1
VOUT1
VIN2
VBIAS
/VSC2
EN1
VOUT2
POR2
CIN
1µF
CBIAS
1µF
CBYP
1µF
1µF
CSET2
EN2
µProcessor
10nF
GND
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
M9999-070208-A
July 2008