MIC5312
LowQ™ Mode Dual 300mA LDO
with Integrated POR
General Description
Features
• Input voltage range: 2.5V to 5.5V
• LowQ™ Mode
The MIC5312 is a high performance, dual µCap low
dropout regulator with integrated power-on reset
supervisor, offering ultra-low operating current and a
second, even lower operating current mode, LowQ™
mode, reducing operating current by 75%. Each
regulator can source up to 300mA of output current
maximum.
-
-
-
7µA total quiescent current
10mA output current capable LowQ™ mode
Logic level control with external pin
• Stable with ceramic output capacitor
• 2 LDO Outputs – 300mA each
• Integrated Power-on Reset (POR) with adjustable
Ideal for battery operated applications, the MIC5312
offers 1% accuracy, extremely low dropout voltage
(60mV @ 150mA), and low ground current (typically
28µA total). When put into LowQ™ mode, the internal
current draw drops down to 7µA total. The MIC5312
also comes equipped with a TTL logic compatible
enable pin that allows the part to be put into a zero-off-
mode current state, drawing no current when disabled.
delay time
• Tiny 3mm x 3mm MLF™-10 package
• Low dropout voltage of 60mV @ 150mA
• Ultra-low quiescent current of 28µA total in Full
Current Mode
• High output accuracy
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-
±1.0% initial accuracy
±2.0% over temperature
The Power-on Reset is active low and indicates an
output undervoltage condition on either regulator 1 or 2
when the regulator is enabled.
• Thermal Shutdown Protection
• Current Limit Protection
The MIC5312 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
The MIC5312 is available in fixed output voltages in the
3mm x 3mm MLF-10 leadless package. Data sheets
and support documentation can be found on Micrel’s
web site at www.micrel.com.
• MP3 Players
Typical Application
VIN
VOUT1
VCORE
VI/O
VOUT2
POR
EN1
EN2
Baseband
µProcessor
LOWQ
BYP
SET
GND
MIC5312-xxBML
MLF and MicroLeadFrame are 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
M9999-021105
(408) 955-1690
February 2005