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MIC5311 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – LowQ Mode Dual 300mA LDO | |||
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MIC5311
LowQ⢠Mode Dual 300mA LDO
General Description
The MIC5311 is a high performance, dual µCap low
dropout regulator 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.
Ideal for battery operated applications, the MIC5311
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 MIC5311
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.
The MIC5311 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
The MIC5311 is available in fixed output voltages in the
3mm x 3mm MLF-10 leadless package. Data sheets
and support documentation can be found on Micrelâs
web site at www.micrel.com.
Features
⢠Input voltage range: 2.5V to 5.5V
⢠LowQ⢠Mode
- 7µA total quiescent current
- 10mA output current capable LowQ⢠mode
- Logic level control with external pin
⢠Stable with ceramic output capacitor
⢠2 LDO Outputs â 300mA each
⢠Tiny 3mm x 3mm MLFâ¢-10 package
⢠Low dropout voltage of 60mV @ 150mA
⢠Ultra-low quiescent current of 28µA total in Full
Current Mode
⢠High output accuracy
- ±1.0% initial accuracy
- ±2.0% over temperature
⢠Thermal Shutdown Protection
⢠Current Limit Protection
Applications
⢠Cellular/PCS phones
⢠Wireless modems
⢠PDAs
⢠MP3 Players
Typical Application
VIN
EN1
EN2
LOWQ
BYP
GND
VOUT1
VOUT2
VCORE
VI/O
Baseband
µProcessor
MIC5311-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
February 2005
M9999-021105
(408) 955-1690
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