MIC5319
500mA µCap Ultra-Low Dropout
High PSRR LDO Regulator
General Description
The MIC5319 is a high-performance, 500mA LDO
regulator, offering extremely high PSRR and very-low
noise while consuming low ground current.
Ideal for battery-operated applications, the MIC5319
features 1% accuracy, extremely low-dropout voltage
(200mV @ 500mA), and low ground current at light load
(typically 90µA). Equipped with a logic-compatible enable
pin, the MIC5319 can be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5319 is a µCap design operating with very-small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
The MIC5319 is available in fixed-output voltages and
adjustable output voltages in the super-compact 2mm x
2mm MLF
®
leadless package and thin SOT-23-5 package.
Data sheets and support documentation can be found on
Micrel’s web site at
Features
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Ultra-low dropout voltage 200mV @ 500mA
Input voltage range: 2.5 to 5.5V
Stable with ceramic output capacitor
Low output noise: 40µVrms
Low quiescent current of 90µA total
High PSRR, up to 70dB @1kHz
Fast turn-on-time: 40µs typical
High-output accuracy:
− ±1.0%
initial accuracy
− ±2.0%
over temperature
Thermal-shutdown protection
Current-limit protection
Logic-controlled Enable
Tiny 2mm x 2mm MLF
®
package, 500mA continuous
Thin SOT-23-5 package, 500mA peak
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Applications
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Cellular phones
PDAs
Fiber optic modules
Portable electronics
Notebook PCs
Audio Codec power supplies
Typical Application
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
May 2010
M9999-052510
MICREL [ MICREL SEMICONDUCTOR ]
