MIC5216
500mA-Peak Output LDO Regulator
MM8 and Micrel Mini 8 are trademarks of Micrel, 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
March 2007
M9999-032307
General Description
The MIC5216 is an efficient linear voltage regulator with
high peak output current capability, very low dropout
voltage, and better than 1% output voltage accuracy.
Dropout is typically 10mV at light loads and less than
500mV at full load.
The MIC5216 is designed to provide a peak output current
for startup conditions where higher inrush current is
demanded. It features a 500mA peak output rating.
Continuous output current is limited only by package and
layout.
The MIC5216 has an internal undervoltage monitor with a
flag output. It also can be enabled or shutdown by a
CMOS or TTL compatible signal. When disabled, power
consumption drops nearly to zero. Dropout ground current
is minimized to help prolong battery life. Other key features
include reversed-battery protection, current limiting,
overtemperature shutdown, and low noise performance.
The MIC5216 is available in fixed output voltages in
space-saving SOT-23-5 and MM8™ 8-pin power MSOP
packages. For higher power requirements see the
MIC5209 or MIC5237.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Error Flag indicates undervoltage fault
• Guaranteed 500mA-peak output over the full operating
temperature range
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Tiny SOT-23-5 and MM8™ power MSOP-8 package
• Low-noise output
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• CMOS/TTL-compatible enable/shutdown control
• Near-zero shutdown current
Applications
• Laptop, notebook, and palmtop computers
• Cellular telephones and battery-powered equipment
• Consumer and personal electronics
• PC Card V
CC
and V
PP
regulation and switching
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
Typical Application
5V Low-Noise Regulator
3.3V Low-Noise Regulator
