MIC5237
500mA Low-Dropout Regulator
Super βeta PNP is a registered trademark 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
September 2007
M9999-090607-C
General Description
The MIC5237 is a general-purpose low-dropout regulator
capable of 500mA output current with better than 3%
output voltage accuracy. Using Micrel’s proprietary Super
ßeta PNP
®
process with a PNP pass element, these
regulators feature less than 300mV dropout voltage and
typically 8mA ground current at full load.
Designed for applications that require moderate current
over a broad input voltage range, including hand-held and
battery-powered devices, the MIC5237 is intended for
applications that can tolerate moderate voltage drop at
higher current.
Key features include low ground current to help prolong
battery life, reversed-battery protection, current limiting,
over-temperature shutdown, and thermally efficient
packaging. The MIC5237 is available in fixed output
voltages only.
For space-critical applications and improved performance,
see the MIC5209 and MIC5219. For output current
requirements up to 750mA, see the MIC2937.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Guaranteed 500mA output over the full operating
temperature range
• Low 300mV typical dropout voltage at full load
• Extremely tight load and line regulation
• Current and thermal limiting
• Reversed-battery protection
• TO-220 and TO-263 packages
• Low temperature coefficient
• No-load stability
• Low-noise output
Applications
• Portable and laptop computers
• Desktop computer
• Battery chargers
• SMPS post-regulator/dc-to-dc modules
• Consumer and personal electronics
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Typical Application