MIC5237
500mA Low-Dropout Regulator
General Description Features
The MIC5237 is a general-purpose low-dropout regulator
Guaranteed 500mA output over the full operating
capable of 500mA output current with better than 3%
temperature range
output voltage accuracy. Using Micrels proprietary Super
Low 300mV typical dropout voltage at full load
eta PNP process with a PNP pass element, these
Extremely tight load and line regulation
regulators feature less than 300mV dropout voltage and
Current and thermal limiting
typically 8mA ground current at full load.
Reversed-battery protection
Designed for applications that require moderate current
over a broad input voltage range, including hand-held and TO-220 and TO-263 packages
battery-powered devices, the MIC5237 is intended for
Low temperature coefficient
applications that can tolerate moderate voltage drop at
No-load stability
higher current.
Low-noise output
Key features include low ground current to help prolong
battery life, reversed-battery protection, current limiting,
over-temperature shutdown, and thermally efficient Applications
packaging. The MIC5237 is available in fixed output
Portable and laptop computers
voltages only.
Desktop computer
For space-critical applications and improved performance,
Battery chargers
see the MIC5209 and MIC5219. For output current
requirements up to 750mA, see the MIC2937. SMPS post-regulator/dc-to-dc modules
Data sheets and support documentation can be found on Consumer and personal electronics
Micrels web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
Super eta 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 Micrel, Inc. MIC5237
Ordering Information
Part Number Voltage Junction Temp. Range Package
Standard Pb-Free
MIC5237-2.5BU MIC5237-2.5YU 2.5V 40 to +125C TO-263-3
MIC5237-3.3BU MIC5237-3.3YU 3.3V 40 to +125C TO-263-3
MIC5237-5.0BT MIC5237-5.0YT 5.0V 40 to +125C TO-220-3
MIC5237-5.0BU MIC5237-5.0YU 5.0V 40 to +125C TO-263-3
Pin Configuration
TO-220-3 (T) TO-263-3 (U)
Pin Description
Pin Number Pin Name Pin Function
1 IN Supply Input.
2, TAB GND Ground: TO-220 and TO-263 pin 2 and TAB are internally connected.
3 OUT Regulator Output.
M9999-090607-C
September 2007 2