MIC5237 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 500mA Low-Dropout Regulator Preliminary Information

MIC5237
Micrel
MIC5237
500mA Low-Dropout Regulator
Preliminary Information
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 regu-
lators 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 require-
ments up to 750mA, see the MIC2937.
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
Typical Application
Ordering Information
Part Number
MIC5237-2.5BT
MIC5237-2.5BU
MIC5237-3.3BT
MIC5237-3.3BU
MIC5237-5.0BT
MIC5237-5.0BU
Voltage
2.5V
2.5V
3.3V
3.3V
5.0V
5.0V
Junct. Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
TO-220
TO-263
TO-220
TO-263
TO-220
TO-263
V_IN
≥5.6V
1.0µF
MIC5237-5.0
IN
OUT
V_OUT
5.0V ±3%
GND
1.0µF
tantalum
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
January 2000
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MIC5237