MIC5201
Micrel, Inc.
MIC5201
200mA Low-Dropout Regulator
General Description
The MIC5201 is an efficient linear voltage regulator with very
low dropout voltage (typically 17mV at light loads and 200mV
at 100mA), and very low ground current (1mA at 100mA
output), offering better than 1% initial accuracy with a logic
compatible on-off switching input.
Designed especially for hand-held battery powered devices,
the MIC5201 can be switched by a CMOS or TTL compatible
enable signal. This enable control may be connected directly
to V
IN
if unneeded. When disabled, power consumption
drops nearly to zero. The ground current of the MIC5201
increases only slightly in dropout, further prolonging battery
life. Key MIC5201 features include current limiting,
overtemperature shutdown, and protection against reversed
battery.
The MIC5201 is available in several fixed voltages and
accuracy configurations. It features the same pinout as the
LT1121 with better performance. Other options are available;
contact Micrel for details.
Features
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High output voltage accuracy
Variety of output voltages
Guaranteed 200mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Reversed-battery protection
Load-dump protection (fixed voltage versions)
Zero off-mode current
Logic-controlled electronic enable
Available in SO-8 and SOT-223 packages
Cellular telephones
Laptop, notebook, and palmtop computers
Battery powered equipment
PCMCIA V
CC
and V
PP
regulation/switching
Bar code scanners
SMPS post-regulator/ dc-to-dc modules
High-efficiency linear power supplies
Applications
Ordering Information
Standard
MIC5201BM
MIC5201-3.0BM
MIC5201-3.3BM
MIC5201-5.0BM
MIC5201-3.0BS
MIC5201-3.3BS
MIC5201-4.8BS
MIC5201-5.0BS
Part Number
PbFree
MIC5201YM
MIC5201-3.0YM
MIC5201-3.3YM
MIC5201-5.0YM
MIC5201-3.0YS
MIC5201-3.3YS
MIC5201-4.8YS
MIC5201-5.0YS
Voltage
Adj.
3.0V
3.3V
5.0V
3.0V
3.3V
4.8V
5.0V
Junction Temp.*
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
–40ºC to +125ºC
Package
SO-8
SO-8
SO-8
SO-8
SOT-223
SOT-223
SOT-223
SOT-223
Other voltages available. Contact Micrel for details.
* Junction Temperature.
Typical Application
ENABLE
SHUTDOWN
MIC5201-3.3
IN
EN
GND
1µF
OUT
V
OUT
3.3V
MM8 is a 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
June 2005
1
MIC5201
MICREL [ MICREL SEMICONDUCTOR ]
