MIC5201
Micrel, Inc.
MIC5201
200mA Low-Dropout Regulator
General Description
Features
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.
• 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
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 if unneeded. When disabled, power consumption
IN
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.
• Logic-controlled electronic enable
• Available in SO-8 and SOT-223 packages
Applications
The MIC5201 is available in several fixed voltages and
accuracy configurations. It features the same pinout as the
LT1121withbetterperformance. Otheroptionsareavailable;
contact Micrel for details.
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery powered equipment
• PCMCIA V and V regulation/switching
CC
PP
• Bar code scanners
• SMPS post-regulator/ dc-to-dc modules
• High-efficiency linear power supplies
Ordering Information
Part Number
Standard
MIC5201BM
PbFree
Voltage
Adj.
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
MIC5201YM
MIC5201-3.0BM
MIC5201-3.3BM
MIC5201-5.0BM
MIC5201-3.0BS
MIC5201-3.3BS
MIC5201-4.8BS
MIC5201-5.0BS
MIC5201-3.0YM
MIC5201-3.3YM
MIC5201-5.0YM
MIC5201-3.0YS
MIC5201-3.3YS
MIC5201-4.8YS
MIC5201-5.0YS
3.0V
3.3V
5.0V
3.0V
3.3V
4.8V
5.0V
Other voltages available. Contact Micrel for details.
* Junction Temperature.
Typical Application
ENABLE
MIC5201-3.3
IN OUT
EN
SHUTDOWN
VOUT
3.3V
GND
1µF
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
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MIC5201