MIC5201 Micrel, Inc.
MIC5201
200mA Low-Dropout Regulator
General Description Features
The MIC5201 is an efficient linear voltage regulator with very High output voltage accuracy
low dropout voltage (typically 17mV at light loads and 200mV Variety of output voltages
at 100mA), and very low ground current (1mA at 100mA Guaranteed 200mA output
output), offering better than 1% initial accuracy with a logic Low quiescent current
compatible on-off switching input. Low dropout voltage
Extremely tight load and line regulation
Designed especially for hand-held battery powered devices,
Very low temperature coefficient
the MIC5201 can be switched by a CMOS or TTL compatible
Current and thermal limiting
enable signal. This enable control may be connected directly
Reversed-battery protection
to V if unneeded. When disabled, power consumption
IN
Load-dump protection (fixed voltage versions)
drops nearly to zero. The ground current of the MIC5201
Zero off-mode current
increases only slightly in dropout, further prolonging battery
Logic-controlled electronic enable
life. Key MIC5201 features include current limiting,
Available in SO-8 and SOT-223 packages
overtemperature shutdown, and protection against reversed
battery.
Applications
The MIC5201 is available in several fixed voltages and
Cellular telephones
accuracy configurations. It features the same pinout as the
Laptop, notebook, and palmtop computers
LT1121 with better performance. Other options are available;
Battery powered equipment
contact Micrel for details.
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 PbFree Voltage Junction Temp.* Package
MIC5201BM MIC5201YM Adj. 40C to +125C SO-8
MIC5201-3.0BM MIC5201-3.0YM 3.0V 40C to +125C SO-8
MIC5201-3.3BM MIC5201-3.3YM 3.3V 40C to +125C SO-8
MIC5201-5.0BM MIC5201-5.0YM 5.0V 40C to +125C SO-8
MIC5201-3.0BS MIC5201-3.0YS 3.0V 40C to +125C SOT-223
MIC5201-3.3BS MIC5201-3.3YS 3.3V 40C to +125C SOT-223
MIC5201-4.8BS MIC5201-4.8YS 4.8V 40C to +125C SOT-223
MIC5201-5.0BS MIC5201-5.0YS 5.0V 40C to +125C SOT-223
Other voltages available. Contact Micrel for details.
* Junction Temperature.
Typical Application
ENABLE
MIC5201-3.3
SHUTDOWN
V
OUT
IN OUT
3.3V
EN
GND
1F
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 MIC5201 Micrel, Inc.
Pin Configuration
GND
TAB
132
IN GND OUT
MIC5201-x.xBS
OUT 1 8 IN
OUT 1 8 IN
SOT-223
Fixed
2 7
2 7 NC NC
ADJ NC
GND 3 6 NC
GND 3 6 NC
NC 4 5 EN
NC 4 5 EN
MIC5201-x.xBM
MIC5201BM
8-Lead SOIC
8-Lead SOIC
Fixed
Adjustable
Pin Description
Pin No. Pin No. Pin No. Pin Name Pin Function
SOT-223 SO-8 Adj. SO-8 Fixed
311 OUT Regulated Output
2 ADJ Feedback Input: (Adjustable version only)
4, 6, 7 2, 4, 6, 7 NC not internally connected: Connect to ground plane for lowest thermal
resistance.
233 GND Ground
55 EN Enable (Input): TTL compatible input. High = enable.
Low or open = off/disable.
188 V Unregulated Supply Input
IN
Absolute Maximum Ratings Operating Ratings
Supply Input Voltage (V ) Fixed .................. 20V to +60V Supply Input Voltage (V ) Fixed ................... 2.5V to +26V
IN IN
Supply Input Voltage (V ) Adjustable .......... 20V to +20V Supply Input Voltage (V ) Adjustable ........... 2.5V to +16V
IN IN
Enable Input Voltage (V ) Fixed ................. 20V to +60V Enable Input Voltage (V ) .................................. 0V to V
EN EN IN
Enable Input Voltage (V ) Adjustable ......... 20V to +20V Junction Temperature (T ) ....................... 40C to +125C
EN J
Power Dissipation (P ) ............................ Internally Limited
D
Junction Temperature (T ) ....................... 40C to +125C
J
Lead Temperature (soldering, 5 sec.) ....................... 260C
MIC5201 2 June 2005