MIC5201BM 반도체 회로 부품 판매점
200mA Low-Dropout Voltage Regulator
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 Micrel Semiconductor |
MIC5201
Micrel
MIC5201
200mA Low-Dropout Voltage 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 VIN 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
• 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
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery powered equipment
• PCMCIA VCC and VPP regulation/switching
• Bar code scanners
• SMPS post-regulator/ dc-to-dc modules
• High-efficiency linear power supplies
Ordering Information
Part Number
Voltage Junction Temp. Range*
MIC5201BM
Adj –40°C to +125°C
MIC5201-3.0BM
3.0 –40°C to +125°C
MIC5201-3.3BM
3.3 –40°C to +125°C
MIC5201-5.0BM
5.0 –40°C to +125°C
MIC5201-3.0BS
3.0 –40°C to +125°C
MIC5201-3.3BS
3.3 –40°C to +125°C
MIC5201-4.8BS
4.85 –40°C to +125°C
MIC5201-5.0BS
5.0 –40°C to +125°C
Other voltages available. Contact Micrel for details.
* Junction Temperature.
Package
SO-8
SO-8
SO-8
SO-8
SOT-223
SOT-223
SOT-223
SOT-223
Typical Application
ENABLE
SHUTDOWN
MIC5201-3.3
IN OUT
EN
GND
VOUT
3.3V
1µF
MM8 is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
July 1998
1
MIC5201
MIC5201
Pin Configuration
GND
TAB
Micrel
OUT 1
ADJ 2
GND 3
NC 4
8 IN
7 NC
6 NC
5 EN
MIC5201BM
8-Lead SOIC
Adjustable
123
IN GND OUT
MIC5201-x.xBS
SOT-223
Fixed
OUT 1
NC 2
GND 3
NC 4
8 IN
7 NC
6 NC
5 EN
MIC5201-x.xBM
8-Lead SOIC
Fixed
Pin Description
Pin No.
SOT-223
3
Pin No. Pin No.
SO-8 Adj. SO-8 Fixed
11
2
4, 6, 7 2, 4, 6, 7
Pin Name
OUT
ADJ
NC
2 3 3 GND
55
EN
188
VIN
Pin Function
Regulated Output
Feedback Input: (Adjustable version only)
not internally connected: Connect to ground plane for lowest thermal
resistance.
Ground
Enable (Input): TTL compatible input. High = enable.
Low or open = off/disable.
Unregulated Supply Input
Absolute Maximum Ratings
Supply Input Voltage (VIN) Fixed .................. –20V to +60V
Supply Input Voltage (VIN) Adjustable .......... –20V to +20V
Enable Input Voltage (VEN) Fixed ................. –20V to +60V
Enable Input Voltage (VEN) Adjustable ......... –20V to +20V
Power Dissipation (PD) ............................ Internally Limited
Junction Temperature (TJ) ....................... –40°C to +125°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Operating Ratings
Supply Input Voltage (VIN) Fixed ................... 2.5V to +26V
Supply Input Voltage (VIN) Adjustable ........... 2.5V to +16V
Enable Input Voltage (VEN) .................................. 0V to VIN
Junction Temperature (TJ) ....................... –40°C to +125°C
MIC5201
2 July 1998
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MIC5201BM regulator
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