MIC29371 Voltage Regulator Datasheet

MIC29371 Datasheet, PDF, Equivalent


Part Number

MIC29371

Description

750mA Low-Dropout Voltage Regulator

Manufacture

Micrel Semiconductor

Total Page 9 Pages
Datasheet
Download MIC29371 Datasheet


MIC29371
MIC2937A/29371/29372
Micrel
MIC2937A/29371/29372
750mA Low-Dropout Voltage Regulator
General Description
The MIC2937A family are “bulletproof” efficient voltage
regulators with very low dropout voltage (typically 40mV at
light loads and 300mV at 500mA), and very low quiescent
current (160µA typical). The quiescent current of the MIC2937A
increases only slightly in dropout, thus prolonging battery life.
Key MIC2937A features include protection against reversed
battery, fold-back current limiting, and automotive “load dump”
protection (60V positive transient).
The MIC2937 is available in several configurations. The
MIC2937A-xx devices are three pin fixed voltage regulators
with 3.3V, 5V, and 12V outputs available. The MIC29371 is a
fixed regulator offering logic compatible ON/OFF switching
input and an error flag output. This flag may also be used as
a power-on reset signal. A logic-compatible shutdown input is
provided on the adjustable MIC29372, which enables the
regulator to be switched on and off.
Features
• High output voltage accuracy
• Guaranteed 750mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Input can withstand –20V reverse battery and +60V
positive transients
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24V to 26V(MIC29372)
• Available in TO-220, TO-263, TO-220-5, and TO-263-5
packages.
Applications
• Battery Powered Equipment
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• PCMCIA VCC and VPP Regulation/Switching
• Bar Code Scanners
• Automotive Electronics
• SMPS Post-Regulator/ DC to DC Modules
• High Efficiency Linear Power Supplies
Pin Configuration
INPUT GROUND OUTPUT
TO-263 Package
(MIC2937A-xxBU)
1 2345
TO-263-5 Package
(MIC29371/29372BU)
Five Lead Package Pin Functions:
MIC29371 MIC29372
1) Error
Adjust
2) Input
Shutdown
3) Ground Ground
4) Output
Input
5) Shutdown Output
12 3
INPUT FGrRonOtUVNieDw OUTPUT
1 2345
TO-220 Package
(MIC2937A-xxBT)
TO-220-5 Package
(MIC29371/29372BT)
The TAB is Ground on the TO-220 and TO-263 packages.
3-18
June 1997

MIC29371
MIC2937A/29371/29372
Ordering Information
Part Number
MIC2937A-3.3BU
MIC2937A-3.3BT
MIC2937A-5.0BU
MIC2937A-5.0BT
MIC2937A-12BU
MIC2937A-12BT
MIC29371-3.3BT
MIC29371-3.3BU
MIC29371-5.0BT
MIC29371-5.0BU
MIC29371-12BT
MIC29371-12BU
MIC29372BT
MIC29372BU
Voltage
3.3
3.3
5.0
5.0
12
12
3.3
3.3
5.0
5.0
12
12
Adj
Adj
Temperature 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
–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
–40°C to +125°C
–40°C to +125°C
Package
TO-263-3
TO-220
TO-263-3
TO-220
TO-263-3
TO-220
TO-220-5
TO-263-5
TO-220-5
TO-263-5
TO-220-5
TO-263-5
TO-220-5
TO-263-5
* Junction temperatures
Micrel
Absolute Maximum Ratings
If Military/Aerospace specified devices
are required, contact your local Micrel
representative/distributor for availability
and specifications.
Power Dissipation (Note 1) .............. Internally Limited
Lead Temperature (Soldering, 5 seconds) ........ 260°C
Storage Temperature Range ............ –65°C to +150°C
Operating Junction Temperature Range
................................................. –40°C to +125°C
TO-220 θJC ...................................................... 2.5°C/W
TO-263 θJC ...................................................... 2.5°C/W
Input Supply Voltage ............................... –20V to +60V
Operating Input Supply Voltage ................... 2Vto 26V
Adjust Input Voltage (Notes 9 and 10)
...................................................... –1.5V to +26V
Shutdown Input Voltage ......................... –0.3V to +30V
Error Comparator Output Voltage .......... –0.3V to +30V
Across the full operating temperature, the minimum
input voltage range for full output current is 4.3V to 26V.
Output will remain in-regulation at lower output voltages
and low current loads down to an input of 2V at 25°C.
3
June 1997
3-19


Features MIC2937A/29371/29372 Micrel MIC2937A/29 371/29372 750mA Low-Dropout Voltage Reg ulator General Description The MIC2937 A family are “bulletproof” efficien t voltage regulators with very low drop out voltage (typically 40mV at light lo ads and 300mV at 500mA), and very low q uiescent current (160µA typical). The quiescent current of the MIC2937A incre ases only slightly in dropout, thus pro longing battery life. Key MIC2937A feat ures include protection against reverse d battery, fold-back current limiting, and automotive “load dump” protecti on (60V positive transient). The MIC293 7 is available in several configuration s. The MIC2937A-xx devices are three pi n fixed voltage regulators with 3.3V, 5 V, and 12V outputs available. The MIC29 371 is a fixed regulator offering logic compatible ON/OFF switching input and an error flag output. This flag may als o be used as a power-on reset signal. A logic-compatible shutdown input is pro vided on the adjustable MIC29372, which enables the regulator to be swit.
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