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MIC2937A 参数 Datasheet PDF下载

MIC2937A图片预览
型号: MIC2937A
PDF下载: 下载PDF文件 查看货源
内容描述: 750毫安低压差稳压器 [750mA Low-Dropout Voltage Regulator]
分类和应用: 稳压器
文件页数/大小: 12 页 / 254 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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MIC2937A/29371/29372
Micrel, Inc.
MIC2937A/29371/29372
750mA Low-Dropout Voltage Regulator
General Description
The MIC2937A family are “bulletproof” efficient voltage regu-
lators 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 in-
creases 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 posi-
tive 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.
Battery Powered Equipment
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
PCMCIA V
CC
and V
PP
Regulation/Switching
Bar Code Scanners
Automotive Electronics
SMPS Post-Regulator/ DC to DC Modules
High Efficiency Linear Power Supplies
Applications
Pin Configuration
INPUT GROUND OUTPUT
TO-263 Package
(MIC2937A-xxBU/WU)
Five Lead Package Pin Functions:
MIC29371 MIC29372
1) Error
Adjust
2) Input
Shutdown
3) Ground
Ground
4) Output
Input
5) Shutdown Output
TO-263-5 Package
(MIC29371/29372BU/WU)
1 2 3
1 2 3 4 5
INPUT GROUND OUTPUT
TO-220 Package
(MIC2937A-xxBT/WT)
1 2 3
1 2 3 4 5
TO-220-5 Package
(MIC29371/29372BT/WT)
The TAB is Ground on the TO-220 and TO-263 packages.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2006
1
MIC2937A/29371/29372