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MIC2951-3.3BM 参数 Datasheet PDF下载

MIC2951-3.3BM图片预览
型号: MIC2951-3.3BM
PDF下载: 下载PDF文件 查看货源
内容描述: 150毫安低压差稳压器 [150mA Low-Dropout Voltage Regulator]
分类和应用: 线性稳压器IC调节器电源电路光电二极管
文件页数/大小: 20 页 / 1056 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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MIC2950*/2951
150mA Low-Dropout Voltage Regulator
General Description
Features
The MIC2950 and MIC2951 are “bulletproof” micropower
High accuracy 3.3, 4.85, or 5V, guaranteed 150mA
voltage regulators with very low dropout voltage (typically
output
40mV at light loads and 250mV at 100mA), and very low
Extremely low quiescent current
quiescent current. Like their predecessors, the LP2950 and
Low-dropout voltage
LP2951, the quiescent current of the MIC2950/MIC2951
Extremely tight load and line regulation
increases only slightly in dropout, thus pro-longing battery
Very low temperature coefficient
life. The MIC2950/MIC2951 are pin for pin compatible with
Use as regulator or reference
the LP2950/LP2951, but offer lower dropout, lower
Needs only 1.5µF for stability
quiescent current, reverse battery, and automotive load
dump protection.
Current and thermal limiting
Unregulated DC input can withstand –20V reverse
The key additional features and protection offered include
battery and +60V positive transients
higher output current (150mA), positive transient protection
for up to 60V (load dump), and the ability to survive an
MIC2951 Version Only
unregulated input voltage transient of –20V below ground
Error flag warns of output dropout
(reverse battery).
Logic-controlled electronic shutdown
The plastic DIP and SOIC versions offer additional system
Output programmable from 1.24 to 29V
functions such as programmable output voltage and logic
controlled shutdown. The 3-pin TO-92 MIC2950 is pin-
compatible with the older 5V regulators.
Applications
These system functions also include an error
flag
output
Automotive electronics
that warns of a low output voltage, which is often due to
Voltage reference
failing batteries on the input. This may also be used as a
Avionics
power-on reset. A logic-compatible shutdown input is also
available which enables the regulator to be switched on and
Cellular telephones
off. This part may also be pin-strapped for a 5 V output, or
Battery powered equipment
programmed from 1.24 V to 29 V with the use of two
SMPS post-regulator
external resistors.
High efficiency linear power supplies
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Block Diagram
* MIC2950 Discontinuance September 2007.
MM8 is a registered 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
February 2010
M9999-021610