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MIC2954-08YM PDF预览

MIC2954-08YM

更新时间: 2024-11-22 10:57:11
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器调节器光电二极管输出元件PC
页数 文件大小 规格书
15页 521K
描述
250mA Low-Dropout Regulator

MIC2954-08YM 数据手册

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MIC2954  
250mA Low-Dropout Regulator  
General Description  
Features  
The MIC2954 is a “bulletproof” efficient voltage regulator  
with very low dropout voltage (typically 40mV @ light loads  
and 375mV @ 250mA), and low quiescent current (120µA  
typical). The quiescent current of the MIC2954 increases  
only slightly in dropout, thus prolonging battery life. Key  
MIC2954 features include protection against reversed  
battery, fold-back current limiting, and automotive load  
dump protection (60V positive transient).  
High-accuracy 5V, guaranteed 250mA 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  
The MIC2954-07/08BM is an adjustable version that  
includes an error flag output that warns of a low output  
voltage, which is often due to failing batteries on the input.  
This may also be used as a power-on reset. A logic-  
compatible shutdown input is provided which enables the  
regulator to be switched on and off. This part may be pin-  
strapped for 5V output, or programmed from 1.24V to 29V  
with the use of two external resistors.  
Error flag warns of low output voltage  
Logic-controlled electronic shutdown  
Output programmable from 1.24V to 29V  
(MIC2954-07/08)  
Available in TO-220, TO-92, and surface-mount SOT-  
223 and SOIC-8 packages  
Applications  
The MIC2954 is available in two voltage tolerances, ±0.5%  
maximum and ±1% maximum. Both are guaranteed for  
junction temperatures from –40°C to +125°C.  
Battery powered equipment  
Cellular telephones  
Laptop, notebook, and palmtop computers  
PCMCIA VCC and VPP regulation/switching  
Bar code scanners  
Data sheets and support documentation can be found on  
Micrel’s web site at www.micrel.com.  
Automotive electronics  
SMPS post-regulator/dc-to-dc modules  
Voltage reference  
High-efficiency linear power supplies  
___________________________________________________________________________________________________________  
Ordering Information  
Part Number  
Junction  
Pb-Free /  
Accuracy  
0.5%  
Temp. Range  
Package  
TO-220-3  
TO-220-3  
SOT-223-3  
SOT-223-3  
TO-92-3**  
TO-92-3**  
8-Pin SOIC  
8-Pin SOIC  
Standard  
RoHS Compliant  
MIC2954-02BT  
MIC2954-03BT  
MIC2954-02BS  
MIC2954-03BS  
MIC2954-02BZ  
MIC2954-03BZ  
MIC2954-07BM  
MIC2954-08BM  
MIC2954-02WT*  
MIC2954-03WT*  
MIC2954-02WS*  
MIC2954-03WS*  
MIC2954-02YZ  
MIC2954-03YZ  
MIC2954-07YM  
MIC2954-08YM  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
–40° to +125°C  
1.0%  
0.5%  
1.0%  
0.5%  
1.0%  
0.5%  
1.0%  
*
RoHS compliant with ‘high-melting solder’ exemption.  
** TO-92 package discontinuance notification issued September 2007. End-of-life-buy offered thru December 31, 2007.  
Contact factory for additional information.  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-090607  
September 2007  

MIC2954-08YM 替代型号

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