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SPX2954AU3-L-3.3 PDF预览

SPX2954AU3-L-3.3

更新时间： 2024-11-29 06:12:31
品牌 Logo 应用领域
艾科嘉 - EXAR /
页数 文件大小 规格书
7页 206K
描述
Fixed Positive LDO Regulator, 3.3V, 0.6V Dropout, PSFM3, TO-220, 3 PIN

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SPX2954AU3-L-3.3 数据手册

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SPX2954  
250 mA Low Drop Out Voltage Regulator  
FEATURES  
APPLICATIONS  
• Output Accuracy 5V, 3.3V,@ 250mA Output  
• Very Low Quiescent Current  
• Battery Powered Systems  
• Cordless Telephones  
• Low Dropout Voltage  
• Radio Control Systems  
• Portable/Palm Top/Notebook Computers  
• Portable Consumer Equipment  
• Portable Instrumentation  
• Automotive Electronics  
• SMPS Post-Regulator  
• Extremely Tight Load And Line Regulation  
• Very Low Temperature Coefficient  
• Current & Thermal Limiting  
• Improved Replacement With Hight IOUT For LP2954 Sockets  
• Voltage Reference  
• Avionics  
SPX2954 Version Over LP2954  
• Error Flag Warns Of Output Dropout  
• Logic-Controlled Electronic Shutdown  
• Output Programmable From 1.24V to 29V  
• Input Can Withstand -20V Reverse Battery & +60 Positive Transient  
PRODUCT DESCRIPTION  
The SPX2954 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as  
cordless telephones, radio control systems, and portable computers. The SPX2954 features very low quiescent current (75µA Typ.)  
and very low dropout voltage. This includes a tight initial tolerance of 0.5% max and 1% max., and very low output temperature  
coefficient, making the SPX2954 useful as a low-power voltage reference. The key SPX2954 features include protection against  
reversed battery, fold-back current limiting, and automotive load dump protection (60V positive transient).  
The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries.  
Another feature is the logic compatible shutdown input which enables the regulator to be switched on and off. The SPX2954 is offered  
in a 3-pin TO-92and TO-263 package compatible with other 5 volt regulators, in 8-Pin plastic, SO-8, (same pin out as SPX2951), TO-  
220 and TO-263.  
The regulator output voltage (of the 8-pin) may be pin-strapped for a 5Vand 3.3V or programmed from 1.24V to 29V with an external  
pair of resistors. Look for SPX2951 for 150mA and LP2951 for 100mA applications.  
PIN CONNECTIONS  
TO-263-3 Package  
SPX2954  
TO-263-5 Package  
SPX2954  
8-Pin Surface Mount (S)  
TO-220-3 Package  
SPX2954  
TO-220-5 Packa
SOT-223 Package  
INPUT  
OUTPUT  
1
2
3
4
8
7
6
5
SENSE  
FEEDBACK  
5V, 3.3V TAP  
ERROR  
SPX2954  
SPX2954  
SHUTDOWN  
GND  
SPX2954  
1
2
3
1
2
3
1
2
3
4
5
1)  
INPUT  
1)  
INPUT  
2) OUTPUT  
OUTPUT  
GND  
2)  
3)  
4)  
5)  
3)  
4)  
5)  
GND  
SHUTDOWN  
ERROR  
GND  
V
V
Top View  
TO-92 (N)  
IN  
OUT  
SHUTDOWN  
ERROR  
Front View  
V
VIN  
VOUT  
ADJ  
1
VIN  
2
3
V
1
2
3 4  
5
2
1
3
Top View  
Top View  
GND  
OUT  
Front View  
Front View  
OUTPUT  
INPUT  
GND  
Bottom View  
Rev. 11/21/00  
1234567

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