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LP2950CT-3.3 PDF预览

LP2950CT-3.3

更新时间： 2024-09-17 22:46:59
品牌 Logo 应用领域
西伯斯 - SIPEX 稳压器
页数 文件大小 规格书
13页 441K
描述
100 mA Low Dropout Voltage Regulators

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LP2950CT-3.3 数据手册

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LP2950/LP2951  
100mA Low Dropout Voltage Regulators  
FEATURES  
• 5.0V and 3.3V Versions at 100mA Output  
• Very Low Quiescent Current  
APPLICATIONS  
• Battery Powered Systems  
• Cordless Telephones  
• Low Dropout Voltage: 380mV at 100mA  
• Extremely Tight Load and Line Regulation  
• Very Low Temperature Coefficient  
• Current & Thermal Limiting  
• Radio Control Systems  
• Portable/Palm Top/Notebook Computers  
• Portable Consumer Equipment  
• Portable Instrumentation  
• Avionics  
• Need Only 1 µF for Stability  
• Offered in TO-92 (LP2950) & SOIC (LP2951)  
• Direct Replacement For LP2950/LP2951  
• SMPS Post-Regulator  
• Voltage Reference  
• Automotive Electronics  
LP2951 versions only  
• Error Flag Warns of Output Dropout  
• Logic-Controlled Electronic Shutdown  
• Output Programmable From 1.24 to 29V  
Now Available in Lead Free Packaging  
PRODUCT DESCRIPTION  
The LP2950 and LP2951 are low power voltage regulators. These devices are an excellent choice for use in battery-powered  
applications such as cordless telephones, radio control systems, and portable computers. The LP2950 and LP2951 feature low  
quiescent current and low dropout voltage (typ. 50mV at light load and 380 mV at 100mA). This includes a tight initial tolerance  
(0.5% typ.), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/¡C typ.),  
making the LP2950/LP2951 useful as a low-power voltage reference.  
The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling input voltage. The logic-  
compatible shutdown feature enables the regulator to be switched ON and OFF. The LP2950 is offered in a 3-pin TO-92 package  
compatible with other 5V, 3.3V regulators. The LP2951 is available in an 8-lead SOIC package.  
Block diagram of LP2951  
UNREGULATED DC  
5V @ 100mA  
MAX  
1
7
8
+
INPUT  
FEEDBACK  
OUTPUT  
2
SENSE  
180k  
Ω
+
_
6
ERROR  
3
FROM  
CMOS OR  
TTL  
AMPLIFIER  
330k  
Ω
5V TAP  
SHUTDOWN  
+
60 mV  
60k  
Ω
1µF  
.
5
______  
ERROR  
+
+
_
.
ERROR DETECTION  
COMPARATOR  
TO CMOS OR  
TTL  
1.23V  
+
4
REFERENCE  
GROUND  
Rev. 8/10/01  
LP2950/51 100mA Low Dropout Voltage Regulators  
©Copyright 2001 Sipex Corporation  
1
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