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LMV431CM5X

更新时间： 2024-02-23 00:19:10
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德州仪器 - TI 稳压器
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27页 1478K
描述
Low-Voltage (1.24V) Adjustable Precision Shunt Regulators

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LMV431CM5X 数据手册

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LMV431, LMV431A, LMV431B  
www.ti.com  
SNVS041F –MAY 2004–REVISED MAY 2005  
LMV431/LMV431A/LMV431B Low-Voltage (1.24V) Adjustable Precision Shunt Regulators  
Check for Samples: LMV431, LMV431A, LMV431B  
1
FEATURES  
DESCRIPTION  
The LMV431, LMV431A and LMV431B are precision  
1.24V shunt regulators capable of adjustment to 30V.  
Negative feedback from the cathode to the adjust pin  
controls the cathode voltage, much like a non-  
inverting op amp configuration (Refer to Symbol and  
Functional diagrams). A two resistor voltage divider  
terminated at the adjust pin controls the gain of a  
1.24V band-gap reference. Shorting the cathode to  
the adjust pin (voltage follower) provides a cathode  
voltage of a 1.24V.  
2
•
Low Voltage Operation/Wide Adjust Range  
(1.24V/30V)  
•
•
0.5% Initial Tolerance (LMV431B)  
Temperature Compensated for Industrial  
Temperature Range (39 PPM/°C for the  
LMV431AI)  
•
•
•
•
Low Operation Current (55µA)  
Low Output Impedance (0.25Ω)  
Fast Turn-On Response  
Low Cost  
The LMV431, LMV431A and LMV431B have  
respective initial tolerances of 1.5%, 1% and 0.5%,  
and functionally lends themselves to several  
applications that require zener diode type  
performance at low voltages. Applications include a  
3V to 2.7V low drop-out regulator, an error amplifier  
in a 3V off-line switching regulator and even as a  
voltage detector. These parts are typically stable with  
capacitive loads greater than 10nF and less than  
50pF.  
APPLICATIONS  
•
•
•
•
•
•
•
Shunt Regulator  
Series Regulator  
Current Source or Sink  
Voltage Monitor  
Error Amplifier  
The LMV431, LMV431A and LMV431B provide  
performance at a competitive price.  
3V Off-Line Switching Regulator  
Low Dropout N-Channel Series Regulator  
Connection Diagram  
*Pin 1 is not internally connected.  
*Pin 2 is internally connected to Anode pin. Pin 2 should be either  
floating or connected to Anode pin.  
Figure 1. TO-92: Plastic Package  
Top View  
Figure 2. SOT-23-5  
Top View  
ANODE  
REF  
CATHODE  
Figure 3. SOT-23-3  
Top View  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004–2005, Texas Instruments Incorporated  
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LMV431CM5X 替代型号

型号 品牌 替代类型 描述 数据表
LMV431CM5 TI

完全替代

 Low-Voltage (1.24V) Adjustable Precision Shunt Regulators
LMV431CM5X/NOPB TI

完全替代

 Low-Voltage (1.24V) Adjustable Precision Shunt Regulators

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