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LM431SA Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # LM431SA
Description  Programmable Shunt Regulator
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

LM431SA Datasheet(HTML) 1 Page - Fairchild Semiconductor

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© 2012 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM431SA/LM431SB/LM431SC Rev. 1.2.0
1
June 2012
LM431SA/LM431SB/LM431SC
Programmable Shunt Regulator
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2
Ω Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
50ppm/
°C Typical
• Temperature Compensated for Operation Over Full
Rated Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn-on Response
Internal Block Diagram
1. Ref 2. Anode 3. Cathode
1
SOT-89
SOT-23F
1
2
3
1. Cathode 2. Ref 3. Anode
SOT-23
1
2
3
M32 - 1. Ref 2. Cathode 3. Anode
M3 - 1. Cathode 2. Ref 3. Anode
+
-
Description
The LM431SA/LM431SB/LM431SC are three terminal
output adjustable regulators with thermal stability over
operating temperature range. The output voltage can be
set any value between VREF (approximately 2.5 volts)
and 36 volts with two external resistors. These devices
have a typical dynamic output impedance of 0.2
Ω. Active
output circuit provides a sharp turn-on characteristic,
making these devices excellent replacement for Zener
Diodes in many applications.


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