LM431SA_12 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – Programmable Shunt Regulator

LM431SA/LM431SB/LM431SC
Programmable Shunt Regulator
June 2012
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2Ω 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
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 V_REF (approximately 2.5 volts)
and 36 volts with two external resistors. These devices
have a typical dynamic output impedance of 0.2Ω. Active
output circuit provides a sharp turn-on characteristic,
making these devices excellent replacement for Zener
Diodes in many applications.
SOT-89
SOT-23F
3
1
12
1. Ref 2. Anode 3. Cathode 1. Cathode 2. Ref 3. Anode
SOT-23
3
12
M32 - 1. Ref 2. Cathode 3. Anode
M3 - 1. Cathode 2. Ref 3. Anode
Internal Block Diagram
+
-
© 2012 Fairchild Semiconductor Corporation
LM431SA/LM431SB/LM431SC Rev. 1.2.0
1
www.fairchildsemi.com