LM431SAI Datasheet, PDF (1/9 Pages) Fairchild Semiconductor – Programmable Shunt Regulator

LM431SAI
Programmable Shunt Regulator
www.fairchildsemi.com
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.20 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 LM431SAI is three terminal output adjustable regulator
with thermal stability over operating temperature range from
-40°C to +85°C. The output voltage can be set any value
between VREF (approximately 2.5 volts) and 36 volts with
two external resistors. This device has a typical dynamic out-
put impedance of 0.2Ω Active output circuit provides a
sharp turn-on characteristic, making this device excellent
replacement for Zener Diodes in many applications.
SOT-23F
3
12
1. Cathode 2. Ref 3. Anode
Internal Block Diagram
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©2009 Fairchild Semiconductor Corporation
Rev. 1.0.0