www.fairchildsemi.com
LM431A/LM431B/LM431C
Programmable Shunt Regulator
Features
• • • • Programmable Output Voltage to...
www.fairchildsemi.com
LM431A/LM431B/LM431C
Programmable Shunt Regulator
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 LM431A/LM431B/LM431C 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 0.2Ω Active output circuit provides a sharp turn-on characteristic, making these devices excellent replacement for Zener Diodes in many applications.
TO-92
1
1. Ref 2. Anode 3. Cathode 8-DIP 8-SOP
1
1
1.Cathode 2.3.4.5.7.NC 6.Anode 8.Ref
1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref
Internal Block Diagram
REFERENCE
CATHODE
2.5 Vref
ANODE CATHODE (K)
REFERENCE (R)
ANODE (A)
Rev. 1.0.6
©2002 Fairchild Semiconductor Corporation
LM431A/LM431B/LM431C
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.) Parameter Cathode
Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation M, Z Suffix Package N Suffix Package Operating Temperature Range LM431xC LM431xI Junction Temperature Storage...