Data Sheet

LM431A / LM431B / LM431C — Programmable Shunt Regulator
© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
LM431A / LM431B / LM431C Rev. 1.2.0 1
June 2013
LM431A / LM431B / LM431C
Programmable Shunt Regulator
Features
• Programmable Output Voltage to 36 V
• Low Dynamic Output Impedance: 0.2 Ω (Typical)
• Sink Current Capability: 1.0 to 100 mA
• Equivalent Full-Range Temperature Coefficient of
50 ppm/°C (Typical)
• Temperature Compensated for Operation Over Full
Rated Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn-on Response
Ordering Information
Part Number
Operating
Temperature
Range
Output Voltage
Tolerance
Top Mark Package Packing Method
LM431CCZ
-25 ~ +85
°
C
0.5%
LM431CCZ TO-92 Bulk
LM431CCMX LM431CCM 8-SOIC Tape and Reel
LM431BCZX
1%
LM431BCZ TO-92 Tape and Reel
LM431BCZXA LM431BCZ TO-92 Ammo
LM431BCMX LM431BCM 8-SOIC Tape and Reel
LM431ACZ
2%
LM431ACZ TO-92 Bulk
LM431ACZX LM431ACZ TO-92 Tape and Reel
LM431ACMX LM431ACM 8-SOIC Tape and Reel
LM431CIMX
-40 ~ +85
°
C
0.5% LM431CIM 8-SOIC Tape and Reel
LM431BIZX 1% LM431BIZ TO-92 Tape and Reel
LM431AIZ
2%
LM431AIZ TO-92 Bulk
LM431AIMX LM431AIM 8-SOIC Tape and Reel
Description
The LM431A / LM431B / LM431C are three-terminal out-
put adjustable regulators with thermal stability over the
full operating temperature range. The output voltage can
be set to any value between V
REF
(approximately 2.5 V)
and 36 V with two external resistors. These devices have
a typical dynamic output impedance of 0.2 Ω. Active out-
put circuit provides a sharp turn-on characteristic, mak-
ing these devices excellent replacements for Zener
diodes in many applications.
TO-92
8-SOIC
1. Ref 2. Anode 3. Cathode
1
1
1.Cathode 2.3.6.7.Anode
4.5.NC 8.Ref