LM431SAI Series

Adjustable/2.5 V, 0.5% Tolerance Shunt Regulator

Catalog

Adjustable/2.5 V, 0.5% Tolerance Shunt Regulator

Part	Voltage - Output (Max) [Max]	Current - Cathode [custom]	Voltage - Output (Min/Fixed) [Min]	Package / Case	Mounting Type	Tolerance	Operating Temperature [Max]	Operating Temperature [Min]	Temperature Coefficient	Current - Output	Reference Type	Output Type	Supplier Device Package	Voltage - Output (Min/Fixed)	Package / Case [y]	Package / Case [x]
ON Semiconductor LM431BCZXA	36 V	1 mA	2.495 V	TO-226-3 TO-92-3	Through Hole	1 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	TO-92-3
ON Semiconductor LM431ACZX	36 V	1 mA		TO-226-3 TO-92-3	Through Hole	2 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	TO-92-3	2.5 V
ON Semiconductor LM431CIM	36 V	1 mA	2.495 V	8-SOIC	Surface Mount		85 °C	-40 °C	50 ppm/°C	100 mA	Shunt	Adjustable	8-SOIC		3.9 mm	0.154 in
ON Semiconductor LM431CIMX	36 V	1 mA	2.495 V	8-SOIC	Surface Mount		85 °C	-40 °C	50 ppm/°C	100 mA	Shunt	Adjustable	8-SOIC		3.9 mm	0.154 in
ON Semiconductor LM431ACM	36 V	1 mA		8-SOIC	Surface Mount	2 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	8-SOIC	2.5 V	3.9 mm	0.154 in
ON Semiconductor LM431SAIMFX	36 V	1 mA		SOT-23-3 Flat Leads	Surface Mount	2 %	85 °C	-40 °C	50 ppm/°C	100 mA	Shunt	Adjustable	SOT-23F-3	2.5 V
ON Semiconductor LM431SBCMLX	36 V	1 mA	2.495 V	TO-243AA	Surface Mount	1 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	SOT-89-3
ON Semiconductor LM431SACMLX	36 V	1 mA		TO-243AA	Surface Mount	2 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	SOT-89-3	2.5 V
ON Semiconductor LM431BCMX	36 V	1 mA	2.495 V	8-SOIC	Surface Mount	1 %	85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	8-SOIC		3.9 mm	0.154 in
ON Semiconductor LM431CCZX	36 V	1 mA	2.495 V	TO-226-3 TO-92-3	Through Hole		85 C	-25 °C	50 ppm/°C	100 mA	Shunt	Adjustable	TO-92-3

Catalog

Adjustable/2.5 V, 0.5% Tolerance Shunt Regulator

Key Features

• Programmable output voltage to 36 V

• Low dynamic output impedance 0.2 Ω (Typical)

• Sink current capability of 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

Description

The LM431A / LM431B / LM431C are three terminal output adjustable regulators with thermal stability over the full operating temperature range. The output voltage can be set to any value between VREF(approximately 2.5 V) and 36 V 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 replacements for Zener diodes in many applications.