LM431 Series

2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator

Catalog

2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator

Part	Current - Output	Voltage - Output (Max) [Max]	Output Type	Voltage - Output (Min/Fixed) [Min]	Reference Type	Supplier Device Package	Package / Case	Mounting Type	Temperature Coefficient	Current - Cathode [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Tolerance	Voltage - Output (Min/Fixed)	Package / Case [y]	Package / Case [x]	Tolerance [Min]	Tolerance [Max]
Texas Instruments LM431BCM3/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	SOT-23-3	SC-59 SOT-23-3 TO-236-3	Surface Mount	50 ppm/°C	1 mA	70 °C	0 °C	1 %
Texas Instruments LM431CCM/NOPB	100 mA	37 V	Adjustable		Shunt	8-SOIC	8-SOIC	Surface Mount	50 ppm/°C	1 mA	70 °C	0 °C		2.5 V	3.9 mm	0.154 in	-1 %	0.4 %
Texas Instruments LM431ACZ/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	TO-92-3	TO-226-3 TO-92-3	Through Hole	50 ppm/°C	1 mA	70 °C	0 °C	2.2 %
Texas Instruments LM431ACM3/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	SOT-23-3	SC-59 SOT-23-3 TO-236-3	Surface Mount	50 ppm/°C	1 mA	70 °C	0 °C	2.2 %
Texas Instruments LM431BIMX/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	8-SOIC	8-SOIC	Surface Mount	50 ppm/°C	1 mA	85 °C	-40 °C	1 %		3.9 mm	0.154 in
Texas Instruments LM431CIZ/LFT1	100 mA	37 V	Adjustable		Shunt	TO-92-3	TO-226-3 TO-92-3	Through Hole	50 ppm/°C	1 mA	85 °C	-40 °C		2.5 V			-1 %	0.4 %
Texas Instruments LM431ACZ/LFT3	100 mA	37 V	Adjustable	2.495 V	Shunt	TO-92-3	TO-226-3 TO-92-3	Through Hole	50 ppm/°C	1 mA	70 °C	0 °C	2.2 %
Texas Instruments LM431BIZ/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	TO-92-3	TO-226-3 TO-92-3	Through Hole	50 ppm/°C	1 mA	85 °C	-40 °C	1 %
Texas Instruments LM431AIM3	100 mA	37 V	Adjustable	2.495 V	Shunt	SOT-23-3	SC-59 SOT-23-3 TO-236-3	Surface Mount	50 ppm/°C	1 mA	85 °C	-40 °C	2.2 %
Texas Instruments LM431AIZ/NOPB	100 mA	37 V	Adjustable	2.495 V	Shunt	TO-92-3	TO-226-3 TO-92-3	Through Hole	50 ppm/°C	1 mA	85 °C	-40 °C	2.2 %

Catalog

2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator

Key Features

• Average Temperature Coefficient 50 ppm/°CTemperature Compensated for Operation Overthe Full Temperature RangeProgrammable Output VoltageFast Turnon ResponseLow-Output NoiseLow-Dynamic Output ImpedanceAvailable in Space-Saving SOIC-8, SOT-23, andTO-92 PackagesAverage Temperature Coefficient 50 ppm/°CTemperature Compensated for Operation Overthe Full Temperature RangeProgrammable Output VoltageFast Turnon ResponseLow-Output NoiseLow-Dynamic Output ImpedanceAvailable in Space-Saving SOIC-8, SOT-23, andTO-92 Packages

Description

The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications. The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages. The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications. The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages.