Integrated Circuits (ICs)

LM431ACZ/LFT3

Active

2%, 1%, OR 0.5% ACCURACY, ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

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Search across all available documentation for this part.

DocumentsTO-92 Packing Options / Ordering Instructions (Rev. A)Precision Output Current Limiting Using Average Current Monitor Feature +5

Integrated Circuits (ICs)

LM431ACZ/LFT3

Active

Texas Instruments

2%, 1%, OR 0.5% ACCURACY, ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

Deep-Dive with AI

DocumentsTO-92 Packing Options / Ordering Instructions (Rev. A)Precision Output Current Limiting Using Average Current Monitor Feature +5

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM431ACZ/LFT3

Current - Cathode [custom]	1 mA
Current - Output	100 mA
Mounting Type	Through Hole
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Type	Adjustable
Package / Case	TO-226-3, TO-92-3
Reference Type	Shunt
Supplier Device Package	TO-92-3
Temperature Coefficient	50 ppm/°C
Tolerance	2.2 %
Voltage - Output (Max) [Max]	37 V
Voltage - Output (Min/Fixed) [Min]	2.495 V

LM431 Series

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 %

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	1201	$ 0.25
	Cut Tape (CT)	1	$ 0.78
		10	$ 0.69
		25	$ 0.64
		100	$ 0.53
		250	$ 0.49
		500	$ 0.42
		1000	$ 0.33
	Tape & Box (TB)	2000	$ 0.22
Texas Instruments	LARGE T&R	1	$ 0.43
		100	$ 0.33
		250	$ 0.24
		1000	$ 0.17

Description

General part information

LM431 Series

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.

Documents

Technical documentation and resources

LM431ACZ/LFT3

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LM431ACZ/LFT3

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Technical Specifications

LM431 Series

Pricing

Description

LM431 Series

Documents

TO-92 Packing Options / Ordering Instructions (Rev. A)

Precision Output Current Limiting Using Average Current Monitor Feature

431 Device Nomenclature (Rev. B)

Low-cost flyback solutions for 10-mW standby power

LM431 Adjustable Precision Zener Shunt Regulator datasheet (Rev. H)

AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A)

A Simple Constant Voltage Regulation Using the MODE Pin (Rev. A)

LM431 Series