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Shunt voltage references

TL1431

ACTIVE

Precision adjustable (programmable) shunt reference

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Data sheet

TL1431

ACTIVE
Data sheet Order now

Product details

VO (V) 2.5 Reference voltage Adjustable Initial accuracy (Max) (%) 0.4 VO adj (Min) (V) 2.5 VO adj (Max) (V) 36 Iz for regulation (Min) (uA) 450 Rating Automotive, Catalog Temp coeff (Max) (ppm/ degree C) 114 Operating temperature range (C) -40 to 125, 0 to 70 Iout/Iz (Max) (mA) 150
VO (V) 2.5 Reference voltage Adjustable Initial accuracy (Max) (%) 0.4 VO adj (Min) (V) 2.5 VO adj (Max) (V) 36 Iz for regulation (Min) (uA) 450 Rating Automotive, Catalog Temp coeff (Max) (ppm/ degree C) 114 Operating temperature range (C) -40 to 125, 0 to 70 Iout/Iz (Max) (mA) 150
SOIC (D) 8 19 mm² 4.9 x 3.9 SOIC (D) 8 19 mm² 3.91 x 4.9 TO-92 (LP) 3 19 mm² 5.2 x 3.68 TSSOP (PW) 8 19 mm² 3 x 6.4
  • 0.4% Initial Voltage Tolerance
  • 0.2-Ω Typical Output Impedance
  • Fast Turnon (500 ns)
  • Sink Current Capability (1 mA to 100 mA)
  • Low Reference Current (REF)
  • Adjustable Output Voltage (VI(ref) to 36 V)
  • 0.4% Initial Voltage Tolerance
  • 0.2-Ω Typical Output Impedance
  • Fast Turnon (500 ns)
  • Sink Current Capability (1 mA to 100 mA)
  • Low Reference Current (REF)
  • Adjustable Output Voltage (VI(ref) to 36 V)

The TL1431 device is a precision programmable reference with specified thermal stability over automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V) and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.

The TL1431 device is a precision programmable reference with specified thermal stability over automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V) and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.
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Type Title Date
* Data sheet TL1431 Precision Programmable Reference datasheet (Rev. N) PDF | HTML 04 Oct 2016
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Application note Setting the shunt voltage on an adjustable shunt regulator 01 Sep 2011

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