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TLVH431B-Q1
  • TLVH431B-Q1
  • TLVH431B-Q1

TLVH431B-Q1

ACTIVE

Automotive, low-voltage adjustable precision shunt regulator (reverse pinout)

Texas Instruments TLVH431B-Q1 Product Info

1 April 2026 5

Parameters

Rating

Automotive

VO (V)

1.24

Initial accuracy (max) (%)

0.5

Iz for regulation (min) (µA)

60

VO adj (min) (V)

1.24

VO adj (max) (V)

18

Reference voltage (V)

adjustable

Temp coeff (max) (ppm/°C)

161

Operating temperature range (°C)

-40 to 125

Iout/Iz (max) (mA)

80

Package

SOT-23 (DBV)-5-8.12 mm² 2.9 x 2.8

Features

  • Qualified for Automotive Applications
  • Low-Voltage Operation: Down to 1.24 V
  • Reference Voltage Tolerances at 25°C
    • 0.5% for B Grade
    • 1% for A Grade
  • Adjustable Output Voltage, VO = VREF to 18 V
  • Wide Operating Cathode Current Range: 100 µA to 70 mA
  • 0.25- Typical Output Impedance
  • –40°C to 125°C Specifications

  • Qualified for Automotive Applications
  • Low-Voltage Operation: Down to 1.24 V
  • Reference Voltage Tolerances at 25°C
    • 0.5% for B Grade
    • 1% for A Grade
  • Adjustable Output Voltage, VO = VREF to 18 V
  • Wide Operating Cathode Current Range: 100 µA to 70 mA
  • 0.25- Typical Output Impedance
  • –40°C to 125°C Specifications

Description

The TLVH431 devices are low-voltage 3-terminal adjustable voltage references, with thermal stability specified over the automotive temperature range. Output voltage can be set to any value between VREF (1.24 V) and 18 V with two external resistors (see Figure 2). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431 devices are ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 . Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 an excellent replacement for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

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