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Product details

Parameters

VO (V) 1.24 Reference voltage Adjustable Initial accuracy (Max) (%) 0.5 Rating HiRel Enhanced Product VO adj (Min) (V) 1.24 VO adj (Max) (V) 18 Iz for regulation (Min) (uA) 60 Temp coeff (Max) (ppm/ degree C) 138 Operating temperature range (C) -55 to 125 Iout/Iz (Max) (mA) 80 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Shunt voltage references

Features

  • Low-voltage operation: down to 1.24 V
  • Reference voltage tolerances 0.5% at 25°C
  • Adjustable output voltage, VO = VREF to 18 V
  • Wide operating cathode current range:
    200 µA to 70 mA
  • 0.25-Ω typical output impedance
  • Supports defense and aerospace applications:
    • Controlled baseline
    • Available in extended (–55°C to 125°C) temperature range
    • Extended product life cycle
    • Extended product-change notification
    • Product traceability

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Description

The TLVH431B-EP device is a low-voltage, 3-terminal, adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 18 V with two external resistors (see Figure 24). This device operates from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431B-EP device is ideal for voltage references in isolated feedback circuits designed for 3-V to 3.3-V switching-mode power supplies. It has a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431B-EP device an excellent replacement for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

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Technical documentation

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Type Title Date
* Datasheet TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating Current Adjustable Precision Shunt Regulator datasheet Dec. 06, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
White papers Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018
White papers Tips and tricks for designing with voltage references May 30, 2017

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