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Shunt voltage references

TLVH431B-EP

ACTIVE

Enhanced-plastic 0.5% low-voltage wide-operating-current adjustable precision shunt regulator

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Data sheet

TLVH431B-EP

ACTIVE
Data sheet Order now

Product details

VO (V) 1.24 Initial accuracy (max) (%) 0.5 VO adj (min) (V) 1.24 VO adj (max) (V) 18 Iz for regulation (min) (µA) 60 Reference voltage (V) adjustable Rating HiRel Enhanced Product Temp coeff (max) (ppm/°C) 138 Operating temperature range (°C) -55 to 125 Iout/Iz (max) (mA) 80
VO (V) 1.24 Initial accuracy (max) (%) 0.5 VO adj (min) (V) 1.24 VO adj (max) (V) 18 Iz for regulation (min) (µA) 60 Reference voltage (V) adjustable Rating HiRel Enhanced Product Temp coeff (max) (ppm/°C) 138 Operating temperature range (°C) -55 to 125 Iout/Iz (max) (mA) 80
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37
  • 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
  • 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

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.

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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* Data sheet TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating Current Adjustable Precision Shunt Regulator datasheet PDF | HTML 06 Dec 2019
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018

Design & development

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Calculation tool

SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator

This tool guides the user through the design process for the TLx431 and LM40x0 family of shunt voltage references. This calculator will recommend resistance and capacitance values to optimally meet the user's desired specifications.
Supported products & hardware

Supported products & hardware

Products
Shunt voltage references
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TLV4313 — Quad, 5.5-V, 1-MHz, low quiescent current (65-μA), RRIO operational amplifier TLV4314 — Quad, 5.5-V, 3-MHz, RRIO operational amplifier TLV4314-Q1 — Automotive-grade, quad, 5.5-V, 3-MHz, RRIO operational amplifier TLV4316 — Quad, 5.5-V, 10-MHz, RRIO operational amplifier TLV4316-Q1 — Automotive-grade, quad, 5.5-V, 10-MHz, RRIO operational amplifier TLV4379 — Quad, 5.5-V, 90-kHz, low quiescent current (4-μA), RRIO operational amplifier
Precision op amps (Vos<1mV)
TLV4333 — Quad, 350-kHz, low-noise, RRIO, CMOS operational amplifier for cost-sensitive systems TLV4376 — Quad 5.5-MHz, 100-µV offset, 8-nV/√Hz noise, 815-µA power, precision operational amplifiers TLV4387 — Quad, ultra-high-precision (10 μV) zero-drift (0.01 μV/°C) low-input-bias-current op amp
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