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Shunt voltage references

TLVH431

ACTIVE

1.5% low-voltage wide-operating current adjustable precision shunt regulator

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Data sheet

TLVH431

ACTIVE
Data sheet Order now

Product details

Rating Catalog VO (V) 1.24 Initial accuracy (max) (%) 1.5 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) 138 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 80
Rating Catalog VO (V) 1.24 Initial accuracy (max) (%) 1.5 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) 138 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 80
SOT-23 (DBZ) 3 6.9204 mm² (2.92 mm × 2.37 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) TO-92 (LP) 3 19.136 mm² (5.2 mm × 3.68 mm) SOT-89 (PK) 3 18.4275 mm² (4.5 mm × 4.095 mm) SOT-SC70 (DCK) 6 4.2 mm² (2 mm × 2.1 mm)
  • Low-voltage operation: down to 1.24V
  • Reference voltage tolerances at 25°C
    • 0.5% for B grade
    • 1% for A grade
    • 1.5% for standard grade
  • Adjustable output voltage, VO = VREF to 18V
  • Wide operating cathode current range: 100µA to 70mA
  • 0.25Ω typical output impedance
  • –40°C to +125°C specifications
  • TLVH432 provides alternative pinouts for SOT-23-3 and SOT-89 packages
  • Ultra-small SC-70 package offers 40% smaller footprint than SOT-23-3
  • Low-voltage operation: down to 1.24V
  • Reference voltage tolerances at 25°C
    • 0.5% for B grade
    • 1% for A grade
    • 1.5% for standard grade
  • Adjustable output voltage, VO = VREF to 18V
  • Wide operating cathode current range: 100µA to 70mA
  • 0.25Ω typical output impedance
  • –40°C to +125°C specifications
  • TLVH432 provides alternative pinouts for SOT-23-3 and SOT-89 packages
  • Ultra-small SC-70 package offers 40% smaller footprint than SOT-23-3

The TLVH431 and TLVH432 devices are low-voltage 3-terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24V) and 18V with two external resistors (see Figure 6-2). These devices operate from a lower voltage (1.24V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431 and TLVH432 devices are an excellent choice for voltage references in isolated feedback circuits for 3V to 3.3V switching-mode power supplies. The devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 and TLVH432 devices excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

The TLVH432 device is identical to the TLVH431 device, but is offered with different pinouts for the 3-pin SOT-23 and SOT-89 packages.

The TLVH431 and TLVH432 devices are low-voltage 3-terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24V) and 18V with two external resistors (see Figure 6-2). These devices operate from a lower voltage (1.24V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431 and TLVH432 devices are an excellent choice for voltage references in isolated feedback circuits for 3V to 3.3V switching-mode power supplies. The devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 and TLVH432 devices excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

The TLVH432 device is identical to the TLVH431 device, but is offered with different pinouts for the 3-pin SOT-23 and SOT-89 packages.
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Technical documentation

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* Data sheet TLVH431, TLVH432 Low-Voltage Adjustable Precision Shunt Regulators datasheet (Rev. N) PDF | HTML Jun 6, 2024
Technical article Make sure your optocoupler is properly biased PDF | HTML Feb 16, 2024
E-book Tips and tricks for designing with voltage references (Rev. A) May 7, 2021
Application note Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) Dec 11, 2019
Selection guide 431 Device Nomenclature (Rev. B) Sep 18, 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun 28, 2019
Technical article Designing for isolated DC/DC converter shunt safety PDF | HTML Aug 29, 2015
Application note Designing Overcurrent protection for TPL7407L Peripheral Driver Nov 5, 2014
Application note Setting the shunt voltage on an adjustable shunt regulator Sep 1, 2011
More literature SLL Precision Reference Product Clip Feb 23, 2006

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Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBZ) 3 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
TO-92 (LP) 3 Ultra Librarian
SOT-89 (PK) 3 Ultra Librarian
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