Home Power management Voltage references Shunt voltage references

TLVH432A

ACTIVE

1% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)

Product details

VO (V) 1.24 Initial accuracy (max) (%) 1 VO adj (min) (V) 1.24 VO adj (max) (V) 18 Iz for regulation (min) (µA) 60 Reference voltage (V) adjustable Rating Catalog Temp coeff (max) (ppm/°C) 138 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 80
VO (V) 1.24 Initial accuracy (max) (%) 1 VO adj (min) (V) 1.24 VO adj (max) (V) 18 Iz for regulation (min) (µA) 60 Reference voltage (V) adjustable Rating Catalog 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 x 2.37 SOT-89 (PK) 3 18.4275 mm² 4.5 x 4.095
  • Low-voltage operation: down to 1.24 V
  • 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 18 V
  • Wide operating cathode current range: 100 µA to 70 mA
  • 0.25-Ω 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 1.24 V
  • 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 18 V
  • Wide operating cathode current range: 100 µA to 70 mA
  • 0.25-Ω 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 (1.24 V) and 18 V with two external resistors (see Figure 7-2). 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 and TLVH432 devices are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. 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 (1.24 V) and 18 V with two external resistors (see Figure 7-2). 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 and TLVH432 devices are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. 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.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet TLVH431, TLVH432 Low-Voltage Adjustable Precision Shunt Regulators datasheet (Rev. M) PDF | HTML 26 Jan 2023
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

PMP40580 — 180-W universal input PFC + LLC TV power supply reference design

This AC to DC power supply design for TV application provides 12-V, 5-A and 150-V, 0.8-A output from universal AC voltage (90 Vac to 264 Vac). The design uses CRM/DCM PFC controller UCC28056, and LLC controller UCC256404 with enhanced burst mode which enabled for low standby power and smaller (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBZ) 3 View options
SOT-89 (PK) 3 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos