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TLV431B-Q1

ACTIVE

Automotive, low-voltage adjustable precision shunt regulator

Product details

VO (V) 1.24 Initial accuracy (max) (%) 0.5 VO adj (min) (V) 1.24 VO adj (max) (V) 6 Iz for regulation (min) (µA) 55 Reference voltage (V) adjustable Rating Automotive Temp coeff (max) (ppm/°C) 161 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
VO (V) 1.24 Initial accuracy (max) (%) 0.5 VO adj (min) (V) 1.24 VO adj (max) (V) 6 Iz for regulation (min) (µA) 55 Reference voltage (V) adjustable Rating Automotive Temp coeff (max) (ppm/°C) 161 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: -40°C to 125°C ambient operating temperature range
  • Low-voltage operation, VREF = 1.24V
  • Adjustable output voltage, VO = VREF to 6V
  • Reference voltage tolerances at 25°C
    • 0.5% for TLV431B
    • 1% for TLV431A
  • Typical temperature drift
    • 11mV (–40°C to 125°C)
  • Low operational cathode current, 80µA typical
  • 0.25Ω Typical output impedance
  • See TLVH431 and TLVH432 for:
    • Wider VKA (1.24V to 18V) and IK (80mA)
    • Multiple pinouts for SOT-23-3 and SOT-89 packages
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: -40°C to 125°C ambient operating temperature range
  • Low-voltage operation, VREF = 1.24V
  • Adjustable output voltage, VO = VREF to 6V
  • Reference voltage tolerances at 25°C
    • 0.5% for TLV431B
    • 1% for TLV431A
  • Typical temperature drift
    • 11mV (–40°C to 125°C)
  • Low operational cathode current, 80µA typical
  • 0.25Ω Typical output impedance
  • See TLVH431 and TLVH432 for:
    • Wider VKA (1.24V to 18V) and IK (80mA)
    • Multiple pinouts for SOT-23-3 and SOT-89 packages

The TLV431 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 1.24V on stand alone mode or any value between VREF (1.24V) and 6V 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 TLV431 device is a voltage reference in isolated feedback circuits designed for 3V to 3.3V switching-mode power supplies. These devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

The TLV431 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 1.24V on stand alone mode or any value between VREF (1.24V) and 6V 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 TLV431 device is a voltage reference in isolated feedback circuits designed for 3V to 3.3V switching-mode power supplies. These devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

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Type Title Date
* Data sheet TLV431x-Q1 Low-Voltage Adjustable Precision Shunt Regulator datasheet (Rev. B) PDF | HTML 19 Jul 2024
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Application brief Automotive LED Lighting with Adjustable Shunt References 17 Jul 2018

Design & development

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

Simulation model

TLV431 Family TINA-TI AC Reference Design

SLVM090.TSC (80 KB) - TINA-TI Reference Design
Simulation model

TLV431 Family TINA-TI Transient Reference Design

SLVM089.TSC (45 KB) - TINA-TI Reference Design
Simulation model

TLV431 Family TINA-TI Transient and AC Spice Model

SLVM088.ZIP (3 KB) - TINA-TI Spice Model
Simulation model

TLV431 Family Unencrypted PSpice Transient and AC Model (Rev. A)

SLIM005A.ZIP (161 KB) - PSpice Model
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
ATL431 2.5-V low-IQ adjustable precision shunt regulator ATL431LI Low-IQ programmable shunt regulator offered in an ultra-small DQN package ATL431LI-Q1 Automotive, high-bandwidth, low-IQ programmable shunt regulator (pinout: KRA) ATL432 2.5-V precision programmable shunt regulator ATL432LI High-bandwidth, low-IQ programmable shunt regulator (pinout: RKA) ATL432LI-Q1 Automotive, high-bandwidth, low-IQ programmable shunt regulator (pinout: RKA) LM4030 Ultra-high-precision shunt voltage reference LM4040 Fixed voltage, 45-µA, precision micropower shunt voltage reference LM4040-N 100-ppm/°C precision micropower shunt voltage reference LM4040-N-Q1 Automotive, 100-ppm/°C precision micropower shunt voltage reference LM4040C25-EP Enhanced Product 2.5-V Precision Micropower Shunt Voltage Reference, 0.5% accuracy LM4041-N Fixed & adjustable, 45-µA, precision micropower shunt voltage reference LM4041-N-Q1 Automotive, precision micropower shunt voltage reference LM4041A12 1.2-V precision micropower shunt voltage reference with 0.1% accuracy LM4041B Adjustable, precision micropower shunt voltage reference with 0.2% accuracy LM4041B12 1.2-V precision micropower shunt voltage reference with 0.2% accuracy LM4041C Adjustable, precision micropower shunt voltage reference with 0.5% accuracy LM4041C12 1.2-V precision micropower shunt voltage reference with 0.5% accuracy LM4041D Adjustable, precision micropower shunt voltage reference with 1% accuracy LM4041D12 1.2-V precision micropower shunt voltage reference with 1% accuracy LM4050-N 50-ppm/°C precision micropower shunt voltage reference LM4050-N-Q1 Automotive, 50-ppm/°C precision micropower shunt voltage reference LM4050QML-SP Radiation-hardened QMLV, 2.5-V or 5-V shunt voltage reference LM4051-N Fixed & adjustable, precision micropower shunt voltage reference LMV431 1.5%, low-voltage (1.24-V) adjustable precision shunt regulator LMV431A 1%, low-voltage (1.24-V) adjustable precision shunt regulator LMV431B 0.5%, low-voltage (1.24-V) adjustable precision shunt regulator TL431 Adjustable precision shunt regulator TL431-Q1 Automotive adjustable precision shunt regulator (pin layout: KRA) TL431C 2% adjustable precision shunt regulator TL431LI Adjustable precision shunt regulator with optimized reference current (pin layout: KRA) TL431LI-Q1 Automotive, adjustable, precision shunt regulator with optimized reference current TL432 Adjustable precision shunt regulator (reverse pinout) TL432-Q1 Automotive adjustable precision shunt regulator (pin layout: RKA) TL432LI Adjustable precision shunt regulator with optimized reference current (pin layout: RKA) TL432LI-Q1 Automotive, adjustable, precision shunt regulator with optimized reference current TLA431 All-capacitor stable precision programmable reference with KRA pin layout TLV431 1.5% accuracy, low-voltage, adjustable precision shunt regulator TLV431A 1% accuracy, low-voltage, adjustable precision shunt regulator TLV431A-Q1 Automotive, low-voltage adjustable precision shunt regulator TLV431B 0.5% accuracy, low-voltage, adjustable precision shunt regulator TLV431B-Q1 Automotive, low-voltage adjustable precision shunt regulator TLVH431 1.5% low-voltage wide-operating current adjustable precision shunt regulator TLVH431A 1% low-voltage wide-operating current adjustable precision shunt regulator TLVH431A-Q1 Automotive, low-voltage adjustable precision shunt regulator TLVH431B 0.5% low-voltage wide-operating current adjustable precision shunt regulator TLVH431B-EP Enhanced-plastic 0.5% low-voltage wide-operating-current adjustable precision shunt regulator TLVH431B-Q1 Automotive, low-voltage adjustable precision shunt regulator (reverse pinout) TLVH432 1.5% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout) TLVH432A 1% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout) TLVH432B 0.5% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)
General-purpose op amps
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
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 (...)
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Efficiency, protection, and integration are important design factors for compact DC-fed drives up to 60VDC. This reference design shows a three-phase inverter with nominal 48-V DC input and a 10-ARMS output current.  The 100-V intelligent three-phase gate driver DRV8350R with integrated buck (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01527 — Discrete Resolver Front-End Reference Design With C2000™ Microcontroller and ±0.1° Accuracy

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Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
SOT-23 (DBZ) 3 Ultra Librarian

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