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Shunt voltage references

TL432LI-Q1

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Automotive, adjustable, precision shunt regulator with optimized reference current

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Data sheet

TL432LI-Q1

ACTIVE
Data sheet Order now

Product details

VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 1.5 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Iz for regulation (min) (µA) 400 Reference voltage (V) adjustable Rating Automotive Temp coeff (max) (ppm/°C) 63 Operating temperature range (°C) -40 to 150 Iout/Iz (max) (mA) 15
VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 1.5 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Iz for regulation (min) (µA) 400 Reference voltage (V) adjustable Rating Automotive Temp coeff (max) (ppm/°C) 63 Operating temperature range (°C) -40 to 150 Iout/Iz (max) (mA) 15
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
    • Device temperature grade 0: –40°C to +150°C ambient operating temperature
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
  • Minimum typical output voltage: 2.495 V
  • Adjustable output voltage: Vref to 36 V
  • 27 mV maximum temperature drift for grade 1
  • 34 mV maximum temperature drift for grade 0
  • 0.3-Ω typical output impedance
  • Sink-current capability
    • Imin = 0.6 mA (max)
    • IKA = 15 mA (max)
  • Reference input current IREF: 0.4 µA (max)
  • Deviation of reference input current over temperature, II(dev): 0.3 µA (max)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device temperature grade 0: –40°C to +150°C ambient operating temperature
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
  • Minimum typical output voltage: 2.495 V
  • Adjustable output voltage: Vref to 36 V
  • 27 mV maximum temperature drift for grade 1
  • 34 mV maximum temperature drift for grade 0
  • 0.3-Ω typical output impedance
  • Sink-current capability
    • Imin = 0.6 mA (max)
    • IKA = 15 mA (max)
  • Reference input current IREF: 0.4 µA (max)
  • Deviation of reference input current over temperature, II(dev): 0.3 µA (max)

The TL431LI-Q1 is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors. The device has a typical output impedance of 0.3 Ω. Its active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the industry standard TL431-Q1 with optimized Iref and IIdev performance. The lower Iref and IIdev values of the TL431LI-Q1 enable designers to achieve higher system accuracy and lower leakage current. The TL432LI-Q1 has exactly the same functionality and electrical specifications as the TL431LI-Q1, but has a different pinout for the DBZ package.

The TL431LI-Q1 is offered in two grades, with initial tolerances (at 25°C) of 0.5% and 1%, for the B and A grade, respectively. The TL431LI-Q1 is also available in two temperature grades: grade 1 (denoted by a ’Q’ in the part number), and grade 0 (denoted by a ’E’ in the part number), which represent maximum ambient operating temperatures of 125°C and 150°C respectively. The TL43xLI-Q1 is characterized for operation from –40°C to 125°C for grade 1, and –40°C to 150°C for grade 0, and its low output drift versus temperature ensures good stability over the entire temperature range.

The TL431LI-Q1 is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors. The device has a typical output impedance of 0.3 Ω. Its active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the industry standard TL431-Q1 with optimized Iref and IIdev performance. The lower Iref and IIdev values of the TL431LI-Q1 enable designers to achieve higher system accuracy and lower leakage current. The TL432LI-Q1 has exactly the same functionality and electrical specifications as the TL431LI-Q1, but has a different pinout for the DBZ package.

The TL431LI-Q1 is offered in two grades, with initial tolerances (at 25°C) of 0.5% and 1%, for the B and A grade, respectively. The TL431LI-Q1 is also available in two temperature grades: grade 1 (denoted by a ’Q’ in the part number), and grade 0 (denoted by a ’E’ in the part number), which represent maximum ambient operating temperatures of 125°C and 150°C respectively. The TL43xLI-Q1 is characterized for operation from –40°C to 125°C for grade 1, and –40°C to 150°C for grade 0, and its low output drift versus temperature ensures good stability over the entire temperature range.
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Type Title Date
* Data sheet TL431LI-Q1 / TL432LI-Q1 Programmable Shunt Regulator With Optimized Reference Current datasheet (Rev. A) PDF | HTML 14 Nov 2019
Functional safety information TL43xLI-Q1 Functional Safety FIT Rate and Failure Mode Distribution 18 Dec 2019
Application note Designing With the Improved TL431LI (Rev. A) 28 Jun 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Application note Implementing Voltage References and Supervisors Into Your Traction Inverter Desi 22 May 2019

Design & development

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TL431LI and ATL431LI PSpice Average Model

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TL431LI and ATL431LI Unencrypted PSpice Average Model

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

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Supported products & hardware

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Products
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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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