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ATL431LI-Q1

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Automotive, high-bandwidth, low-IQ programmable shunt regulator (pinout: KRA)

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Data sheet

ATL431LI-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 80 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 66 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
Rating Automotive VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 80 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 66 Operating temperature range (°C) -40 to 125 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
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
  • Minimum typical output voltage: 2.5 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C
  • 27 mV maximum temperature drift
  • 0.3-Ω typical output impedance
  • Sink-current capability
    • Imin = 0.08 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
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
  • Minimum typical output voltage: 2.5 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C
  • 27 mV maximum temperature drift
  • 0.3-Ω typical output impedance
  • Sink-current capability
    • Imin = 0.08 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 ATL43xLI-Q1 is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. Its output voltage can be set to any value between Vref (approximately 2.5 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 TL431LI-Q1 and TL432LI-Q1, with lower minimum operating current to help reduce system power consumption. The ATL432LI-Q1 has exactly the same functionality and electrical specifications as the ATL431LI-Q1, but has a different pinout for the DBZ package.

The ATL431LI-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 ATL43xLI-Q1 is characterized for operation from –40°C to +125°C, and its low output drift versus temperature ensures good stability over the entire temperature range.

The ATL43xLI-Q1 is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. Its output voltage can be set to any value between Vref (approximately 2.5 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 TL431LI-Q1 and TL432LI-Q1, with lower minimum operating current to help reduce system power consumption. The ATL432LI-Q1 has exactly the same functionality and electrical specifications as the ATL431LI-Q1, but has a different pinout for the DBZ package.

The ATL431LI-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 ATL43xLI-Q1 is characterized for operation from –40°C to +125°C, and its low output drift versus temperature ensures good stability over the entire temperature range.
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Type Title Date
* Data sheet ATL431LI-Q1 / ATL432LI-Q1 High Bandwidth Low-IQ Programmable Shunt Regulator datasheet (Rev. A) PDF | HTML 14 Nov 2019
Analog Design Journal High-power, low-cost, discrete linear pre-regulator for automotive rear lights 21 Dec 2020
Functional safety information ATL43xLI-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 17 Sep 2020
Application note Extending the Input Voltage Range of the LM5180‐Q1 PSR Flyback for VDA320(LV148) 30 Jan 2020
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
Application note Designing with the ATL431LI 27 Nov 2018

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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
  • 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
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  • 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
  • LM4060 — 20ppm/°C maximum drift high-precision 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
  • TLA432 — All-capacitor stable precision programmable reference with RKA 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
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  • 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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