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Details for Texas Instruments


2.5V low-Iq adjustable precision shunt regulator
Buy Directly from Texas Instruments (27162 in Stock)
$0.1600 per unit
Series Information for ATL431AIDBZR - Texas Instruments


  • feature
    Adjustable Regulated Output of 2.5 V to 36 V
  • feature
    Extended Cathode Current Range 35 u00b5A to 100 mA
  • feature
    Internally Compensated for Stability u2013 Stable With No Capacitive Load
  • feature
    Low Output Impedance of 0.3 u03a9 (Max)
  • feature
    Reference Voltage Tolerances at 25u00b0C u2013 0.5% for B Grade u2013 1% for A Grade
  • feature
    Typical Temperature Drift u2013 5 mV (u201340u00b0C to +85u00b0C); I Version u2013 6 mV (u201340u00b0C to +125u00b0C); Q Version
  • feature
    Very-Low Operating Current u2013 IKA(min) = 35 u00b5A (Max) u2013 IREF = 150 nA (Max)


The ATL431 and ATL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and industrial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.05 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. The ATL43x has > 20x improvement cathode current range over it's TL43x predecessor. It also is stable with a wider range of load capacitance types and values. ATL431 and ATL432 are the exact same parts but with different pinouts and order numbers. The ATL43x is offered in two grades, with initial tolerances (at 25°C) of 0.5%, 1%, for the B and A grade, respectively. In addition, low output drift vs temperature ensures consistent voltage regulation over the entire temperature range. The ATL43xxI devices are characterized for operation from –40°C to +85°C, and the ATL43xxQ devices are characterized for operation from –40°C to +125°C.


Voltage Reference Type:
Shunt - Adjustable
Product Range:
TL431 Series
Reference Voltage:
2.495V to 36V
Initial Accuracy:
Temperature Coefficient:
Voltage Reference Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Automotive Qualification Standard:
RoHS Phthalates Compliant:
MSL 1 - Unlimited
No SVHC (27-Jun-2018)
Reference Volts:

Alternate Descriptions

Avnet America

V-Ref Adjustable/Precision 2.5V to 36V 100mA 3-Pin SOT-23 T/R

Avnet America product

Avnet Europe

V-Ref Adjustable/Precision 2.5V to 36V 100mA 3-Pin SOT-23 T/R

Avnet Europe product

Texas Instruments

2.5V low-Iq adjustable precision shunt regulator

Texas Instruments product