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Texas Instruments TL432AQDBZRQ1 — Analog & Data Acquisition

TL432AQDBZRQ1 Adjustable Shunt Voltage Reference, AEC-Q100

MPNTL432AQDBZRQ1
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Texas Instruments TL432AQDBZRQ1 adjustable shunt voltage reference, AEC-Q100 automotive qualified, ±1% tolerance, 100 mA output, 2.495 V min, SOT-23-3 package, -40°C to 125°C.

$0.4700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL432AQDBZRQ1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode700 µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-236-3, SC-59, SOT-23-3

Product details

Automotive-grade adjustable shunt reference

This is the automotive-grade sibling of the standard TL432, sharing the same pinout and basic function but with AEC-Q100 stress qualification and extended temperature coverage. It is designed for shunt regulation in power supplies, feedback loops in DC-DC converters, and precision reference generation in automotive ECUs, battery management systems, and infotainment modules.

The 100 mA output current capability allows this shunt to drive the optocoupler LED in a secondary-side feedback loop for supplies up to several hundred watts, or to sink enough current to bias a pass transistor for higher-current regulation. The 700 µA minimum cathode current sets the lower bound for the bias resistor — below that the reference drops out of regulation, so the design must ensure the cathode current stays above 700 µA at all operating points, including light-load conditions. For a 2.5 V reference, ±1% means ±25 mV — tight enough for most automotive feedback loops without a trim pot.

SOT-23-3 footprint and reel packaging

Housed in a standard SOT-23-3 (TO-236-3, SC-59) surface-mount package, the TL432AQDBZRQ1 uses the same three-pin layout as the TL431 family: cathode, anode, and reference. The package is compatible with standard pick-and-place and reflow profiles. Available on Tape & Reel or Cut Tape — the reel option suits high-volume automated assembly lines.

Frequently asked questions

Is TL432AQDBZRQ1 equivalent to TL431?

The TL432AQDBZRQ1 is functionally equivalent to the TL431 — same adjustable shunt reference topology, same pinout (cathode, anode, reference), same 2.495 V reference voltage. The key difference is the TL432AQDBZRQ1 is AEC-Q100 qualified for automotive use, while the standard TL431 is typically commercial/industrial grade. The TL432 also has a slightly different reference voltage tolerance specification in some variants, but for most feedback-loop applications they are drop-in interchangeable.

Is TL432AQDBZRQ1 AEC-Q100 qualified?

This makes it suitable for under-hood and cabin electronics where reliability is critical.

What is the output current capability of TL432AQDBZRQ1?

The TL432AQDBZRQ1 can sink up to 100 mA of continuous cathode current. This is the maximum current the shunt can handle while maintaining regulation. For reference, the minimum cathode current required to stay in regulation is 700 µA — the bias resistor must be chosen to keep the cathode current above this floor at all operating conditions.