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Texas Instruments TL432AQDBVR — Analog & Data Acquisition

TL432AQDBVR Shunt Regulator, Adjustable, ±1%, SOT-23-5

MPNTL432AQDBVR
Active

Texas Instruments TL432AQDBVR, adjustable shunt voltage reference, ±1% tolerance, 100 mA output, 2.495 V to 36 V adjustable, SOT-23-5 package, -40°C to 125°C.

$0.1495Ref. price · indicative, final on quote
Texas Instruments TL432AQDBVR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL432AQDBVR specifications
ParameterValue
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%
CaseSC-74A, SOT-753

Product details

Precision shunt reference for industrial and automotive rails

It provides a 2.495 V reference between the REF and ANODE pins, with the output voltage programmable up to 36 V using two external resistors. The ±1% tolerance on the reference voltage suits precision power supply feedback loops, isolated DC-DC secondary-side regulation, and voltage monitoring circuits where tighter than the standard ±2% grade is needed without moving to a 0.5% device.

Output current and cathode current — sizing the bias resistor

Rated for 100 mA continuous output current, the TL432AQDBVR can sink enough current to drive the optocoupler LED in a feedback loop or pull down a pull-up resistor in a window comparator. For a typical 5 V rail feeding the cathode through a 1 kΩ resistor, the bias current lands around 4.3 mA — well above the 700 µA minimum and leaving headroom for the optocoupler current.

The SOT-23-5 package (SC-74A, SOT-753) is a 5-pin surface-mount footprint with 0.95 mm pitch — standard for small-signal placement on dense PCBs.

Frequently asked questions

Is TL432AQDBVR equivalent to TL431 and can it replace TL431 directly?

The TL432 is functionally equivalent to the TL431 — same 2.495 V reference, same adjustable output to 36 V, same ±1% tolerance option. The difference is the pinout: the TL432 swaps the REF and CATHODE pins relative to the TL431. On a TL431 layout the REF pin is typically pin 1 and CATHODE is pin 3; on the TL432AQDBVR in SOT-23-5 the REF is pin 3 and CATHODE is pin 1. A direct drop-in replacement requires a board spin or a cross-over pattern; it is not pin-compatible without a layout change.

What is the tolerance of TL432AQDBVR?

The TL432AQDBVR is specified with ±1% tolerance on the reference voltage.