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TL431CDG4

TL431CDG4 Shunt Voltage Reference, Adjustable 2.495V to 36V

MPNTL431CDG4
End of Life

Texas Instruments TL431CDG4, adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 8-SOIC surface mount, 0°C to 70°C.

$0.1300Ref. price · indicative, final on quote
Texas Instruments TL431CDG4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL431CDG4 specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode1 mA
Operating temperature0°C~70°C(TA)
PackageTube
Tolerance±2.2%
Case8-SOIC (0.154\", 3.90mm Width)

Product details

Adjustable shunt reference for precision regulation loops

The ±2.2% tolerance on the reference voltage is tighter than the standard 2% grade, which reduces the worst-case error budget in the regulation loop without requiring a trim pot.

Output current and cathode current limits

Rated for 100 mA continuous output current, the TL431CDG4 can sink enough current to drive an optocoupler LED directly in a feedback loop, or to bias a pass transistor in a linear regulator. The minimum cathode current is 1 mA, which sets the lower bound on the bias resistor value for proper regulation.

Frequently asked questions

What is the closest pin-compatible alternative to TL431CDG4?

The TL431CDG4 is a standard TL431 variant in an 8-SOIC package. Any TL431 in the same 8-SOIC footprint with a commercial temperature range and ±2.2% tolerance is a direct functional equivalent. The base part number TL431 covers many grade and package options; confirm the specific tolerance and temperature grade before substituting.

Is TL431CDG4 RoHS compliant?

The TL431CDG4 is part of Texas Instruments' Green (RoHS & no Sb/Br) portfolio. The suffix 'G4' indicates RoHS compliance and green molding compound.