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Adjustable precision shunt regulator

Same as: TL431CLPRE3   This part number is identical to the part number listed above. You can only order quantities of the part number listed above.

Inventory: 126,430
Download data sheet for the TL431
  |   View additional information for the TL431

Quality information

RoHS Yes
Lead finish / Ball material SN
MSL rating / Peak reflow N/A for Pkg Type
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Operating temperature range (°C) Package qty | Carrier:
TO-92 (LP) | 3 C (0 to 70) 2,000 | LARGE T&R
View more packaging information

Features for the  TL431

  • Reference Voltage Tolerance at 25°C
    • 0.5% (BGrade)
    • 1% (A Grade)
    • 2% (StandardGrade)
  • Adjustable Output Voltage: Vref to 36 V
  • Operation From −40°C to 125°C
  • Typical Temperature Drift (TL43xB)
    • 6 mV (CTemp)
    • 14 mV (I Temp, Q Temp)
  • Low Output Noise
  • 0.2-Ω Typical Output Impedance
  • Sink-Current Capability: 1 mA to 100 mA

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Description for the TL431

The TL431LI /TL432LI are pin-to-pin alternatives to TL431 / TL432.TL43xLI offers better stability, lower temperature drift (VI(dev)), andlower reference current (Iref) for improved systemaccuracy.

The TL431 and TL432 devices are three-terminal adjustable shunt regulators, withspecified thermal stability over applicable automotive, commercial, and military temperatureranges. 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 impedanceof 0.2 Ω. Active output circuitry provides a very sharp turn-on characteristic, making thesedevices excellent replacements for Zener diodes in many applications, such as onboard regulation,adjustable power supplies, and switching power supplies. The TL432 device has exactly the samefunctionality and electrical specifications as the TL431 device, but has different pinouts for theDBV, DBZ, and PK packages.

Both the TL431 and TL432 devices are offered in three grades, with initial tolerances (at25°C) of 0.5%, 1%, and 2%, for the B, A, and standard grade, respectively. In addition, low outputdrift versus temperature ensures good stability over the entire temperature range.

The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devicesare characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized foroperation from –40°C to 125°C.


Qty Price(USD)
1-99 $0.115
100-249 $0.078
250-999 $0.060
1,000+ $0.040

Additional package qty | carrier options

Package qty | Carrier 1,000 | BULK
Inventory 121,712
Qty | Price (USD) 1ku | $0.071 1-99 $0.204 100-249 $0.138 250-999 $0.107 1,000+ $0.071
Package qty | Carrier 2,000 | AMMO
Inventory 9,705
Qty | Price (USD) 1ku | $0.071 1-99 $0.204 100-249 $0.138 250-999 $0.107 1,000+ $0.071