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TLV431AIDBZR

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Texas Instruments Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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TLV431AIDBZR

Texas Instruments · Voltage Reference · SOT-23

TLV431AIDBZR from Texas Instruments, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 REF input Reference input. Threshold relative to the common anode; the device regulates the cathode voltage so REF equals VREF (typ 1.24 V). Reference terminal current is typically 0.15 uA.
2 CATHODE bidirectional Shunt current/voltage input (K). Sinks the regulated shunt current; recommended cathode current 0.1 mA to 15 mA, absolute max +/-20 mA, max cathode voltage 7 V. Typical dynamic impedance 0.25 ohm.
3 ANODE power_in Common terminal (A), normally connected to ground. All voltages in the datasheet are referenced to this terminal.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • TLV431AIDBZR
  • TLV431AIDBZT
  • TLV431AIDBZRIDBVR
  • TLV431AIDBZRIDBVT
  • TLV431AIDBZRIDCKR
  • TLV431AIDBZRIDCKT
  • TLV431AIDBZRIDR
  • TLV431AIDBZRIPK
  • TLV431AIDBZRLP
  • TLV431AIDBZRLPR

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reference voltage, full temperature range (TLV431AI) VREF 1.215 1.265 V TLV431AI, TA = full range; VKA = VREF, IK = 10 mA (see Figure 19) 6
Reference voltage at 25°C (TLV431A) VREF 1.228 1.24 1.252 V TA = 25°C; VKA = VREF, IK = 10 mA (see Figure 19) 6
VREF deviation over full temperature range (TLV431AI) VREF(dev) 6 20 mV TLV431AI; VKA = VREF, IK = 10 mA (see Figure 19) 6
Ratio of VREF change to cathode voltage change ΔVREF/ΔVKA -1.5 -2.7 mV/V VKA = VREF to 6 V, IK = 10 mA (see Figure 20) 6
Reference terminal current Iref 0.15 0.5 µA IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 20) 6
Iref deviation over full temperature range (TLV431AI) Iref(dev) 0.1 0.4 µA TLV431AI; IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 20) 6
Minimum cathode current for regulation (TLV431AC/AI) IK(min) 55 80 µA TLV431AC/AI; VKA = VREF (see Figure 19) 6
Off-state cathode current IK(off) 0.001 0.1 µA VREF = 0, VKA = 6 V (see Figure 21) 6
Dynamic impedance /zKA/ 0.25 0.4 Ω VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 15 mA (see Figure 19) 6
Cathode voltage (recommended) VKA 6 V 4
Cathode current (recommended) IK 0.1 15 mA 4
Operating free-air temperature range (TLV431_I) TA -40 85 °C TLV431_I 4
Cathode voltage (absolute maximum) VKA 7 V 4
Continuous cathode current range (absolute maximum) IK -20 20 mA 4
Reference current range (absolute maximum) Iref -0.05 3 mA 4
Operating virtual junction temperature (absolute maximum) 150 °C 4
Storage temperature range (absolute maximum) Tstg -65 150 °C 4
Junction-to-ambient thermal resistance RθJA 206 °C/W DBZ (SOT-23-3) package 4
Junction-to-case (top) thermal resistance RθJC(top) 76 °C/W DBZ (SOT-23-3) package 4

CAD (KiCad official)

  • Symbol: TLV431AIDBZR
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: tlv431aidbzr-etched.step / tlv431aidbzr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlv431aidbzr.step / tlv431aidbzr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
tlv431aidbzr.step 59 KB You want the bare part, or you mark your own boards.
tlv431aidbzr-etched.step 1.6 MB You want the part with TLV431AIDBZR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 425 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (46 pp, sha256 4c8a6bd9d4c66c01, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF