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TLV431BCDBZR

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Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs tlv431bcdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers tlv431bcdbzr: viewers · Ray 1mo ago
package.json tlv431bcdbzr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json tlv431bcdbzr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
README.md tlv431bcdbzr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
tlv431bcdbzr-etched.fit.json tlv431bcdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tlv431bcdbzr-etched.glb tlv431bcdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tlv431bcdbzr-etched.step tlv431bcdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tlv431bcdbzr.glb Publish 0.1.0 · Ray 1mo ago
tlv431bcdbzr.kicad_mod Publish 0.1.0 · Ray 1mo ago
tlv431bcdbzr.kicad_sym Publish 0.1.0 · Ray 1mo ago
tlv431bcdbzr.lbr Publish 0.1.0 · Ray 1mo ago
tlv431bcdbzr.step Publish 0.1.0 · Ray 1mo ago

TLV431BCDBZR

Texas Instruments · Voltage Reference · SOT-23

TLV431BCDBZR 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 threshold input pin requiring current of 0.15µA to 0.5µA for stable operation.
2 CATHODE bidirectional Shunt-regulated output pin supporting voltage adjustment from 1.24V to 6.0V with cathode current range of 0.1mA to 15mA and typical dynamic output impedance of 0.25Ω.
3 ANODE power_in Common anode ground reference pin; must be connected to system ground.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23
Category Power Management (PMIC)
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Cathode voltage VKA 7 V Voltage values are with respect to the anode terminal 4
Continuous cathode current IK -20 20 mA 4
Reference current Iref -0.05 3 mA 4
Operating virtual junction temperature 150 °C 4
Storage temperature Tstg -65 150 °C 4
Cathode voltage VKA 6 V 4
Cathode current IK 0.1 15 mA 4
Operating free-air temperature (TLV431_C) TA 0 70 °C 4
Reference voltage, TA = 25°C VREF 1.234 1.24 1.246 V VKA = VREF, IK=10mA, TA = 25°C 7
Reference voltage, full temperature range (TLV431BC) VREF 1.227 1.253 V VKA = VREF, IK=10mA, TA = full range 0°C to 70°C 7
VREF deviation over full temperature range (TLV431BC) VREF(dev) 4 12 mV VKA = VREF, IK = 10mA, full temperature range 0°C to 70°C 7
Ratio of VREF change to cathode voltage change -1.5 -2.7 mV/V VKA = VREF to 6V, IK = 10mA 7
Reference terminal current Iref 0.1 0.5 µA IK = 10mA, R1 = 10kΩ, R2 = open 7
Iref deviation over full temperature range (TLV431BC) Iref(dev) 0.05 0.3 µA IK = 10mA, R1 = 10kΩ, R2 = open, full temperature range 0°C to 70°C 7
Minimum cathode current for regulation IK(min) 55 100 µA VKA = VREF 7
Off-state cathode current IK(off) 0.001 0.1 µA VREF = 0, VKA = 6V 7
Dynamic impedance /zKA/ 0.25 0.4 Ω VKA = VREF, f ≤ 1kHz, IK = 0.1mA to 15mA 7
Junction-to-ambient thermal resistance (DBZ) RθJA 206 °C/W 4
Junction-to-case (top) thermal resistance (DBZ) RθJC(top) 76 °C/W 4

CAD (KiCad official)

  • Symbol: TLV431BCDBZR
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: tlv431bcdbzr-etched.step / tlv431bcdbzr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlv431bcdbzr.step / tlv431bcdbzr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (58 pp, sha256 34e0c5a62c65546c, retrieved 2026-09-23, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF