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TLV431BQFTA

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

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Contents

README

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TLV431BQFTA

Diodes Incorporated · Voltage Reference · SOT-23

TLV431BQFTA from Diodes Incorporated, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 REF input Reference (feedback) input that the device regulates to VREF = 1.24 V typical; reference input current is 0.15 µA typical and 0.5 µA maximum at R1 = 10 kΩ, R2 open.
2 CATHODE passive Cathode terminal of the shunt regulator, with cathode voltage rated up to 18 V recommended (20 V absolute maximum) and cathode current of 0.1 mA to 15 mA recommended (-20 mA to 20 mA absolute maximum).
3 ANODE passive Anode terminal, the return path of the shunt regulator; the datasheet gives no separate anode rating beyond the cathode current limits of -20 mA to 20 mA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
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
Reference Voltage (TA = +25°C) VREF 1.234 1.24 1.246 V VKA = VREF, TA = +25°C 3
Reference Voltage (TA = 0°C to +70°C) VREF 1.227 1.253 V VKA = VREF, TA = 0°C to +70°C 3
Reference Voltage (TA = -40°C to +85°C) VREF 1.224 1.259 V VKA = VREF, TA = -40°C to +85°C 3
Reference Voltage (TA = -40°C to +125°C) VREF 1.221 1.265 V VKA = VREF, TA = -40°C to +125°C 3
Deviation of Reference Voltage Over Full Temperature Range (TA = 0°C to +70°C) VREF(DEV) 4 12 mV VKA = VREF, TA = 0°C to +70°C 3
Deviation of Reference Voltage Over Full Temperature Range (TA = -40°C to +85°C) VREF(DEV) 6 20 mV VKA = VREF, TA = -40°C to +85°C 3
Deviation of Reference Voltage Over Full Temperature Range (TA = -40°C to +125°C) VREF(DEV) 11 31 mV VKA = VREF, TA = -40°C to +125°C 3
Ratio of Change in Reference Voltage to the Change in Cathode Voltage ΔVREF/ΔVKA -1.5 -2.7 mV/V VKA for VREF to 6V 3
Reference Input Current IREF 0.15 0.5 µA R1 = 10kΩ, R2 = OC 3
IREF Deviation Over Full Temperature Range (TA = 0°C to +70°C) IREF(DEV) 0.05 0.3 µA R1 = 10kΩ, R2 = OC, TA = 0°C to +70°C 3
IREF Deviation Over Full Temperature Range (TA = -40°C to +85°C) IREF(DEV) 0.1 0.4 µA R1 = 10kΩ, R2 = OC, TA = -40°C to +85°C 3
IREF Deviation Over Full Temperature Range (TA = -40°C to +125°C) IREF(DEV) 0.15 0.5 µA R1 = 10kΩ, R2 = OC, TA = -40°C to +125°C 3
Minimum Cathode Current for Regulation (TA = 0°C to +70°C) IKMIN 55 80 µA VKA = VREF, TA = 0°C to +70°C 3
Minimum Cathode Current for Regulation (TA = -40°C to +85°C) IKMIN 55 80 µA VKA = VREF, TA = -40°C to +85°C 3
Minimum Cathode Current for Regulation (TA = -40°C to +125°C) IKMIN 55 100 µA VKA = VREF, TA = -40°C to +125°C 3
Off-State Current IK(OFF) 0.001 0.1 µA VKA = 18V, VREF = 0V 3
Dynamic Output Impedance ZKA 0.25 0.4 Ω VKA = VREF, f = <1kHz, IK = 0.1 to 15mA 3
Cathode Voltage VKA 18 V 2
Cathode Current IKA 0.1 15 mA 2
Operating Ambient Temperature Range TA -40 125 °C 2
Cathode Voltage VKA 20 V Ratings apply to ambient temperature at +25°C 2
Continuous Cathode Current IKA -20 20 mA Ratings apply to ambient temperature at +25°C 2
Reference Input Current Range IREF -0.05 3 mA Ratings apply to ambient temperature at +25°C 2
Input Supply Voltage (Relative to Ground) VIN -0.03 18 V Ratings apply to ambient temperature at +25°C 2
Operating Junction Temperature TJ -40 150 °C Ratings apply to ambient temperature at +25°C 2
Storage Temperature TS -65 150 °C Ratings apply to ambient temperature at +25°C 2
ESD Susceptibility Human Body Model HBM 4 kV Ratings apply to ambient temperature at +25°C 2
ESD Susceptibility Machine Model MM 400 V Ratings apply to ambient temperature at +25°C 2
ESD Susceptibility Charged Device Model CDM 1 kV Ratings apply to ambient temperature at +25°C 2
Package Thermal Resistance, Junction to Ambient (SOT23) JA 380 °C/W 2
Package Power Dissipation (SOT23) PDIS 330 mW TA = +25°C, TJ = +150°C 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208  Weight: 0.009 grams (Approximate) 13

CAD (KiCad official)

  • Symbol: TLV431BQFTA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: tlv431bqfta-etched.step / tlv431bqfta-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlv431bqfta.step / tlv431bqfta.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (14 pp, sha256 f4c428fc40e3ab42, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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