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ATL431BIDBZR

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

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ATL431BIDBZR

Texas Instruments · Voltage References · SOT-23-3

ATL431BIDBZR from Texas Instruments, in a SOT-23-3. 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 CATHODE bidirectional Shunt current/voltage input (cathode); recommended cathode voltage Vref to 36V, absolute max 40V, cathode current 0.035mA to 100mA.
2 REF input Reference input, threshold relative to the common anode; Vref is about 2.5V and absolute max reference input current is 10mA.
3 ANODE power_in Common pin, normally connected to ground.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-3
Category Power Management ICs
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 Vref 2487 2500 2512 mV VKA = Vref, IKA = 1mA, TA = 25°C 4
Deviation of reference input voltage over full temperature range VI(dev) 5 15 mV VKA = Vref, IKA = 1mA, ATL43xBI; TA = -40°C to 85°C 4
Ratio of change in reference voltage to change in cathode voltage (Vref to 10V) ΔVref/ΔVKA -0.4 -2.7 mV/V IKA = 1mA, ΔVKA = 10V − Vref 4
Ratio of change in reference voltage to change in cathode voltage (10V to 36V) ΔVref/ΔVKA -0.1 -2 mV/V IKA = 1mA, ΔVKA = 36V − 10V 4
Reference input current Iref 30 150 nA IKA = 1mA, R1 = 10kΩ, R2 = ∞ 4
Deviation of reference input current over full temperature range II(dev) 20 50 nA IKA = 1mA, R1 = 10kΩ, R2 = ∞ 4
Minimum cathode current for regulation Imin 20 35 µA VKA = Vref 4
Off-state cathode current Ioff 0.05 0.2 µA VKA = 36V, Vref = 0 4
Dynamic impedance /zKA/ 0.05 0.3 Ω VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA 4
Cathode voltage (absolute maximum) VKA 40 V over operating free-air temperature range; with respect to ANODE 3
Continuous cathode current (absolute maximum) IKA -100 150 mA over operating free-air temperature range 3
Reference input current (absolute maximum) II(ref) -0.05 10 mA over operating free-air temperature range 3
Operating virtual junction temperature TJ -40 150 °C over operating free-air temperature range 3
Storage temperature Tstg -65 150 °C 3
ESD HBM V(ESD) -2000 2000 V Human-body model, ANSI/ESDA/JEDEC JS-001 3
ESD CDM V(ESD) -1000 1000 V Charged-device model, JESD22-C101 3
Cathode voltage (recommended) VKA 36 V min printed as Vref 3
Cathode current (recommended) IKA 0.035 100 mA 3
Operating free-air temperature, I Grade TA -40 85 °C I Grade 3
Junction-to-ambient thermal resistance RθJA 331.8 °C/W DBZ (SOT-23), 3 pins 4
Junction-to-case (top) thermal resistance RθJC(top) 106.5 °C/W DBZ (SOT-23), 3 pins 4
Junction-to-board thermal resistance RθJB 64.6 °C/W DBZ (SOT-23), 3 pins 4
Junction-to-top characterization parameter ψJT 4.9 °C/W DBZ (SOT-23), 3 pins 4
Junction-to-board characterization parameter ψJB 62.9 °C/W DBZ (SOT-23), 3 pins 4

CAD (KiCad official)

  • Symbol: ATL431BIDBZR
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: atl431bidbzr-etched.step / atl431bidbzr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atl431bidbzr.step / atl431bidbzr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (31 pp, sha256 a6f3040c07336fbd, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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