component
TL431AIDBVR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTL431AIDBVR
Texas Instruments · Voltage Reference · SOT-23-5
TL431AIDBVR from Texas Instruments, in a SOT-23-5. 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 | NC | unconnected | No internal connection on the TL431/TL431A/TL431B DBV (SOT-23-5) package pinout. |
| 2 | NC | unconnected | No internal connection, but this pin is attached to the die substrate; the datasheet states it must be connected to ANODE or left open. |
| 3 | CATHODE | bidirectional | Shunt current/voltage (I/O) terminal of the regulator; recommended continuous cathode current range is 1 mA to 100 mA (absolute maximum -100 mA to 150 mA) with cathode voltage up to 37 V absolute maximum (36 V recommended maximum). |
| 4 | REF | input | Reference input threshold voltage relative to the common ANODE pin; must be driven with a reference input current (typical 2 µA, max 4 µA) and is internally regulated to approximately 2.5 V (Vref = 2440-2550 mV typical range) in closed-loop operation. |
| 5 | ANODE | power_in | Common pin of the device, described in the datasheet as typically connected to ground (通常接地); serves as the reference/return terminal for the cathode current and reference voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
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 | 2470 | 2495 | 2520 | mV | VKA = Vref, IKA = 10mA, TA = 25°C | 11 |
| Reference voltage deviation over full temperature range | VI(dev) | 5 | 50 | mV | VKA = Vref, IKA = 10mA; all other devices (not SOT23-3 / TL432) | 11 | |
| Reference voltage change per cathode voltage change | ΔVref / ΔVKA | -1.4 | -2.7 | mV/V | IKA = 10mA, ΔVKA = 10V - Vref | 11 | |
| Reference voltage change per cathode voltage change | ΔVref / ΔVKA | -1 | -2 | mV/V | IKA = 10mA, ΔVKA = 36V - 10V | 11 | |
| Reference input current | Iref | 2 | 4 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 11 | |
| Reference input current deviation over full temperature range | II(dev) | 0.8 | 2.5 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 11 | |
| Minimum cathode current for regulation | Imin | 0.4 | 0.7 | mA | VKA = Vref | 11 | |
| Off-state cathode current | Ioff | 0.1 | 0.5 | µA | VKA = 36V, Vref = 0 | 11 | |
| Dynamic impedance | /ZKA/ | 0.2 | 0.5 | Ω | VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA | 11 | |
| Cathode voltage | VKA | 36 | V | Minimum printed as Vref (not numeric) | 6 | ||
| Continuous cathode current range | IKA | 1 | 100 | mA | 6 | ||
| Operating free-air temperature range (TL43xxI) | TA | -40 | 85 | ℃ | Natural ventilation, TL43xxI grade | 6 | |
| Cathode voltage (absolute maximum) | VKA | 37 | V | Referenced to ANODE | 6 | ||
| Continuous cathode current | IKA | -100 | 150 | mA | 6 | ||
| Reference input current (absolute maximum) | II(ref) | -0.05 | 10 | mA | 6 | ||
| Operating junction temperature | TJ | 150 | °C | 6 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 6 | ||
| Junction-to-ambient thermal resistance | RθJA | 206 | °C/W | DBV (5-pin) package | 6 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 131 | °C/W | DBV (5-pin) package | 6 |
CAD (KiCad official)
- Symbol:
TL431AIDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
tl431aidbvr-etched.step/tl431aidbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431aidbvr.step/tl431aidbvr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (86 pp, sha256
313277b9351e61ed, retrieved 2026-09-22, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).