component
TL431KA-TP
Public Made by Adomby adom
MCC(Micro Commercial Components) Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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TL431KA-TP
MCC(Micro Commercial Components) · Voltage Reference · SOT-23
TL431KA-TP from MCC(Micro Commercial Components), 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 input that sets the regulated cathode voltage through the R1/R2 divider; the datasheet gives a reference output voltage of 2.483 to 2.507 V at VKA=VREF and IKA=10 mA, with reference input current of 1.5 µA typical and 4.0 µA maximum. |
| 2 | K | passive | Cathode is the shunt sink terminal, rated for a cathode voltage up to 36 V and a cathode current range of 1.0 to 100 mA. |
| 3 | A | passive | Anode is the common terminal of the shunt regulator, and the datasheet gives no separate voltage or current limit for this pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MCC(Micro Commercial Components) |
| 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 output voltage | Vref | 2.483 | 2.495 | 2.507 | V | VKA=VREF, IKA=10mA | 2 |
| Deviation of reference input voltage over temperature | △Vref / △T | 4.5 | 17 | mV | VKA=VREF, IKA=10mA, Tmin≤Ta≤Tmax | 2 | |
| Ratio of change in reference input voltage to cathode voltage (10V to Vref) | △Vref / △VKA | -1 | -2.7 | mV | △VKA=10V~Vref | 2 | |
| Ratio of change in reference input voltage to cathode voltage (36V to 10V) | △Vref / △VKA | -0.5 | -2 | mV | △VKA=36V~10V | 2 | |
| Reference input current | Iref | 1.5 | 4 | μA | IKA=10mA, R1=10KΩ, R2=∞ | 2 | |
| Deviation of reference input current over full temperature range | △Iref / △T | 0.4 | 1.2 | μA | IKA=10mA, R1=10KΩ, R2=∞, TA=full temperature | 2 | |
| Minimum cathode current for regulation | IKA(min) | 0.45 | 1 | mA | 2 | ||
| Off-state cathode current | IKA(off) | 0.05 | 0.5 | μA | VKA=40V, VREF=0V | 2 | |
| Dynamic impedance | ZKA | 0.15 | 0.5 | Ω | IKA=1 to 100mA, f≤1.0KHz | 2 | |
| Cathode voltage (recommended operating) | VKA | 36 | V | Minimum printed as VREF (symbol, no numeric value) | 1 | ||
| Cathode current range (recommended operating) | IK | 1 | 100 | mA | 1 | ||
| Reference input current range (recommended operating) | IREF | 0.05 | 10 | mA | 1 | ||
| Operating temperature | Topr | -40 | 125 | ℃ | 1 | ||
| Cathode voltage (absolute maximum) | VKA | 37 | V | 1 | |||
| Cathode current range (absolute maximum) | IK | -100 | 150 | mA | 1 | ||
| Power dissipation | PD | 0.3 | W | at 25℃ | 1 | ||
| Storage temperature range | TSTG | -65 | 150 | ℃ | 1 | ||
| Thermal resistance junction to ambient | RθJA | 417 | ℃/W | 1 |
CAD (KiCad official)
- Symbol:
TL431KA-TP - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
tl431ka-tp-etched.step/tl431ka-tp-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431ka-tp.step/tl431ka-tp.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MCC(Micro Commercial Components) datasheet (8 pp, sha256
152ebf0ea9e81727, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).