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TL431K-T92-K
Public Made by Adomby adom
UTC(Unisonic Tech) Voltage References, TO-92-3. 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
markdownTL431K-T92-K
UTC(Unisonic Tech) · Voltage References · TO-92-3
TL431K-T92-K from UTC(Unisonic Tech), in a TO-92-3. 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 | REFERENCE | passive | Reference input (R) of the adjustable regulator; the output voltage is set from the approximately 2.5V VREF through external resistors R1 and R2, with VOUT=(1+R1/R2)×VREF. |
| 2 | ANODE | passive | Anode (A) is the common return terminal of the regulator, and cathode current must reach at least IKA(MIN) of 0.3 to 0.5 mA for regulation. |
| 3 | CATHODE | passive | Cathode (K) is the regulated output, operating from VREF to 36V with cathode current from 1 to 100 mA and an absolute maximum cathode voltage of 37V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | TO-92-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage | ∆VREF/∆VKA | -1 | -2.7 | mV/V | VKA=10V~VREF | 3 | |
| Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage | ∆VREF/∆VKA | -0.5 | -2 | mV/V | VKA=36V~10V, IKA=10mA | 3 | |
| Deviation of reference Input Voltage Over temperature | ∆VREF | 4.5 | 17 | mV | VKA=VREF,IKA=10mA, 0°C ≤TA≤70°C | 3 | |
| Reference Input Current | IREF | 1.5 | 4 | µA | IKA=10mA, R1=10kΩ, R2=∞ | 3 | |
| Deviation of Reference Input Current Over Full Temperature Range | ∆IREF | 0.4 | 1.2 | µA | IKA=10mA, R1=10kΩ, R2=∞, TA=full Temperature | 3 | |
| Minimum Cathode Current for Regulation | IKA(MIN) | 0.3 | 0.5 | mA | VKA=VREF | 3 | |
| Off-State Cathode Current | IKA(OFF) | 0.05 | 1 | µA | VKA=36V, VREF=0 | 3 | |
| Dynamic Impedance | ZKA | 0.15 | 0.5 | Ω | VKA=VREF, IKA=1~100mA, f≤1.0kHz | 3 | |
| Cathode Voltage | VKA | 36 | V | 3 | |||
| Cathode Current | IKA | 1 | 100 | mA | 3 | ||
| Cathode Voltage | VKA | 37 | V | 3 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | 3 | ||
| Reference Input Current Range | IREF | -0.05 | 10 | mA | 3 | ||
| Power Dissipation | PD | 770 | mW | TO-92 package | 3 | ||
| Operating Junction Temperature | TJ | 150 | °C | 3 | |||
| Operating Ambient Temperature | TOPR | -40 | 85 | °C | 3 | ||
| Storage Temperature | TSTG | -65 | 150 | °C | 3 |
CAD (KiCad official)
- Symbol:
TL431K-T92-K - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
tl431k-t92-k-etched.step/tl431k-t92-k-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431k-t92-k.step/tl431k-t92-k.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC(Unisonic Tech) datasheet (6 pp, sha256
cbc7e42ea3607271, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).