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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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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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tlv431bqfta.step/tlv431bqfta.glbare 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, 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).
# 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885141678657536) (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](docs/tlv431bqfta-datasheet.pdf)