# TL431CLPRPG

**onsemi** · Voltage Reference · TO-92-2.54mm

TL431CLPRPG from onsemi, in a TO-92-2.54mm. 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 of the TL431 that sets the output via the external divider, with a continuous reference input current range of −0.05 to +10 mA. |
| 2 | Anode | passive | Anode terminal of the shunt regulator, with cathode-to-anode voltage rated at 37 V maximum (recommended Vref to 36 V). |
| 3 | Cathode | passive | Cathode terminal of the shunt regulator, recommended to operate at 1.0 mA to 100 mA with a continuous absolute range of −100 to +150 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-92-2.54mm |
| 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 Input Voltage (25°C) | Vref | 2.44 | 2.495 | 2.55 | V | VKA = Vref, IK = 10 mA, TA = 25°C | 3 |
| Reference Input Voltage (over temperature) | Vref | 2.423 |  | 2.567 | V | VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (Note 2) | 3 |
| Reference Input Voltage Deviation Over Temperature Range | Vref |  | 3 | 17 | mV | VKA = Vref, IK = 10 mA | 3 |
| Ratio of Change in Reference Input Voltage to Cathode Voltage (VKA = 10 V to Vref) | Vref/VKA |  | -1.4 | -2.7 | mV/V | IK = 10 mA (Figure 2), VKA = 10 V to Vref | 3 |
| Ratio of Change in Reference Input Voltage to Cathode Voltage (VKA = 36 V to 10 V) | Vref/VKA |  | -1 | -2 | mV/V | IK = 10 mA (Figure 2), VKA = 36 V to 10 V | 3 |
| Reference Input Current (25°C) | Iref |  | 1.8 | 4 | μA | IK = 10 mA, R1 = 10 k, R2 = ∞, TA = 25°C | 3 |
| Reference Input Current (over temperature) | Iref |  |  | 5.2 | μA | IK = 10 mA, R1 = 10 k, R2 = ∞, TA = Tlow to Thigh (Note 2) | 3 |
| Reference Input Current Deviation Over Temperature Range | Iref |  | 0.4 | 1.2 | μA | IK = 10 mA, R1 = 10 k, R2 = ∞ | 3 |
| Minimum Cathode Current For Regulation | Imin |  | 0.5 | 1 | mA | VKA = Vref | 3 |
| Off-State Cathode Current | Ioff |  | 20 | 1000 | nA | VKA = 36 V, Vref = 0 V | 3 |
| Dynamic Impedance | /ZKA/ |  | 0.22 | 0.5 | Ω | VKA = Vref, IK = 1.0 mA to 100 mA, f ≤ 1.0 kHz | 3 |
| Voltage reference tolerance (ordering table, TL431C grade) |  | -2.2 |  | 2.2 | % | Tolerance code for TL431CLPRPG per ordering table | 13 |
| Cathode to Anode Voltage (recommended) | VKA |  |  | 36 | V |  | 2 |
| Cathode Current (recommended) | IK | 1 |  | 100 | mA |  | 2 |
| Cathode to Anode Voltage (absolute maximum) | VKA |  |  | 37 | V |  | 2 |
| Cathode Current Range, Continuous | IK | -100 |  | 150 | mA |  | 2 |
| Reference Input Current Range, Continuous | Iref | -0.05 |  | 10 | mA |  | 2 |
| Operating Junction Temperature | TJ |  |  | 150 | °C |  | 2 |
| Operating Ambient Temperature Range (TL431C grade) | TA | 0 |  | 70 | °C | TL431C, TL431AC, TL431BC | 2 |
| Storage Temperature Range | Tstg | -65 |  | 150 | °C |  | 2 |
| ESD Human Body Model | HBM | 2000 |  |  | V | JEDEC JESD22-A114F; datasheet prints >2000 | 2 |
| ESD Machine Model | MM | 200 |  |  | V | JEDEC JESD22-A115C; datasheet prints >200 | 2 |
| ESD Charged Device Model | CDM | 500 |  |  | V | JEDEC JESD22-C101E; datasheet prints >500 | 2 |
| Thermal Resistance, Junction-to-Ambient | RJA |  | 178 |  | °C/W | D, LP Suffix Package | 3 |
| Thermal Resistance, Junction-to-Case | RJC |  | 83 |  | °C/W | D, LP Suffix Package | 3 |

## CAD (KiCad official)

- Symbol: `TL431CLPRPG`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92-2.54mm (KiCad packages3D, STEP)
- 3D model files: `tl431clprpg-etched.step` / `tl431clprpg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431clprpg.step` / `tl431clprpg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895111933530112) (18 pp, sha256 `922e22f14c14db6a`, retrieved 2026-10-09, 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/tl431clprpg-datasheet.pdf)