component
NCP431ACSNT1G
Public Made by Adomby adom
onsemi Voltage Reference, SOT-23-3. 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
markdownNCP431ACSNT1G
onsemi · Voltage Reference · SOT-23-3
NCP431ACSNT1G from onsemi, in a SOT-23-3. 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 of the programmable shunt regulator, held at Vref of 2.5 V nominal, with Iref of 81 nA typical and 190 nA maximum at IK = 1 mA. |
| 2 | Cathode | passive | Cathode of the shunt regulator, which can be programmed up to 36 V (VKA recommended maximum 36 V, absolute maximum 37 V) with cathode current from 0.04 mA to 100 mA. |
| 3 | Anode | passive | Anode of the shunt regulator, serving as the common terminal for the cathode-to-anode voltage, with cathode current range of −100 mA to +150 mA continuous. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23-3 |
| 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 (TA = 25°C) | Vref | 2.475 | 2.5 | 2.525 | V | VKA = Vref, IK = 1 mA, TA = 25°C | 3 |
| Reference Input Voltage (over temperature) | Vref | 2.475 | 2.5 | 2.525 | V | VKA = Vref, IK = 1 mA, TA = Tlow to Thigh | 3 |
| Ratio of change in reference input voltage to cathode-anode voltage (VKA = 10 V to Vref) | Vref/VKA | -1.85 | -3.1 | mV/V | IK = 1 mA, VKA = 10 V to Vref | 3 | |
| Ratio of change in reference input voltage to cathode-anode voltage (VKA = 36 V to 10 V) | Vref/VKA | -0.8 | -1.8 | mV/V | IK = 1 mA, VKA = 36 V to 10 V | 3 | |
| Reference Input Current | Iref | 81 | 190 | nA | IK = 1 mA, R1 = 220 k, TA = −40°C to +125°C | 3 | |
| Reference Input Current Deviation Over Temperature Range | IrefT | 22 | 55 | nA | IK = 1 mA, R1 = 10 k | 3 | |
| Minimum Cathode Current For Regulation | Imin | 40 | 60 | µA | VKA = Vref | 3 | |
| Off-State Cathode Current | Ioff | 180 | 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 | |
| Cathode To Anode Voltage (recommended) | VKA | 36 | V | Minimum printed as the symbol Vref, not a number | 2 | ||
| Cathode Current (recommended) | IK | 0.04 | 100 | mA | 2 | ||
| Cathode to Anode Voltage (absolute maximum) | VKA | 37 | V | 2 | |||
| Cathode Current Range, Continuous | IK | -100 | 150 | mA | Continuous | 2 | |
| Reference Input Current Range, Continuous | Iref | -5 | 10 | mA | Continuous | 2 | |
| Operating Junction Temperature | TJ | 150 | °C | 2 | |||
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | 2 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Total Power Dissipation (SN suffix) | PD | 0.52 | W | TA = 25°C, SN1 suffix plastic package; derate above 25°C ambient | 2 | ||
| ESD Human Body Model | HBM | 2000 | V | Human Body Model per JEDEC JESD22-A114F (printed as >2000) | 2 | ||
| ESD Charged Device Model | CDM | 1000 | V | Charged Device Model per JEDEC JESD22-C101E (printed as >1000) | 2 | ||
| Thermal Resistance, Junction-to-Ambient (SN suffix, 10 mm2 x 35 µm Cu) | RJA | 255 | °C/W | SN suffix package, 10 mm2 x 35 µm Cu | 2 | ||
| Thermal Resistance, Junction-to-Lead (Lead 3, SN suffix) | RJL | 80 | °C/W | Lead 3, SN suffix package, 10 mm2 x 35 µm Cu | 2 |
CAD (KiCad official)
- Symbol:
NCP431ACSNT1G - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
ncp431acsnt1g-etched.step/ncp431acsnt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ncp431acsnt1g.step/ncp431acsnt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (17 pp, sha256
eebf6db420b91340, retrieved 2026-10-19, 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).