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NCP431BISNT1G

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onsemi Voltage References, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsncp431bisnt1gfactory-2.0.0extractor-text

Verified NCP431BISNT1G

by Ray · last 7 Nov 2026 · 1 record · files match
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Verification log 1 record

7 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: NCP431BISNT1G · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 21-page datasheet
  • ✓distributor: lcsc C603736, digikey NCP431BISNT1GOSTR-ND, mouser 863-NCP431BISNT1G
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-nhnxafsm/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ncp431bisnt1g.kicad_sym✓ ncp431bisnt1g.kicad_mod✓ ncp431bisnt1g.step
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Contents

README

markdown

NCP431BISNT1G

onsemi · Voltage References · SOT-23

NCP431BISNT1G from onsemi, 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 Reference input Reference input pin of the NCP431 programmable shunt regulator, used with two external resistors to set the cathode voltage from Vref up to 36 V.
2 Cathode passive Cathode of the shunt regulator, with VKA from Vref to 36 V (37 V absolute maximum) and cathode current of 0.04 mA to 100 mA recommended.
3 Anode passive Anode of the shunt regulator, connected to the most negative circuit potential (ground) in typical use.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23
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
Reference Input Voltage (TA=25°C) Vref 2.4875 2.5 2.5125 V VKA = Vref, IK = 1 mA, TA = 25°C 4
Reference Input Voltage (TA=Tlow to Thigh) Vref 2.4775 2.5 2.5125 V VKA = Vref, IK = 1 mA, TA = Tlow to Thigh 4
Tolerance (ordering code 0.5%) -0.5 0.5 % NCP431BISNT1G ordering tolerance, TA = 25°C 14
Reference Input Voltage Deviation Over Temperature Range VrefT 5 10 mV VKA = Vref, IK = 1 mA 4
Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage (VKA = 10 V to Vref) dVref/dVKA -1.85 -3.1 mV/V IK = 1 mA, VKA = 10 V to Vref 4
Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage (VKA = 36 V to 10 V) dVref/dVKA -0.8 -1.8 mV/V IK = 1 mA, VKA = 36 V to 10 V 4
Reference Input Current Iref 81 190 nA IK = 1 mA, R1 = 220 k, R2 = ; TA = −40°C to +125°C 4
Reference Input Current Deviation Over Temperature Range IrefT 22 55 nA IK = 1 mA, R1 = 10 k, R2 = 4
Minimum Cathode Current For Regulation Imin 40 60 µA VKA = Vref 4
Off-State Cathode Current Ioff 180 1000 nA VKA = 36 V, Vref = 0 V 4
Dynamic Impedance /ZKA/ 0.22 0.5 Ω VKA = Vref, IK = 1.0 mA to 100 mA, f 1.0 kHz 4
Equivalent Full-Range Temperature Coefficient 50 ppm/°C Equivalent full-range temperature coefficient (Features) 1
Cathode to Anode Voltage (recommended) VKA 36 V Vref to 36 V 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 2
Thermal Resistance, Junction-to-Ambient (SN suffix) RθJA 255 °C/W SN suffix package (10 mm2 x 35 µm Cu) 2
Thermal Resistance, Junction-to-Lead (Lead 3, SN suffix) RθJL 80 °C/W SN suffix package (10 mm2 x 35 µm Cu) 2

CAD (KiCad official)

  • Symbol: NCP431BISNT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ncp431bisnt1g-etched.step / ncp431bisnt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp431bisnt1g.step / ncp431bisnt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (21 pp, sha256 55239a8ff5795573, retrieved 2026-11-07, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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