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ncp4318alcdr2g

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by Ray

onsemi AC-DC Controllers and Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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NCP4318ALCDR2G

onsemi · AC-DC Controllers and Regulators · SOIC-8

NCP4318ALCDR2G from onsemi, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GATE1 output Gate drive output for SR MOSFET1. Adaptive clamp at 10 V (heavy load) or 6 V (light load). Peak sourcing 1.5 A / sinking 4.5 A, 30 ns typical turn-on/turn-off propagation delay. Max rated 17 V.
2 GND power_in Device ground. All voltages are referenced to this pin.
3 VS1 input Synchronous rectifier source sense input for SR1. Recommended operating range -0.3 V to 5 V (max -0.3 V to 5.5 V DC, -4 V to 5.5 V dynamic 200 ns pulse).
4 VD1 input Synchronous rectifier drain sense input for SR1. IOFFSET1 current source (~310 uA typ, 10 uA/step) flows out of this pin so an external series resistor sets the SR turn-off threshold. IOFFSET1 is disabled during VDD UVLO or green mode. Max rated 200 V.
5 VS2 input Synchronous rectifier source sense input for SR2. Recommended operating range -0.3 V to 5 V (max -0.3 V to 5.5 V DC, -4 V to 5.5 V dynamic 200 ns pulse).
6 VD2 input Synchronous rectifier drain sense input for SR2. IOFFSET2 current source (~310 uA typ, 10 uA/step) flows out of this pin so an external series resistor sets the SR turn-off threshold. IOFFSET2 is disabled during VDD UVLO or green mode. Max rated 200 V.
7 VDD power_in Supply voltage. Recommended 0 V-35 V, absolute max 37 V. Turn-on UVLO ~4.0 V, turn-off ~3.8 V. SR gate enabled above VDD_GATE_ON (~6.5-7.1 V).
8 GATE2 output Gate drive output for SR MOSFET2. Adaptive clamp at 10 V (heavy load) or 6 V (light load). Peak sourcing 1.5 A / sinking 4.5 A, 30 ns typical turn-on/turn-off propagation delay. Max rated 17 V.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-8
Category PMIC
Pins 8

Ordering variants

  • NCP4318ALCDR2G
  • NCP4318ALCDR2GBLCDR2G
  • NCP4318ALCDR2GALSDR2G
  • NCP4318ALCDR2GAHJDR2G
  • NCP4318ALCDR2GALKDR2G

CAD (KiCad official)

  • Symbol: NCP4318ALCDR2G
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: onsemi datasheet (None pp, sha256 41429236d5d836f1, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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