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NCV8664ST50T3G

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by Ray

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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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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Contents

README

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NCV8664ST50T3G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

NCV8664ST50T3G from onsemi, in a SOT-223. 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 VIN power_in Unregulated input voltage. Operating range 4.5 V to 45 V; absolute-max -42 V to +45 V. Recommended input capacitor 100 nF (or 1.0 µF for measurement circuit).
2 GND power_in Ground; substrate. On SOT-223 the tab is electrically the same GND net as pin 2 and serves as the best thermal connection to the die.
TAB GND power_in Metal tab; ground/substrate and primary thermal path to the die. Solder to a copper pour (≈1 oz, 100 mm²) for the rated R_θJA of 99 °C/W.
3 VOUT power_out Regulated output voltage; collector of the internal PNP pass transistor. 5.0 V ±2.0 % (T50/x=5 variant), rated 150 mA, current-limited to 150-500 mA, short-circuit limit 100-500 mA. Requires C_OUT ≥ 10 µF (5.0 V version) with ESR ≤ 9.0 Ω for loop stability.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-223
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • NCV8664ST50T3G
  • NCV8664ST50T3GST33T3G
  • NCV8664ST50T3GDT50
  • NCV8664ST50T3GDT33
  • NCV8664ST50T3GD50
  • NCV8664ST50T3GD33

CAD (KiCad official)

  • Symbol: NCV8664ST50T3G
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ncv8664st50t3g.step 64 KB You want the bare part, or you mark your own boards.
ncv8664st50t3g-etched.step 2.8 MB You want the part with NCV8664ST50T3G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 662 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: onsemi datasheet (19 pp, sha256 f43695bba364dfd2, retrieved 2026-08-17, tier: manufacturer)
  • 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