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ncp1117lpst50t3g

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

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README

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NCP1117LPST50T3G

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

NCP1117LPST50T3G 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 GND power_in Ground reference pin. For the fixed 5.0 V version (ST50), this pin is the device ground return; the internal resistor divider is included within the device and ground current I_gnd is 550 uA typical. All voltages are referenced to this pin.
2 Vout power_out Regulated output of the LDO, fixed at 5.0 V nominal (4.900 V min / 5.100 V max at TJ=25 C, 6.5 V<=Vin<=12 V, Io=10 mA). A minimum 10 uF output capacitor (20 mOhm <= ESR <= 20 Ohm) must be connected from this pin to ground to ensure stability. The SOT-223 heatsink tab is internally connected to this pin.
3 Vin power_in Regulator input pin, up to 18 V max DC input voltage. A large storage capacitor (20 mOhm <= ESR <= 20 Ohm) is typically connected from this pin to ground to prevent input sag during load transients. Vin must always be at least 1.3 V (typ dropout) higher than Vout for proper regulation.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-223
Category PMIC
Pins 3

Ordering variants

  • NCP1117LPST50T3GST15T3G
  • NCP1117LPST50T3GST18T3G
  • NCP1117LPST50T3GST25T3G
  • NCP1117LPST50T3GST33T3G
  • NCP1117LPST50T3G
  • NCP1117LPST50T3GSTADT3G
  • NCP1117LPST50T3GDT18RKG
  • NCP1117LPST50T3GDT33RKG
  • NCP1117LPST50T3GDTADJRKG

CAD (KiCad official)

  • Symbol: NCP1117LPST50T3G
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: ncp1117lpst50t3g-etched.step / ncp1117lpst50t3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp1117lpst50t3g.step / ncp1117lpst50t3g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (None pp, sha256 a132722bb067cb20, 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

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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