component
NCP1117DT18RKG
Public Unreviewedby Ray
onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Datasheet-verified pinout, 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
markdownNCP1117DT18RKG
onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)
NCP1117DT18RKG from onsemi, in a TO-252-2(DPAK). 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 for the fixed-output regulator. On fixed-voltage devices (such as the -18 / 1.8 V variant) pin 1 is the ground return; on adjustable versions this same pin serves as the Adjust input tied to the external divider. |
| 2 | VOUT | power_out | Regulated 1.8 V output, capable of sourcing in excess of 1.0 A. Requires a 10 uF output capacitor for stability. The DPAK heatsink tab is internally connected to this pin. |
| 3 | VIN | power_in | Unregulated positive input voltage, up to 20 V absolute maximum. Requires a 10 uF input capacitor. Must be at least ~1.1 V above VOUT to maintain regulation at full load. |
| TAB | VOUT (Tab) | power_out | Heatsink tab; electrically connected internally to Pin 2 (VOUT). Provides thermal path to PCB copper (Junction-to-Case = 6.0 C/W). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-252-2(DPAK) |
| Category | PMIC |
| Pins | 4 |
Ordering variants
Same part, different packaging or reel option.
NCP1117DT18RKGNCP1117DT18GNCP1117DT18RK4GNCP1117DT18RKGST18T3G
CAD (KiCad official)
- Symbol:
NCP1117DT18RKG - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (19 pp, sha256
5772faecb9389609, 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).