NCP1117DTARKG

@@ -0,0 +1,48 @@+# NCP1117DTARKG++**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK++NCP1117DTARKG from onsemi, in a 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 | Adjust/Ground | input | For fixed-output variants (e.g. XT285 for 2.85 V, XT33 for 3.3 V, XT50 for 5.0 V, XT12 for 12 V), this is the Ground return pin. For the adjustable variant (XTA), this is the Adjust pin - feedback node with a 1.25 V reference (Vref = 1.238-1.262 V) and an adjust-pin current of ~52 μA (max 120 μA); output = Vref × (1 + R2/R1) + Iadj × R2. |+| 2 | Output | power_out | Regulated positive output. Sources up to 1.0 A (typical current limit 1.5 A, min 1.0 A, max 2.2 A). Requires a 10 μF output capacitor for stability. The DPAK heatsink tab is internally connected to this Output pin (pin 2). |+| 3 | Input | power_in | Unregulated positive input supply, up to 20 V maximum (Vin abs max = 20 V). Requires a 10 μF input capacitor. Output current must not exceed 1.0 A when Vin > 12 V. Dropout voltage typically 0.95 V at 100 mA, 1.07 V at 800 mA. |+| TAB | Tab | power_out | Thermal heatsink tab, internally connected to pin 2 (Output). Used for heat dissipation to the PCB copper pour; θJA = 67 °C/W (min-size pad), θJC = 6.0 °C/W for the DPAK package. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | DPAK |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `NCP1117DTARKGDTARKG`+- `NCP1117DTARKGDTRKG`+- `NCP1117DTARKGDTG`+- `NCP1117DTARKGSTARKG`+- `NCP1117DTARKGSTRKG`+- `NCP1117DTARKGSTG`++## CAD (KiCad official)++- Symbol: `NCP1117DTARKG`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: DPAK (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/ncp1117dtark-d.pdf) (17 pp, sha256 `e6a781dcd70d804e`, 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](docs/ncp1117dtarkg-datasheet.pdf)

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