FP6381AS5CTR

@@ -0,0 +1,46 @@+# FP6381AS5CTR++**Fitipower Integrated Tech** · DC-DC Converters · SOT-23-5++FP6381AS5CTR from Fitipower Integrated Tech, in a SOT-23-5. 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 | EN | input | Enable control pin. Pull high (VIH >= 1.5V) to turn the IC on, pull low (VIL <= 0.4V) to disable. Must not be left floating. |+| 2 | GND | power_in | Ground pin. Power return for the internal N-channel low-side MOSFET and control circuitry. |+| 3 | LX | output | Power switching output node. Connect the external inductor between LX and the output filter capacitor. Rated to VIN+0.3V max. Internal 100Ω discharge resistance when disabled. |+| 4 | VIN | power_in | Power supply input pin, 2.5V to 6V operating range (6.5V absolute max). Place input decoupling capacitor (e.g. 4.7µF MLCC) as close as possible from VIN to GND to minimize noise. |+| 5 | FB | input | Voltage feedback input pin. Connect FB to VOUT through a resistive divider; the internal error amplifier regulates FB to VREF = 0.6V (typ, 0.588V-0.612V). Input leakage <= 1µA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Fitipower Integrated Tech |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `FP6381AS5CTRS5CTR`+- `FP6381AS5CTRS6CTR`+- `FP6381AS5CTRS8CTR`++## CAD (KiCad official)++- Symbol: `FP6381AS5CTR`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Fitipower Integrated Tech datasheet](docs/fp6381as5ctr-datasheet.pdf) (15 pp, sha256 `4b3207bd5495340b`, 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](docs/fp6381as5ctr-datasheet.pdf)

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