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LPW5209B5F-21
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LOWPOWER AC-DC Controllers and Regulators, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+47@@ -0,0 +1,47 @@+# LPW5209B5F-21++**LOWPOWER** · AC-DC Controllers and Regulators · SOT-23-5++LPW5209B5F-21 from LOWPOWER, 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 | VOUT | power_out | Switched power output pin; source of the internal high-side N-MOSFET. Delivers input voltage to the load with 80mΩ typical RDS(ON) and 2.1A current limit. Requires an output bypass capacitor to ground. |+| 2 | GND | power_in | Ground reference for the device. |+| 3 | NC | unconnected | No connect. On the fixed-current-limit LPW5209-21/11/06 variants, pin 3 is not internally connected (the ISET function is only present on the adjustable LPW5209A variant). |+| 4 | EN | input | Active-high device enable input. VEN ≥ 1.4V turns the switch on; VEN ≤ 0.4V disables the switch (shutdown current 0.1µA typ). Must not be left floating and must not go negative with respect to GND; may be tied to VIN to keep the switch always on. |+| 5 | VIN | power_in | Input supply pin, 2.5V to 6V (7V absolute max). Powers the internal circuitry and drain of the internal N-MOSFET switch. Bypass with an input capacitor close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | LOWPOWER |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `LPW5209B5F-21B5F-21`+- `LPW5209B5F-21B5F-11`+- `LPW5209B5F-21B5F-06`+- `LPW5209B5F-21AB5F`++## CAD (KiCad official)++- Symbol: `LPW5209B5F-21`+- 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:** [LOWPOWER datasheet](docs/lpw5209b5f-21-datasheet.pdf) (7 pp, sha256 `a4d2b61137b282f3`, 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/lpw5209b5f-21-datasheet.pdf)
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