XL1509-5.0E1

@@ -0,0 +1,47 @@+# XL1509-5.0E1++**XLSEMI** · DC-DC Converters · SOIC-8++XL1509-5.0E1 from XLSEMI, in a SOIC-8. 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 | VIN | power_in | Supply Voltage Input Pin. XL1509 operates from a 4.5V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. |+| 2 | OUTPUT | output | Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. Connects to the external inductor and Schottky diode of the buck converter. |+| 3 | FEEDBACK | input | Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.23V. |+| 4 | ON/OFF | input | Enable Pin. Drive ON/OFF pin low to turn on the device, drive it high to turn it off. Floating is default low. Threshold approximately 1.4V (OFF) / 0.8V (ON). |+| 5 | GND | power_in | Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. |+| 6 | GND | power_in | Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. |+| 7 | GND | power_in | Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. |+| 8 | GND | power_in | Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | XLSEMI |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `XL1509-5.0E1`++## CAD (KiCad official)++- Symbol: `XL1509-5.0E1`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [XLSEMI datasheet](https://datasheet.lcsc.com/datasheet/pdf/6764d4cba2504b189b593202c77b9bd6.pdf) (13 pp, sha256 `8b10b01cdcb05276`, 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/xl1509-5-0e1-datasheet.pdf)

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