AP1509-12M

@@ -0,0 +1,50 @@+# AP1509-12M++**HGSEMI** · DC-DC Converters · SOP-8++AP1509-12M from HGSEMI, in a SOP-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. Operates from 4.5V to 42V DC. Bypass VIN to GND with a suitably large capacitor to eliminate input noise. |+| 2 | OUTPUT | output | Power Switch Output Pin (SW). Switch node that supplies power to the external inductor/Schottky-diode/output-capacitor network. Rated to source up to 2A. |+| 3 | FEEDBACK | input | Feedback Pin (FB). Senses the output voltage through an external resistor divider and regulates it. Internal feedback threshold voltage is 1.23V (fixed 12V version internally sets divider for 12V output). |+| 4 | ON/OFF | input | Enable Pin. Drive ON/OFF low (<0.8V) to turn on the device; drive high (>1.4V) to turn it off. Floating defaults low (regulator ON). Input leakage 0.2-10 uA (ON), 5-30 uA (OFF). |+| 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 AP1509. |+| 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 AP1509. |+| 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 AP1509. |+| 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 AP1509. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HGSEMI |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `AP1509-12M/TR`+- `AP1509-12ME/TR`++## CAD (KiCad official)++- Symbol: `AP1509-12M`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HGSEMI datasheet](docs/ap1509-12m-datasheet.pdf) (13 pp, sha256 `8479d2479ebaa956`, 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/ap1509-12m-datasheet.pdf)

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