AP1538SG-13

@@ -0,0 +1,48 @@+# AP1538SG-13++**Diodes Incorporated** · DC-DC Converters · SOIC-8++AP1538SG-13 from Diodes Incorporated, 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 | FB | input | Feedback pin. Connect to the resistor divider from VOUT to set the regulated output voltage using VOUT = VFB x (1 + RA/RB), with VFB typically 0.8V. |+| 2 | EN | input | Enable (power-off) pin. Drive High (>=2.0V) for normal step-down operation; drive Low (<=0.8V) to stop step-down operation and deactivate all internal circuits. |+| 3 | OCSET | input | Over-current set pin. Connect an external resistor (typically ~3kΩ) to set the maximum output current limit; internal bias current ~90µA. |+| 4 | VCC | power_in | IC power supply input. Operating range 3.6V to 18V; bypass locally with a decoupling capacitor (0.1µF typ) plus bulk input cap (e.g. 470µF). |+| 5 | Output | output | Switch node output (drain of the internal P-channel power MOSFET). Connect the external inductor and freewheel Schottky diode here; minimize trace area to reduce EMI. Pin 5 is tied internally to pin 6. |+| 6 | Output | output | Switch node output (drain of the internal P-channel power MOSFET). Connect the external inductor and freewheel Schottky diode here; minimize trace area to reduce EMI. Pin 6 is tied internally to pin 5. |+| 7 | Vss | power_in | Ground return. Pin 7 is tied internally to pin 8 and should be connected to the system ground plane. |+| 8 | Vss | power_in | Ground return. Pin 8 is tied internally to pin 7 and should be connected to the system ground plane. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `AP1538SG-13SG-13`+- `AP1538SG-13SDPG-13`++## CAD (KiCad official)++- Symbol: `AP1538SG-13`+- 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:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AP1538SG-13.pdf) (12 pp, sha256 `638a3ccf88cbfdca`, 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/ap1538sg-13-datasheet.pdf)

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