SY8291ABC

@@ -0,0 +1,45 @@+# SY8291ABC++**Silergy Corp** · DC-DC Converters · SOT-23-6++SY8291ABC from Silergy Corp, in a SOT-23-6. 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 | BS | passive | Boot-strap pin. Supplies the high-side gate driver via a bootstrap capacitor. Decouple to LX with a 0.1 µF (100 nF) ceramic cap. BS-to-LX voltage rating 3.6V absolute max (3.3V recommended). |+| 2 | GND | power_in | Device ground return. Also functions as the primary thermal path; maximize copper area for best thermal performance. |+| 3 | FB | input | Output feedback pin. Connect to the center of the R1/R2 resistor divider from VOUT to program the output: VOUT = 0.6 × (1 + R1/R2). Reference is 0.6V ±2%. FB absolute max 3.6V. |+| 4 | EN | input | Enable control input. Pull high to turn on the regulator; do not float. VENH ≈ 1.5V rising, VENL ≈ 0.4V falling. Absolute max EN voltage is VIN + 0.6V. |+| 5 | IN | power_in | Supply input pin. 5V to 40V operating range (42V absolute max). Decouple to GND with at least a 1 µF (4.7 µF recommended) low-ESR ceramic capacitor placed close to the pin. |+| 6 | LX | power_out | Inductor / switch node. Connect to the external inductor and the anode of the freewheeling Schottky diode. Internal N-channel power FET RDS(on) ≈ 180 mΩ; current limit ≈ 2A. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Silergy Corp |+| Package | SOT-23-6 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `SY8291ABCABC`++## CAD (KiCad official)++- Symbol: `SY8291ABC`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Silergy Corp datasheet](docs/sy8291abc-datasheet.pdf) (9 pp, sha256 `e4d186cfba2c4177`, 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/sy8291abc-datasheet.pdf)

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