SY8120B1ABC

@@ -0,0 +1,45 @@+# SY8120B1ABC++**Silergy Corp** · DC-DC Converters · SOT-23-6++SY8120B1ABC 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 ceramic capacitor. Absolute maximum BS-LX voltage is 4 V. |+| 2 | GND | power_in | Device ground. Also serves as the thermal case reference (θJC measured at this pin). Connect to a large PCB copper plane for best thermal and noise performance. |+| 3 | FB | input | Output feedback pin. Connect to the center point of the external resistor divider to program VOUT via Vout = 0.6 × (1 + R1/R2). Internal reference is 0.6 V ±2%; FB input current is ±50 nA max. |+| 4 | EN | input | Enable control input. Pull high (≥1.5 V) to turn the regulator on, pull below 0.4 V to shut down. Do not float; absolute maximum is VIN + 0.3 V. Consider a 1 MΩ pull-down to GND if driven from a high-impedance source. |+| 5 | IN | power_in | Input supply pin. Operates from 4.5 V to 18 V (19 V absolute maximum). Decouple to GND with at least a 1 µF (4.7 µF recommended) low-ESR X5R ceramic capacitor placed close to the pin. |+| 6 | LX | power_out | Switching node. Connect to the external output inductor. Internal top FET RDS(on) 130 mΩ, bottom FET 120 mΩ; peak current limit 3.6 A, valley current limit 2 A. Minimize PCB copper area on this net to reduce EMI. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Silergy Corp |+| Package | SOT-23-6 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `SY8120B1ABCABC`++## CAD (KiCad official)++- Symbol: `SY8120B1ABC`+- 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/sy8120b1abc-datasheet.pdf) (10 pp, sha256 `4d5e03637d5e3991`, 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/sy8120b1abc-datasheet.pdf)

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