RT8289GSP

@@ -0,0 +1,48 @@+# RT8289GSP++**Richtek Tech** · DC-DC Converters · SOIC-8-EP++RT8289GSP from Richtek Tech, in a SOIC-8-EP. 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 | BOOT | input | High Side Gate Drive Bootstrap Input. Supplies the drive for the high-side N-MOSFET switch. Connect a 10nF or greater capacitor from SW to BOOT to power the high-side switch. Absolute maximum is (VSW - 0.3V) to (VSW + 6V); typical VBOOT-SW is 4.8V. |+| 2 | NC | unconnected | No Internal Connection. |+| 3 | NC | unconnected | No Internal Connection. |+| 4 | FB | input | Feedback Input. Senses the output voltage through a resistive divider to regulate said voltage; the divider values also set loop bandwidth. Feedback threshold is 1.222V (typ). |+| 5 | EN | input | Chip Enable (Active High). Digital input that turns the regulator on/off. Drive above 1.4V to enable, below 0.4V to disable; leave open for automatic startup (1µA pull-up). Absolute max 6V; recommended 0V-5.5V. |+| 6 | GND | power_in | Ground. Both pin 6 and the exposed pad (pin 9) must be connected to GND; the exposed pad must be soldered to a large PCB copper area for maximum power dissipation. |+| 7 | VIN | power_in | Power Input. Supplies the IC and step-down converter switches. Drive with a 5.5V to 32V source (abs max 34V). Bypass to GND with a suitably large capacitor to eliminate input noise. |+| 8 | SW | power_out | Power Switching Output. Switching node that supplies power to the output; connect the output LC filter from SW to the load. A capacitor from SW to BOOT powers the high-side switch. Absolute max -0.6V to (VIN + 0.3V). |+| 9 | GND | power_in | Exposed Pad (Ground). Must be soldered to a large PCB copper area and connected to GND for maximum power dissipation; θJC = 15°C/W measured at the exposed pad. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Richtek Tech |+| Package | SOIC-8-EP |+| Category | PMIC |+| Pins | 9 |++## Ordering variants++- `RT8289GSPGSP`++## CAD (KiCad official)++- Symbol: `RT8289GSP`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8-EP (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Richtek Tech datasheet](docs/rt8289gsp-datasheet.pdf) (13 pp, sha256 `a08c6019321dbdd5`, 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/rt8289gsp-datasheet.pdf)

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