# RY9430DP8

**RYCHIP** · DC-DC Converters · ESOP-8

RY9430DP8 from RYCHIP, in a ESOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BST | passive | Bootstrap pin: a capacitor connected between SW and BST is required to form a floating supply across the high-side switch driver. |
| 2 | VIN | power_in | Power supply pin with a recommended input range of 4.5V to 38V and an absolute maximum VIN voltage of 42V. |
| 3 | SW | output | Switching pin connecting the internal power MOSFETs to the inductor; SW is rated -0.3V to VIN+1V (-5V to VIN+2V for 10ns transients). |
| 4 | GND | power_in | Ground pin for the device, to be connected to a large copper area for thermal performance. |
| 5 | FB | input | Adjustable-version feedback input, connected to the center point of the external resistor divider; FB absolute maximum is 6V. |
| 6 | NC | unconnected | No connection. |
| 7 | EN | input | Enable input: drive logic-high to enable the IC and logic-low to disable it into micro-power shutdown; rising threshold is 1.1V and falling threshold is 0.9V, with an absolute maximum of 42V. |
| 8 | NC | unconnected | No connection. |
| 9 | EPAD | power_in | Exposed thermal pad, internally tied to GND; solder to a large copper area to cool the chip. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RYCHIP |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `RY9430DP8`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `ry9430dp8-etched.step` / `ry9430dp8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ry9430dp8.step` / `ry9430dp8.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [RYCHIP datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918862385721344) (12 pp, sha256 `76294dfcd8ce2d72`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ry9430dp8-datasheet.pdf)