# DK5V45R20P

**Shenzhen DongKe Semicon** · Synchronous Rectifier Controllers · SOP-8

DK5V45R20P from Shenzhen DongKe Semicon, in a SOP-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 | A | passive | Anode terminal, equivalent to the anode of a rectifier diode in application. Internally tied to the source of the integrated 45V NMOS and used as the voltage reference point for all datasheet specs. Pins 1, 2, 3 are internally connected. |
| 2 | A | passive | Anode terminal (paralleled with pins 1 and 3). Connects to the source of the internal 45V/20mΩ NMOS rectifier. |
| 3 | A | passive | Anode terminal (paralleled with pins 1 and 2). Connects to the source of the internal 45V/20mΩ NMOS rectifier. |
| 4 | VCC | power_in | Chip supply pin. Startup threshold VCC_ON = 3.6V typ, UVLO VCC_OFF = 3.1V typ, normal operating range 5-6V. In 5V low-side applications VCC is tied directly to the output positive rail, so no external supply components are required. |
| 5 | K | passive | Cathode terminal, equivalent to the cathode of a rectifier diode. Internally tied to the drain of the 45V/20mΩ NMOS. Pins 5, 6, 7, 8 are internally connected and typically paralleled for current handling and heat dissipation. |
| 6 | K | passive | Cathode terminal (paralleled with pins 5, 7, 8). Connects to the drain of the internal 45V/20mΩ NMOS rectifier. |
| 7 | K | passive | Cathode terminal (paralleled with pins 5, 6, 8). Connects to the drain of the internal 45V/20mΩ NMOS rectifier. |
| 8 | K | passive | Cathode terminal (paralleled with pins 5, 6, 7). Connects to the drain of the internal 45V/20mΩ NMOS rectifier. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen DongKe Semicon |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `DK5V45R20P`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `dk5v45r20p-etched.step` / `dk5v45r20p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dk5v45r20p.step` / `dk5v45r20p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen DongKe Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588914793289273344) (6 pp, sha256 `35b68995a142cde4`, retrieved 2026-08-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/dk5v45r20p-datasheet.pdf)