# DK5V45R05SL

**Shenzhen DongKe Semicon** · Synchronous Rectifier Controllers · TO-252

DK5V45R05SL from Shenzhen DongKe Semicon, in a TO-252. 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 | NC | unconnected | Not connected (悬空); the datasheet states this pin is left floating. |
| 2 | K | passive | Used as the diode cathode in the application; the chip senses the K-point voltage in real time to determine operating mode, and the working voltage must stay below the 45 V NMOS drain-source breakdown rating. |
| 3 | A | passive | Used as the diode anode in the application; all datasheet voltages are referenced to this point, and the internal NMOS turns on when the forward voltage across A and K exceeds VON of -200 mV. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen DongKe Semicon |
| Package | TO-252 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| NMOS 源漏耐压 | V(BR)DSS |  |  | 45 | V |  | 3 |
| NMOS 最大连续电流 | IDSCDC |  |  | 60 | A |  | 3 |
| NMOS 最大峰值电流 | IDSPDC |  |  | 200 | A |  | 3 |
| TO252 耗散功率 | PDMAX |  |  | 110 | W |  | 3 |
| 储存温度范围 | TSTG | -55 |  | 155 | ℃ |  | 3 |
| 结工作温度范围 | TJ | -40 |  | 150 | ℃ |  | 3 |
| ESD(HBM) |  | -4000 |  | 4000 | V |  | 3 |
| ESD(MM) |  | -350 |  | 350 | V |  | 3 |
| 焊接温度 |  |  |  | 260 | ℃ | 5S | 3 |
| 热阻（结到环境） | RθJA |  |  | 90 | ℃/W |  | 3 |
| 热阻（结到管壳） | RθJC |  |  | 1.3 | ℃/W |  | 3 |
| 芯片启动电压 | VCC_ON |  |  | 5.5 | V | TA = 25℃; 电压以 A 点为参考点 | 3 |
| 欠压保护阈值 | VCC_OFF |  |  | 3.3 | V | TA = 25℃; 电压以 A 点为参考点 | 3 |
| 过压保护阈值 | VOVP |  |  | 10 | V | TA = 25℃; 电压以 A 点为参考点 | 3 |
| NMOS 开通电压 | VON |  |  | -200 | mV | TA = 25℃ | 3 |
| NMOS 预关断电压 | VOFF1 |  |  | -40 | mV | TA = 25℃ | 3 |
| NMOS 关断电压 | VOFF2 |  |  | 0 | mV | TA = 25℃ | 3 |
| NMOS 开通延时 | TDON |  |  | 150 | ns | TA = 25℃ | 3 |
| NMOS 关断延时 | TDOFF |  |  | 30 | ns | TA = 25℃ | 3 |
| NMOS 最大开通时间 | TON_MAX |  |  | 20 | μs | TA = 25℃ | 3 |
| 最大工作频率 | FS_MAX |  |  | 150 | KHz | TA = 25℃ | 3 |
| NMOS 导通电阻 | RDS_ON |  |  | 5 | mΩ | TA = 25℃ | 3 |

## CAD (KiCad official)

- Symbol: `DK5V45R05SL`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `dk5v45r05sl-etched.step` / `dk5v45r05sl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dk5v45r05sl.step` / `dk5v45r05sl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen DongKe Semicon datasheet](docs/dk5v45r05sl-datasheet.pdf) (8 pp, sha256 `ad764aec2eefb9b5`, retrieved 2026-10-29, 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:** 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/dk5v45r05sl-datasheet.pdf)