# XL7056E1

**XLSEMI** · DC-DC Converters · TO-263-7

XL7056E1 from XLSEMI, in a TO-263-7. 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 | GND | power_in | Ground pin. Reference for all internal circuitry. |
| 2 | FB | input | Feedback pin. Senses the output voltage through an external resistor divider network for regulation. Internal reference voltage is 1.25 V. |
| 3 | CSN | input | Current sense negative input. Connects to the low side of the external current-sense resistor for over-current/limit detection. |
| 4 | SW | output | Switch node output pin from the internal high-side power MOSFET. Connects to the external inductor and freewheeling Schottky diode. Also tied to the metal tab of the TO263-7L package. |
| 5 | CSP | input | Current sense positive input. Connects to the high side of the external current-sense resistor for output current limiting. |
| 6 | VC | passive | Internal voltage regulator bypass pin. Requires a 1 uF bypass capacitor between VC and VIN. |
| 7 | VIN | power_in | Power supply input pin. Accepts 8 V to 80 V DC input. A bypass capacitor between VIN and GND is required for noise suppression. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | TO-263-7 |
| Category | PMIC |
| Pins | 7 |

## Ordering variants

Same part, different packaging or reel option.

- `XL7056E1`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 反馈电压 | VFB | 1.225 | 1.25 | 1.275 | V | Vin =20V 至 80V, Vout=15V Iload=0.5A | 5 |
| 输入电压 | Vin |  |  | 80 | V |  | 5 |
| 静态电源电流 | Iq |  | 2.1 | 5 | mA | VFB=2V | 5 |
| 振荡频率 | Fosc | 75 | 100 | 135 | KHz |  | 5 |
| 输入引脚电压 | VIN | -0.3 |  | 100 | V |  | 4 |
| 反馈引脚电压 | VFB | -0.3 |  | 5 | V |  | 4 |
| 输出开关引脚电压 | VSW | -0.3 |  |  | V |  | 4 |
| 最大结温 | TJ | -40 |  | 150 | ºC |  | 4 |
| 操作结温 | TJ | -40 |  | 125 | ºC |  | 4 |
| 贮存温度范围 | TSTG | -65 |  | 150 | ºC |  | 4 |
| 引脚温度(焊接10秒) | TLEAD |  |  | 260 | ºC | 焊接10秒 | 4 |
| ESD (人体模型) | ESD | 3000 |  |  | V |  | 4 |
| 热阻 (TO263-7L) | RJA |  | 30 |  | ºC/W | 结到环境，无外部散热片 | 4 |

## CAD (KiCad official)

- Symbol: `XL7056E1`
- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin8`
- 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files: `xl7056e1-etched.step` / `xl7056e1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl7056e1.step` / `xl7056e1.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`xl7056e1.step`](xl7056e1.step) | 238 KB | You want the bare part, or you mark your own boards. |
| [`xl7056e1-etched.step`](xl7056e1-etched.step) | 1.7 MB | You want the part with `XL7056E1` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 487 faces against 179 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [XLSEMI datasheet](docs/xl7056e1-datasheet.pdf) (11 pp, sha256 `fa827ef1aee9b233`, 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/xl7056e1-datasheet.pdf)