# XL7045E1

**XLSEMI** · DC-DC Converters · ESOP-8

XL7045E1 from XLSEMI, 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 | VIN | power_in | Power input pin; an electrolytic capacitor must be connected in parallel between VIN and GND to suppress noise, with input voltage specified at 10 V to 80 V and an absolute maximum of -0.3 V to 100 V. |
| 2 | SW | output | Power switch output pin and the switching node of the converter, with an absolute maximum voltage of -0.3 V to Vin. |
| 3 | FB | input | Feedback pin that senses the output voltage through an external resistor divider, with a reference voltage of 1.25 V and an absolute maximum voltage of -0.3 V to Vin. |
| 4 | GND | power_in | Ground pin, which is also the potential of the exposed back pad. |
| 5 | CSP | input | Positive current-sense input, with an absolute maximum voltage of -0.3 V to 20 V. |
| 6 | CSN | input | Negative current-sense input, with an absolute maximum voltage of -0.3 V to 20 V. |
| 7 | NC | unconnected | No connection. |
| 8 | NC | unconnected | No connection. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `XL7045E1`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `xl7045e1-etched.step` / `xl7045e1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl7045e1.step` / `xl7045e1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XLSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834701989965824) (10 pp, sha256 `7a9790a04aab75cf`, retrieved 2026-10-09, 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/xl7045e1-datasheet.pdf)