# XL4005E1

**XLSEMI** · DC-DC Converters · TO-263-5

XL4005E1 from XLSEMI, in a TO-263-5. 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. Should be placed outside the Schottky diode-to-output-capacitor ground path to prevent switching current spikes from inducing voltage noise into the XL4005. |
| 2 | FB | input | Feedback pin. Senses the output voltage through an external resistor divider network and regulates it. Feedback threshold voltage is 0.8V. |
| 3 | SW | output | Power switch output pin. Switch node connected to the internal power MOSFET (25 mΩ) that supplies power to the output inductor. Also connected to the exposed metal tab of the TO263-5L package. |
| 4 | EN | input | Enable pin. Drive high (>1.4V) to turn the device on; drive low (<0.8V) to turn it off. TTL-compatible with hysteresis. |
| 5 | VIN | power_in | Supply voltage input pin. Operates from 5V to 32V DC (absolute max 35V). Bypass VIN to GND with a suitably large capacitor (e.g. 220µF/50V) to eliminate input noise. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | TO-263-5 |
| Category | PMIC |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `XL4005E1`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 0.776 | 0.8 | 0.824 | V | Vin = 5V to 32V, Vout=5V, Iload=0.5A to 5A | 5 |
| Input operation voltage | Vin | 5 |  | 32 | V |  | 5 |
| Shutdown Supply Current | IS |  | 60 | 200 | uA | VEN=0V | 5 |
| Quiescent Supply Current | Iq |  | 3 | 5 | mA | VEN =2V, VFB =Vin | 5 |
| Oscillator Frequency | Fosc | 240 | 300 | 360 | Khz |  | 5 |
| EN Pin Threshold High (Regulator ON) | VEN | 1.4 |  |  | V | High (Regulator ON) | 5 |
| EN Pin Threshold Low (Regulator OFF) | VEN |  |  | 0.8 | V | Low (Regulator OFF) | 5 |
| EN Pin Input Leakage Current (ON) | IH |  | 1 | 15 | uA | VEN =2V (ON) | 5 |
| EN Pin Input Leakage Current (OFF) | IL |  | 1 | 15 | uA | VEN =0V (OFF) | 5 |
| Input Voltage (absolute maximum) | Vin | -0.3 |  | 35 | V |  | 4 |
| Feedback Pin Voltage | VFB | -0.3 |  |  | V |  | 4 |
| EN Pin Voltage | VEN | -0.3 |  |  | V |  | 4 |
| Output Switch Pin Voltage | VSW | -0.3 |  |  | V |  | 4 |
| Thermal Resistance (TO263-5L) Junction to Ambient | RJA |  | 30 |  | oC/W | Junction to Ambient, No Heatsink, Free Air | 4 |
| Operating Junction Temperature | TJ | -40 |  | 125 | oC |  | 4 |
| Storage Temperature | TSTG | -65 |  | 150 | oC |  | 4 |
| Lead Temperature (Soldering) | TLEAD |  |  | 260 | oC | Soldering, 10 sec | 4 |
| ESD (HBM) |  |  |  | 2000 | V | HBM | 4 |

## CAD (KiCad official)

- Symbol: `XL4005E1`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `xl4005e1-etched.step` / `xl4005e1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl4005e1.step` / `xl4005e1.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`xl4005e1.step`](xl4005e1.step) | 180 KB | You want the bare part, or you mark your own boards. |
| [`xl4005e1-etched.step`](xl4005e1-etched.step) | 1.6 MB | You want the part with `XL4005E1` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 448 faces against 135 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/xl4005e1-datasheet.pdf) (10 pp, sha256 `dccfa80a42b888ff`, 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/xl4005e1-datasheet.pdf)