# XL9505

**XLSEMI** · LED Drivers · TO-263-5L

XL9505 from XLSEMI, in a TO-263-5L. 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 | GND | power_in | Ground pin, the return reference for the device. |
| 2 | CS | input | Output current sense pin with a 0.23V CS reference voltage, and the absolute maximum CS voltage is -0.3 to 7 V. |
| 3 | SW | output | Power switch output pin that forms the switching node of the output power stage, with absolute maximum VSW of -0.3 to VIN V. |
| 4 | VC | power_out | Internal voltage regulator bypass pin that requires a 1uF capacitor between VIN and VC, with absolute maximum VC of -0.3 to VIN V. |
| 5 | VIN | power_in | Supply input pin for the 5V to 45V operating range, which requires a parallel capacitor between VIN and GND to suppress noise, with absolute maximum VIN of -0.3 to 50 V. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | TO-263-5L |
| Category | LED Drivers |
| Pins | 6 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 5 |  | 45 | V |  | 4 |
| CS voltage | VCS | 220.8 | 230 | 239.2 | mV | VIN =12V, VOUT =3.3V, IOUT =0.3A | 4 |
| Oscillator frequency | FOSC | 160 | 200 | 240 | KHz |  | 4 |
| Quiescent supply current | IQ |  | 2.5 | 5 | mA | VCS=2V | 4 |
| Maximum duty cycle | DMAX |  |  | 100 | % | VCS=0V | 4 |
| Switch current limit | IL |  | 5.4 |  | A |  | 4 |
| Input undervoltage lockout | VIN_UVLO |  | 4.5 |  | V |  | 4 |
| High-side on-resistance | RDS(ON)H |  | 38 |  | mΩ |  | 4 |
| Low-side on-resistance | RDS(ON)L |  | 50 |  | mΩ |  | 4 |
| Thermal shutdown temperature | TSD |  | 145 |  | ℃ |  | 4 |
| Thermal shutdown hysteresis | TD |  | 40 |  | ℃ |  | 4 |
| Input voltage range (absolute maximum) | VIN | -0.3 |  | 50 | V |  | 3 |
| Internal regulator bypass pin voltage (VC) | VC | -0.3 |  |  | V | Up to VIN | 3 |
| Switch pin voltage | VSW | -0.3 |  |  | V | Up to VIN | 3 |
| Current sense pin voltage | VCS | -0.3 |  | 7 | V |  | 3 |
| ESD human body model |  | 2500 |  |  | V | Human body model; printed as >2500 | 3 |
| Operating junction temperature | TJ | -40 |  | 150 | ℃ |  | 3 |
| Storage temperature range | TSTG | -65 |  | 150 | ℃ |  | 3 |
| Lead temperature (soldering 10 s) | TLEAD |  |  | 260 | ℃ | Soldering 10 seconds | 3 |
| Thermal resistance junction to ambient (TO263-5L) | RJA |  | 30 |  | ℃/W | Junction to ambient, no external heatsink | 3 |

## CAD (KiCad official)

- Symbol: `XL9505`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5L (KiCad packages3D, STEP)
- 3D model files: `xl9505-etched.step` / `xl9505-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xl9505.step` / `xl9505.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XLSEMI datasheet](docs/xl9505-datasheet.pdf) (15 pp, sha256 `e32d260397d33078`, retrieved 2026-10-27, tier: manufacturer)
- **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/xl9505-datasheet.pdf)