component
XL4201E1
Public Unreviewedby Ray
XLSEMI DC-DC Converters, SOIC-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.
README
markdownXL4201E1
XLSEMI · DC-DC Converters · SOIC-8-EP
XL4201E1 from XLSEMI, in a SOIC-8-EP. 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 | NC | unconnected | Not connected. Leave floating or tie as needed; no internal function. |
| 2 | SW | power_out | Power Switch Output Pin. Output is the switch node that supplies power to the output inductor. The back exposed PAD must be connected to SW. |
| 3 | GND | power_in | Ground pin. Return for the internal control circuitry and reference. |
| 4 | FB | input | Feedback pin. Through an external resistor divider network, feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.25V (typ). |
| 5 | CS | input | Output current sense pin. Constant load current is set by Iload = 0.11V / Rcs (Vcs typ 110mV, 104.5-115.5mV). |
| 6 | NC | unconnected | Not connected. Leave floating or tie as needed; no internal function. |
| 7 | VC | passive | Internal voltage regulator bypass capacitor pin. Connect a 1uF capacitor from VC to VIN. |
| 8 | VIN | power_in | Supply voltage input pin. XL4201 operates from 8V to 40V DC. Bypass VIN to GND with a suitably large capacitor (e.g. 100uF/50V) to eliminate input noise. Absolute maximum 45V; UVLO ~5V; OVP ~45V. |
| EP | SW (Exposed PAD) | power_out | Back exposed thermal pad. Electrically the SW switch node and must be tied to pin 2 (SW). Provides the primary thermal path for the internal power MOSFET. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XLSEMI |
| Package | SOIC-8-EP |
| Category | PMIC |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
XL4201E1
CAD (KiCad official)
- Symbol:
XL4201E1 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOIC-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XLSEMI datasheet (14 pp, sha256
3f07df403bac8266, 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).