TX6141 from XDS, in a SOT-89-5. 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	SW	output	Switch node - drain of the internal power NMOS. Connects to the inductor and the freewheeling Schottky diode. Rated 1.2A max; RDS(on) typ 450 mΩ (VIN=6V-30V).
2	VSS	power_in	Chip ground / device return.
3	DIM	input	Brightness/dimming control input. Accepts PWM up to 20 kHz or analog voltage (0.5-2.5V) for linear dimming. VIH ≥ 2.5V, VIL ≤ 0.3V; internally pulled up (~500 kΩ) to ~5V so pin floats to enabled. VDIM < 0.3V disables output and enters standby. Absolute max 6V. Leave floating if dimming unused.
4	CS	input	Current-sense input. Connects to the low side of the external sense resistor RCS between VIN and CS. Internal comparator regulates (VIN-VCS) hysteretically between 80 mV (VCSL) and 120 mV (VCSH), giving ILED ≈ 0.1V / RCS. Input current typ 10 µA.
5	VIN	power_in	Supply input, 5.5V-30V operating (35V absolute max). UVLO rising ≈ 5.1V with 0.4V hysteresis; standby current ≈ 320 µA. Bypass with 22-47 µF to VSS.

Key specifications

Parameter	Value
Manufacturer	XDS
Package	SOT-89-5
Category	LED-drv
Pins	5

CAD (KiCad official)

Symbol: TX6141
Footprint: Package_TO_SOT_SMD:SOT-89-5
3D model: SOT-89-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tx6141.step`	86 KB	You want the bare part, or you mark your own boards.
`tx6141-etched.step`	776 KB	You want the part with `TX6141` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 208 faces against 26 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: XDS datasheet (9 pp, sha256 10fbde951924fecc, retrieved 2026-08-17, 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: 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