TX6301 from XDS, in a SOIC-8. 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	TOFF	passive	Switching-frequency setting pin. An external capacitor connected to this pin sets the switching (off-time) frequency; recommended operating frequency is below 500 kHz.
2	VDD	power_in	Chip supply rail, internally clamped by a shunt regulator to typically 5.5 V. Fed from VIN through an external series resistor (RVDD); the internal Zener clamp current must be kept below 10 mA. UVLO turn-on at 3.2 V rising, turn-off at 2.7 V falling.
3	GND	power_in	Device ground reference for all internal circuitry and the sensing amplifiers.
4	EN	input	Chip enable; active-high. Logic high (>= 0.4 x VDD) enables the controller, logic low (<= 0.8 V) puts the part into standby (I_INQ ~200 uA). May be driven with a PWM signal for LED dimming.
5	COMP	passive	Loop / frequency compensation node for the internal error amplifier. Connect an external capacitor (typically 200 pF to 1 nF) to GND; larger values reduce loop bandwidth.
6	CS	input	Output LED current sense input. The regulation loop holds this pin at a nominal 250 mV (240-260 mV) across the sense resistor RCS, so ILED = 0.25 V / RCS.
7	DRV	output	Gate-drive output for the external power MOSFET. Nominal drive swing tracks VDD (~5.5 V); rise/fall times ~50 ns into 1 nF. Choose a MOSFET whose RDS(on) is fully enhanced at VGS = 5.5 V.
8	ILIM	input	Power-MOSFET peak-current limit sense input. Sets the cycle-by-cycle inductor peak-current limit via an external sense resistor RILIM, where ILIMIT = 0.25 V / RILIM.

Key specifications

Parameter	Value
Manufacturer	XDS
Package	SOIC-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: TX6301
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tx6301.step`	122 KB	You want the bare part, or you mark your own boards.
`tx6301-etched.step`	1.5 MB	You want the part with `TX6301` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 372 faces against 147 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 (8 pp, sha256 aade119490c082a5, 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