TX4151 from XDS, in a SOP-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	VIN	power_in	Chip supply voltage input. Operating range +8V to +30V (absolute max +34V). Bypass with a low-ESR ceramic capacitor (typ. 10μF) placed close to the pin.
2	COMP	bidirectional	Loop compensation pin. External R-C network to GND sets the PWM/error-amplifier compensation. Absolute max +3V.
3	GND	power_in	Device ground reference.
4	FB	input	Output voltage feedback input. Regulated to internal reference VFB = 0.835V (0.815-0.855V). VOUT = (1 + R3/R4) × 0.835V. Absolute max +3V.
5	CS-	input	Negative terminal of the current-sense input. External sense resistor is connected between CS+ and CS- to set the output current limit; ILIMIT = 75mV / Rsense. Common-mode range -0.6V to +6V.
6	CS+	input	Positive terminal of the current-sense input. Together with CS- senses the voltage across the external current-limit resistor (VOFFS typ. 75mV). Common-mode range -0.6V to +6V.
7	CHRG	output	Open-drain charge-status indicator output. Sinks up to IOUT ≈ 1.5mA; absolute max pin voltage +10V. Typically pulled up through an LED or resistor to indicate charging state.
8	SW	output	Switch node. Drain of the internal 100mΩ PMOS power switch; connects to the external inductor and freewheeling Schottky diode. Voltage range -1V to +34V.
EP	Exposed PAD	output	Exposed thermal pad on package underside. Datasheet specifies it is connected to the switch node (SW); leave floating or tie to SW plane - do NOT connect to GND. Improves thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	XDS
Package	SOP-8
Category	PMIC
Pins	9

CAD (KiCad official)

Symbol: TX4151
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tx4151.step`	122 KB	You want the bare part, or you mark your own boards.
`tx4151-etched.step`	1.1 MB	You want the part with `TX4151` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 306 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 (10 pp, sha256 0be198588bad936b, retrieved 2026-08-17, tier: lcsc)
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