TPS54335ADDAR from Texas Instruments, in a SOP-8-EP-150mil. 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	BOOT	output	Bootstrap capacitor node for the high-side MOSFET gate driver. A bootstrap capacitor is required between BOOT and PH. If the BOOT-PH voltage falls below the BOOT-PH UVLO (~2.1-3 V), switching is inhibited until the capacitor is refreshed.
2	VIN	power_in	Supply input voltage, 4.5 V to 28 V (30 V abs max). Bypass with a low-ESR ceramic capacitor placed close to the VIN and GND pins.
3	PH	output	Switch node (source of the internal high-side power MOSFET / drain of the low-side MOSFET). Connect to the output inductor and to the low side of the bootstrap capacitor. Rated -1 V to 30 V (-3.5 V for 10 ns transients).
4	GND	power_in	Device ground. Must be tied to the exposed PowerPAD for proper operation and thermal performance.
5	VSENSE	input	Inverting input of the transconductance (gm) error amplifier. Connect to the feedback resistor divider from VOUT; the internal reference is 0.8 V (±0.8%).
6	COMP	output	Error-amplifier output and input to the output switch current comparator. Connect frequency-compensation network (R-C, optional C) to GND to set loop response.
7	EN	input	Enable input. Float to enable (internal pull-up). Enable threshold typ 1.21 V rising / 1.17 V falling. Can be driven by a resistor divider from VIN to program a precision input UVLO.
8	RT	input	Switching-frequency programming pin. Connect an external resistor from RT to GND to set the switching frequency (50 kHz to 1.5 MHz; e.g. ~480 kHz with 100 kΩ).
PAD	PowerPAD	power_in	Exposed thermal pad on the underside of the package. Must be soldered to the PCB and connected to GND (pin 4) with multiple thermal vias to a ground plane for correct operation and thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOP-8-EP-150mil
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

TPS54335ADDAR
TPS54335ADDARDRC
TPS54335ADDARDRCR
TPS54335ADDARDRCT
TPS54335ADDARDDA (TPS54336A)

CAD (KiCad official)

Symbol: TPS54335ADDAR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8-EP-150mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tps54335addar.step`	122 KB	You want the bare part, or you mark your own boards.
`tps54335addar-etched.step`	2.7 MB	You want the part with `TPS54335ADDAR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 659 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: Texas Instruments datasheet (52 pp, sha256 35ab1bac1ea6973b, retrieved 2026-08-17, 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: 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