TP4333 from TPOWER, 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	OUT	power_out	Boost output positive terminal and output-voltage sense input. Delivers regulated 5V (4.8-5.2V) at up to 1A to the USB load; requires low-ESR ceramic bulk cap (typ. 10uF x2) close to the pin.
2	BAT	bidirectional	Li-ion battery positive terminal. Charge current is delivered here in charge mode (0.8A CC, 100mA trickle) and battery energy is drawn from here in boost/discharge mode. Discharge cut-off 2.85V, low-battery warning 3.0V, boost start-up 3.2V.
3	SW	power_out	Drain of the internal boost-converter power NMOS (switch node). Connect the 1.5uH boost inductor between BAT and SW; inductor saturation current must exceed 3A. Boost switching frequency 0.7-1.3 MHz (typ. 1 MHz).
4	GND	power_in	Chip ground reference. Connect to a large-area ground pour; return currents for both the boost inductor and output cap should terminate at this pin.
5	SWT	bidirectional	Combined push-button input and torch-LED driver. Short-press displays battery capacity via LEDs; long-press 2s toggles the flashlight LED (max drive current 50mA). Add a 100k pull-up from BAT to SWT if the LED leakage below 1.5V exceeds 1uA.
6	VDD	power_in	Charging power input. Recommended operating range 4.5-5.5V (absolute 4.3-5.5V); accepts 5V USB source. Undervoltage lockout at VDD-VBAT = 180mV rising / 80mV falling.
7	LED2	output	Discharge-indicator LED driver (open-drain sink, ~2mA at BAT=4V). Solid ON during normal discharge; blinks at 1Hz as a low-battery warning when VBAT falls below 3.0V.
8	LED1	output	Charge-indicator LED driver (open-drain sink, ~2mA at BAT=4V). Blinks at 1Hz during charging and turns solid ON when the battery is fully charged.

Key specifications

Parameter	Value
Manufacturer	TPOWER
Package	SOP-8
Category	PMIC
Pins	8

CAD (KiCad official)

Symbol: TP4333
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
`tp4333.step`	122 KB	You want the bare part, or you mark your own boards.
`tp4333-etched.step`	1.6 MB	You want the part with `TP4333` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 401 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: TPOWER datasheet (5 pp, sha256 c1bdff562f25c898, 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