TP73333PDQNR from TECH PUBLIC, in a XDFN-4-EP(1x1). 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	VOUT	power_out	Regulated output. Fixed 3.3V (TP73333) at up to 300mA. Requires a ≥1µF ceramic (X5R) output capacitor to GND for stability. Active discharge pulls this pin down (~80Ω) when EN=0.
2	GND	power_in	Device ground reference. Connect to system ground plane; carries quiescent current (~15µA) plus load return.
3	EN	input	Enable input, active high, must NOT be left floating. VIH ≥ 0.9V (max), VIL ≤ 0.4V (min) at VIN=5V. Drive low (0V) to shut down (Iq ≤ 0.5µA) and engage output active discharge. IEN ≤ 0.1µA at VEN=5.5V.
4	VIN	power_in	Unregulated supply input, 1.4V to 5.5V operating (absolute max 6.5V to GND). Bypass with a 1µF ceramic (X5R) capacitor to GND close to the pin. Dropout is typically 0.15V at 300mA when VOUT ≥ 3V.
5	GND (exposed pad)	power_in	Center exposed die-attach/thermal pad. Shown as pin 5 (GND) in the DFN-4L 1x1 pin configuration drawing. Must be soldered to the PCB GND plane for proper thermal dissipation and grounding.

Key specifications

Parameter	Value
Manufacturer	TECH PUBLIC
Package	XDFN-4-EP(1x1)
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

TP73333PDQNR

CAD (KiCad official)

Symbol: TP73333PDQNR
Footprint: Package_DFN_QFN:OnSemi_XDFN4-1EP_1.0x1.0mm_EP0.52x0.52mm
3D model: XDFN-4-EP(1x1) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: TECH PUBLIC datasheet (10 pp, sha256 9a2de25d8817341f, 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