AP63203QWU-7 from Diodes Incorporated, in a TSOT-23-6. 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	FB	input	Feedback sensing terminal for the output voltage. For the AP63203Q the output is internally fixed at 3.3V; connect this pin to the output rail (see Setting the Output Voltage). Internal reference is 0.8V for adjustable variants.
2	EN	input	Enable digital input that turns the regulator on or off. Drive EN high to enable, low to disable. Can be tied to VIN or left floating for automatic startup. Precision threshold of 1.18V allows adjusting the UVLO via a resistor divider.
3	VIN	power_in	Power input supply for the IC and the internal step-down converter power MOSFETs. Operating range 3.8V to 32V (absolute max 35V DC, 40V for 400ms). Bypass VIN to GND with a suitably large ceramic input capacitor close to the pin.
4	GND	power_in	Power ground return for the IC and the low-side MOSFET. Connect to the system ground plane with a low-impedance path.
5	SW	output	Power switching node output. Internal high-side and low-side MOSFETs alternately drive this pin between VIN and GND. Connect the output LC filter (inductor + output capacitor) from SW to produce the regulated output.
6	BST	power_in	High-side gate drive bootstrap input. Connect a 100nF ceramic capacitor from BST to SW to develop the boosted rail that drives the high-side N-channel power MOSFET gate.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	TSOT-23-6
Category	PMIC
Pins	6

Ordering variants

AP63203QWU-7

CAD (KiCad official)

Symbol: AP63203QWU-7
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: TSOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (30 pp, sha256 d7870fb4ed922ae3, retrieved 2026-08-17, tier: manufacturer)
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