QX2303E36F from QX Micro Devices, in a SOT-23-5. 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	NC	unconnected	No connect. Leave floating (do not tie to any net).
2	VOUT	power_in	Feedback / supply-sense pin. Connect to the boosted output rail; the chip internally divides this and regulates against the 1.24V bandgap reference. Absolute-max 7 V. Datasheet labels the pin type as '输入' (input) because the chip senses V_OUT here rather than sourcing it.
3	EN	input	Chip enable, active high. V_IH ≥ 0.4·V_OUT, V_IL ≤ 0.2 V. Pulling EN low puts the chip in standby (I_INQ ≤ 1 µA). Absolute range -0.3 V to V_OUT + 0.3 V.
4	GND	power_in	Device ground (电源地). Common return for input capacitor, output capacitor, external MOSFET source, and EN reference.
5	EXT	output	External MOSFET gate drive output. Drives the gate of the external N-channel power MOSFET (M1 in the typical application) to switch the boost inductor. Present only on the 'E' (external-switch) variants like QX2303E36F.

Key specifications

Parameter	Value
Manufacturer	QX Micro Devices
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

QX2303E36FEXXF
QX2303E36F
QX2303E36FLXXF
QX2303E36FLXXT
QX2303E36FLXXE
QX2303E36FLXXPO

CAD (KiCad official)

Symbol: QX2303E36F
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: QX Micro Devices datasheet (14 pp, sha256 01f635a84905a1ba, retrieved 2026-08-17, tier: lcsc)
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