SK6011S5-33 from Suntek, 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	IN	power_in	Supply input pin, 1.9 V to 5.5 V. Must be closely decoupled to GND with a 1 µF or greater ceramic capacitor.
2	GND	power_in	Ground reference for the regulator.
3	EN	input	Enable control input, active high. VIH >= 1 V enables the output; VIL <= 0.4 V disables it. Internally pulled low by a 1 MΩ resistor to GND; do not leave floating. Tie to IN for always-on operation.
4	NC	unconnected	No connection. Leave floating or tie to a convenient net; no internal bond.
5	OUT	power_out	Regulated output pin, 3.3 V fixed (S5-33 option), up to 300 mA. Bypass with a 1 µF ceramic capacitor (X7R/X5R, ESR 5 mΩ to 500 mΩ) to GND. Internal 60 Ω auto-discharge to GND when EN is low.

Key specifications

Parameter	Value
Manufacturer	Suntek
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

SK6011S5-XX
SK6011UD4-XX
SK6011D4-XX

CAD (KiCad official)

Symbol: SK6011S5-33
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: Suntek datasheet (10 pp, sha256 092617e8e32c9b09, 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