RT9013-33GB from Richtek Tech, 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	EN	input	Enable input, active high (TTL-logic controlled). V_IH ≥ 1.6V enables the regulator; V_IL ≤ 0.6V places the device in shutdown mode (I_SHDN typ 0.7µA). Absolute-max 6V; do not float - tie through a 100k pull-down if unused.
2	GND	power_in	Common ground reference for the regulator. Provides the return path for input, output, and internal reference currents.
3	VIN	power_in	Supply input. Operating range 2.2V to 5.5V, absolute-max 6V. Bypass with a 1µF ceramic (X7R) capacitor close to the pin for stability and transient response.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for best PCB layout practice.
5	VOUT	power_out	Regulated output, fixed 3.3V (±2% accuracy at 10mA). Sources up to 500mA with 250mV typical dropout at full load. Requires only a 1µF ceramic (X7R) output capacitor for stability; current limit typ 0.5-0.6A.

Key specifications

Parameter	Value
Manufacturer	Richtek Tech
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

RT9013-33GB
RT9013-33GBPB
RT9013-33GBGU5
RT9013-33GBPU5
RT9013-33GBGY
RT9013-33GBPY
RT9013-33GBGQW
RT9013-33GBPQW

CAD (KiCad official)

Symbol: RT9013-33GB
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rt9013-33gb.step`	85 KB	You want the bare part, or you mark your own boards.
`rt9013-33gb-etched.step`	2.4 MB	You want the part with `RT9013-33GB` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 567 faces against 102 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: Richtek Tech datasheet (13 pp, sha256 779688f55e44aca5, 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