HE9073A33MR from HEERMICR, in a SOT-23. 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	GND	power_in	Ground / device negative supply return. All bypass capacitor return currents connect here.
2	VOUT	power_out	Regulated 3.3 V output. Requires a >=4.7 uF output capacitor (COUT >= 1 uF minimum per electrical characteristics). Delivers up to 500 mA typical, ±1% accuracy, dropout ~100 mV at 100 mA.
3	VIN	power_in	Unregulated input supply, 2.0 V to 7.0 V (absolute max 9.0 V). Bypass with a >=4.7 uF capacitor close to the pin. In the SOT23-3 package the enable function is internally tied to VIN (device is always enabled when powered).

Key specifications

Parameter	Value
Manufacturer	HEERMICR
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

HE9073A33MR
HE9073A33MRM5R
HE9073A33MRPR
HE9073A33MRD4R

CAD (KiCad official)

Symbol: HE9073A33MR
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`he9073a33mr.step`	59 KB	You want the bare part, or you mark your own boards.
`he9073a33mr-etched.step`	2.1 MB	You want the part with `HE9073A33MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 511 faces against 69 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: HEERMICR datasheet (12 pp, sha256 27a01576a32d0f6f, 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