HE9073A33M5R from HEERMICR, 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	VIN	power_in	Unregulated supply input. Operating range 2.0V to 7.0V (abs max 9.0V). Bypass to GND with a ≥4.7µF ceramic capacitor placed close to the pin.
2	GND	power_in	Device ground reference. Common return for VIN, VOUT, and EN.
3	CE	input	Chip Enable (active-high). Drive ≥1.2V to enable the regulator; ≤0.4V to shut down (IQ drops to ≤0.1µA). VON/OFF absolute max is VSS-0.3V to VIN+0.3V; do not leave floating.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for mechanical stability.
5	VOUT	power_out	Regulated 3.3V output (±1%), sourcing up to 500mA typical / 550mA current limit. Requires a ≥4.7µF ceramic output capacitor to GND for stability and transient response.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HE9073A33M5R
HE9073A33MR
HE9073A33M5RA12MR
HE9073A33M5RA15MR
HE9073A33M5RA18MR
HE9073A33M5RA25MR
HE9073A33M5RA28MR
HE9073A33M5RA30MR
HE9073A33M5RA36MR
HE9073A33M5RA50MR
HE9073A33M5RA30PR
HE9073A33M5RA33PR
HE9073A33M5RA50PR
HE9073A33M5RA12D4R
HE9073A33M5RA15D4R
HE9073A33M5RA18D4R
HE9073A33M5RA25D4R
HE9073A33M5RA28D4R
HE9073A33M5RA30D4R
HE9073A33M5RA33D4R

CAD (KiCad official)

Symbol: HE9073A33M5R
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: 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