HM8089 from GATEMODE, 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 pin for the IC. Drive high (>1.1V) to enable the regulator, drive low (<0.8V) to disable/shutdown. Leakage current typ. 1µA.
2	GND	power_in	Device ground return. Connect to a large copper area to improve thermal performance.
3	SW	output	Switch node / inductor connection. Connect the power inductor between SW and the regulator output. Internal high-side PMOS (Rdson ~120mΩ) and low-side NMOS (Rdson ~90mΩ) switch this node. Absolute max range -0.3V to VIN+0.3V; peak SW current 3A.
4	IN	power_in	Supply voltage input, 2.5V to 5.5V (absolute max 6V). Bypass with a 10µF ceramic capacitor to GND placed close to the pin.
5	FB	input	Feedback input to the internal error amplifier. Connect an external resistor divider from VOUT to FB and GND to program the output voltage between 0.6V and VIN. Internal reference Vref = 0.6V (typ), FB leakage typ. 0.1µA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HM8089T

CAD (KiCad official)

Symbol: HM8089
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: GATEMODE datasheet (10 pp, sha256 cbc75a09ae29fea3, 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