MT9284BS6 from Aerosemi, in a SOT-23-6. 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	SW	power_out	Switching node. Drain of the internal N-channel power MOSFET; connect to the switched side of the external boost inductor and the anode of the external Schottky diode. Absolute maximum 30V; high-impedance during shutdown.
2	GND	power_in	Device ground. Return for the internal power MOSFET source, control circuitry, and current-sense resistor RCS. Connect to a strong ground plane for heat sinking and noise protection.
3	FB	input	Current-sense feedback input. Regulated to VFB = 250mV (typ, MT9284BS6). Connect an external sense resistor RCS = VFB/ILED from FB to GND to program the LED current; the LED string return current flows through RCS.
4	EN	input	Enable / PWM dimming input. Pull above 1.5V to enable the IC; below 0.4V shuts the part down (<1µA). Accepts a 20kHz-1MHz PWM dimming signal whose duty cycle sets the average LED current. EN leakage ±1µA max; absolute max 6V.
5	OV	input	Over-voltage sense input. Monitors the boost output at the top of the LED string; when VOUT (as sensed on OV) rises past ~28V the internal NMOS is turned off, protecting the part against an open-LED fault.
6	VIN	power_in	Power supply input, 2.5V-5.5V operating range (absolute max 6V). Powers the control circuitry and, through the external inductor, the boost stage. Must be decoupled to GND with a 1µF (or greater) low-ESR ceramic capacitor placed close to the pin.

Key specifications

Parameter	Value
Manufacturer	Aerosemi
Package	SOT-23-6
Category	LED-drv
Pins	6

Ordering variants

Same part, different packaging or reel option.

MT9284BS6
MT9284BS6-28J
MT9284BS6AS6
MT9284BS6CS6

CAD (KiCad official)

Symbol: MT9284BS6
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mt9284bs6.step`	97 KB	You want the bare part, or you mark your own boards.
`mt9284bs6-etched.step`	2.1 MB	You want the part with `MT9284BS6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 507 faces against 117 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: Aerosemi datasheet (10 pp, sha256 160f453af9ad4b55, 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