MT9284CS6 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	output	Switch node. Drain of the integrated N-channel power MOSFET; connect to the switched side of the external boost inductor and to the anode of the external Schottky rectifier. Rated up to 30V absolute maximum; high-impedance during shutdown.
2	GND	power_in	Device ground. Return for the internal power MOSFET current and analog reference; tie to a strong ground plane close to the input/output decoupling capacitors for heat-sinking and noise control.
3	FB	input	Current-sense feedback input. Connect an external sense resistor RCS from FB to GND; the LED string current is regulated so that V(FB) equals the regulated feedback voltage (300mV typ. for MT9284CS6, ILED = VFB / RCS).
4	EN	input	Enable and PWM dimming input. Pull above 1.5V to enable the IC; pull below 0.4V for shutdown (<1µA). Accepts an unfiltered 20kHz-1MHz PWM signal for LED brightness control, producing DC LED current proportional to duty cycle.
5	OV	input	Over-voltage sense input. Connect to the top of the LED string (VOUT). The internal power MOSFET is disabled when VOV rises above the 28V OVP threshold to protect the part in open-LED conditions.
6	VIN	power_in	Power supply input, 2.5V to 5.5V operating range (6V absolute max). Decouple to GND with a 1µF or greater ceramic capacitor (4.7µF X5R/X7R recommended) placed close to the IC.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

MT9284CS6
MT9284CS6AS6
MT9284CS6BS6
MT9284CS6-28J

CAD (KiCad official)

Symbol: MT9284CS6
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
`mt9284cs6.step`	97 KB	You want the bare part, or you mark your own boards.
`mt9284cs6-etched.step`	2.1 MB	You want the part with `MT9284CS6` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 491 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 ed985487c92f10a6, 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