STI3470 from TMI, 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	BS	passive	Bootstrap pin. A 0.1uF capacitor is connected between LX and BS to form a floating supply for the high-side switch driver. Absolute max 25V.
2	GND	power_in	Device ground reference. Connect to the ground plane with a low-impedance path.
3	FB	input	Adjustable version feedback input. Connect to the center of an external resistor divider from VOUT. Regulated to the internal 0.6V reference (0.588V/0.600V/0.612V).
4	EN	input	Enable input. Drive to logic-high (>=1.5V) to enable the IC; drive to logic-low (<=0.3V) to disable and enter micro-power shutdown. Absolute max 23V.
5	IN	power_in	Power supply input pin. Operating range 3.5V-18V; absolute max 23V. Bypass with a low-ESR ceramic capacitor (typically 22uF) close to the pin.
6	LX	output	Switching node. Internal high-side (120mOhm) and low-side (80mOhm) MOSFET common node. Connect to the external inductor; also references the BS bootstrap capacitor. Absolute max 23V.

Key specifications

Parameter	Value
Manufacturer	TMI
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

STI3470

CAD (KiCad official)

Symbol: STI3470
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: TMI datasheet (13 pp, sha256 2fb3b7dd78ed2071, 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