BD9G101G-TR from ROHM, 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	BST	passive	Bootstrap supply for the floating high-side power NMOS driver. Connect a bypass capacitor between BST and LX for bootstrap operation. Max BST-to-GND 50V; max BST-to-LX 7V.
2	GND	power_in	Ground return. Should be connected as close as possible to the output capacitor ground to avoid the high-current switching path.
3	FB	input	Voltage feedback pin; error-amp input. The DC/DC regulates FB to 0.75V (±1.5% at 25°C). Set output voltage with an external resistor divider from VOUT to FB. Max FB voltage 7V.
4	EN	input	Enable input. DC/DC starts when EN ≥ 2.0V; shuts down when EN is open or ≤ 0.8V. Internal pull-down of about 550kΩ to GND. Max EN voltage 45V.
5	VCC	power_in	Input supply pin, 6V to 42V operating range (45V absolute max). Should be bypassed with a capacitor located as close to the pin as possible.
6	LX	output	Power NMOS switch node output. Connect to the Schottky freewheeling diode and inductor as close to the pin as possible. Max LX voltage 45V; typical switch current limit 1.2A.

Key specifications

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

Ordering variants

BD9G101G-TR

CAD (KiCad official)

Symbol: BD9G101G-TR
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
`bd9g101g-tr.step`	97 KB	You want the bare part, or you mark your own boards.
`bd9g101g-tr-etched.step`	2.0 MB	You want the part with `BD9G101G-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 501 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: ROHM datasheet (26 pp, sha256 8a1aa401940eac2d, retrieved 2026-08-17, tier: manufacturer)
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