LMR14206XMKX from Texas Instruments, 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	CB	passive	Bootstrap capacitor pin providing the high-side switch FET gate bias voltage. Connect a bootstrap capacitor (CBOOT) between CB and SW. Absolute max: CB-to-SW voltage 7 V.
2	GND	power_in	Device ground connection. Provides return path for both control circuitry and power stage.
3	FB	input	Feedback input pin. Set output voltage divider ratio so that VOUT = VFB(1+R1/R2) with VFB = 0.765 V nominal (0.747-0.782 V). Divider resistors should be in the 100 Ω to 10 kΩ range to avoid input bias errors (IFB ≈ 0.1 µA typical). Absolute max: -0.3 V to +5 V.
4	SHDN	input	Active-low logic-level shutdown input (overbar in datasheet). Pull to GND to disable, pull high to enable (VSHDN on threshold ≥2.3 V, off threshold ≤0.3 V). Tie to VIN or leave open if unused. An RC network on this pin can implement soft-start. Absolute max: -0.3 V to (VIN+0.3 V), <45 V.
5	VIN	power_in	Power input voltage pin. Operating range 4.5 V to 42 V; absolute max +45 V. Bypass locally with an input capacitor (CIN) to GND.
6	SW	power_out	Power FET switching output. Connect to the external inductor, catch diode, and CBOOT bootstrap capacitor. Rated up to 42 V; internal switch RDSON ≈ 0.9 Ω typical; current limit ≈ 1.15 A typical.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

LMR14206XMKX

CAD (KiCad official)

Symbol: LMR14206XMKX
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
`lmr14206xmkx.step`	97 KB	You want the bare part, or you mark your own boards.
`lmr14206xmkx-etched.step`	2.0 MB	You want the part with `LMR14206XMKX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 512 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: Texas Instruments datasheet (17 pp, sha256 cf0a3e1c2f2b5530, 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