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XT1861B302MR-G

Public Made by Adom

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NATLINEAR DC-DC Converters, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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XT1861B302MR-G

NATLINEAR · DC-DC Converters · SOT-23

XT1861B302MR-G from NATLINEAR, in a SOT-23. 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 GND power_in Device ground reference. Connect to the system ground plane close to the input and output capacitor return paths.
2 LX passive Inductor switching node. Connect to one end of the external boost inductor (L=10µH typ.); other end of the inductor goes to VIN. Internal power MOSFETs switch this node between GND and VOUT at up to 300 kHz; peak current is limited to ~800 mA typ. (1 A max).
3 VOUT power_out Regulated boost output (3.0V for the -302- option code). Bypass with a 22µF output capacitor to GND. Also serves as the internal supply for the PFM controller and feedback network; ±2.5% output accuracy.

Key specifications

Parameter Value
Manufacturer NATLINEAR
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • XT1861B302MR-GM
  • XT1861B302MR-GV
  • XT1861B302MR-GS
  • XT1861B302MR-GP
  • XT1861B302MR-GT
  • XT1861B302MR-GL

CAD (KiCad official)

  • Symbol: XT1861B302MR-G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: xt1861b302mr-g-etched.step / xt1861b302mr-g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xt1861b302mr-g.step / xt1861b302mr-g.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
xt1861b302mr-g.step 59 KB You want the bare part, or you mark your own boards.
xt1861b302mr-g-etched.step 2.5 MB You want the part with XT1861B302MR-G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 612 faces against 69 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: NATLINEAR datasheet (13 pp, sha256 e1a70537c466fa01, 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