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AMS1117-2.85

Public Unreviewed

by Ray

Advanced Monolithic Systems AMS1117 2 85 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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AMS1117-2.85

Advanced Monolithic Systems AMS1117 2 85 · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

AMS1117-2.85 from Advanced Monolithic Systems AMS1117 2 85, in a SOT-223. 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 Ground / negative supply reference for the fixed-voltage regulator. Serves as the internal Kelvin return for the top of the on-die output divider (R1 connected internally to case), so it can also be used for negative-side load sensing.
2 VOUT power_out Regulated 2.85V output, 1A maximum (2.808V-2.892V typical, tightened tolerance 2.7645V-2.9355V over full temperature). Requires a 22µF solid tantalum output capacitor for frequency compensation and stability.
3 VIN power_in Unregulated DC input, 15V absolute maximum. Must exceed VOUT by at least 1.1V typical / 1.3V max dropout at 0.8A load; recommended nominal 4.35V for the 2.85V variant.

Key specifications

Parameter Value
Manufacturer Advanced Monolithic Systems AMS1117 2 85
Package SOT-223
Category PMIC
Pins 3

Ordering variants

  • AMS1117-2.85
  • AMS1117-2.85AMS1117CD-2.85
  • AMS1117-2.85AMS1117CS-2.85

CAD (KiCad official)

  • Symbol: AMS1117-2.85
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ams1117-2-85.step 64 KB You want the bare part, or you mark your own boards.
ams1117-2-85-etched.step 1.8 MB You want the part with AMS1117-2.85 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 456 faces against 75 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: Advanced Monolithic Systems AMS1117 2 85 datasheet (8 pp, sha256 189a2651878a87d5, 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