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AMS1117CD-1.8

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by Ray

Advanced Monolithic Systems Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

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AMS1117CD-1.8

Advanced Monolithic Systems · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

AMS1117CD-1.8 from Advanced Monolithic Systems, in a TO-252. 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 reference pin for the fixed 1.8V regulator. Also used as the negative-side sense return for the internal Kelvin-connected output divider.
2 VOUT power_out Regulated 1.8V output (1.773V-1.827V typ at TJ=25°C). Requires at least 22µF solid tantalum output capacitor for stability. Rated up to 1A output current.
3 VIN power_in Unregulated supply input. Absolute maximum 15V. Requires (VIN - VOUT) ≥ ~1.1V dropout at 0.8A to maintain regulation; typical VIN for the 1.8V variant is 3.3V.
TAB VOUT power_out Metal tab, electrically connected to VOUT. Serves as the primary thermal path (θJC = 15°C/W); solder to a copper pour to lower junction-to-ambient thermal resistance.

Key specifications

Parameter Value
Manufacturer Advanced Monolithic Systems
Package TO-252
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • AMS1117CD-1.8
  • AMS1117-1.8
  • AMS1117CS-1.8

CAD (KiCad official)

  • Symbol: AMS1117CD-1.8
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Advanced Monolithic Systems 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