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AMS1117-5.0

Public Made by Adom

by adom

AMS 1 A low-dropout fixed 5 V regulator, SOT-223. The 5 V sibling of the AMS1117-3.3. Datasheet-verified.

componentvoltage-regulatorldo5vsot-223power
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ams1117-5v0-etched.step ams1117-5v0: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
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AMS1117-5.0

Advanced Monolithic Systems · 1 A LDO regulator (fixed 5 V) · SOT-223

The 5 V version of the AMS1117, a 1 A low-dropout linear regulator in the SOT-223 tab package. It regulates a higher unregulated input down to a fixed 5 V with 1.5% reference tolerance, dropping about 1.3 V at 0.8 A, so a 7-12 V input gives a clean 5 V rail for logic, USB, and sensors. Internal current limiting and thermal shutdown protect it, and a 10 uF output capacitor keeps it stable. The tab (pin 2) is the output and the thermal path. Use the AMS1117-3.3 for 3.3 V rails.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the fixed-output regulator. Internally the top of the divider is Kelvin-connected to VOUT so this pin can be used for negative-side sensing at the load.
2 VOUT power_out Regulated 5.0V output. Requires a 22uF solid tantalum output capacitor for frequency compensation and stability across all load conditions. Delivers up to 1A with 1.3V max dropout at 0.8A.
3 VIN power_in Unregulated input supply. Must be at least VOUT + 1.3V (dropout) up to a 15V absolute maximum. An input capacitor is recommended when the source impedance is significant or when the input line is long.

Key specifications

Parameter Value
Type Fixed LDO linear regulator
Output voltage 5.0 V (1.5% tol)
Output current up to 1 A
Dropout 1.3 V max at 0.8 A
Protection Current limit + thermal shutdown
Output cap 10 µF (stability)
Package SOT-223 (tab = VOUT)
Line regulation typ. 0.2%

Ordering variants

Same part, different packaging or reel option.

The extractor listed these alongside AMS1117-5.0, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • AMS1117-5.0 (SOT-223)
  • AMS1117-5.0/TR (SOT-223, tape & reel)

CAD (KiCad official)

  • Symbol: Regulator_Linear:AMS1117-5.0
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D)
  • 3D model files: ams1117-5v0-etched.step / ams1117-5v0-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ams1117-5v0.step / ams1117-5v0.glb are the bare package body.

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: 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