AMS1117-3.3

@@ -0,0 +1,47 @@+# AMS1117-3.3++**Advanced Monolithic Systems** · 1 A LDO regulator (fixed 3.3 V) · SOT-223++The 3.3 V version of the AMS1117, a 1 A low-dropout linear regulator in the small SOT-223 tab package that powers a huge number of 3.3 V boards. It holds the output at a fixed 3.3 V with 1.5% reference tolerance and needs only about 1.3 V of headroom at 0.8 A, so a 5 V rail regulates down cleanly. Internal current limiting and thermal shutdown protect it against overload. A 10 uF output capacitor keeps it stable. The tab (pin 2) is the output and the thermal path.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Ground reference for the fixed-voltage regulator. Also serves as the negative-side sense point; the top of the internal output divider (R1) is Kelvin-connected to the output tab internally. |+| 2 | VOUT | power_out | Regulated 3.3V output; 3.251-3.349 V at TJ=25C, VIN=4.8V. Rated 1A continuous with maximum 1.3V dropout at 0.8A. Requires a 22uF solid tantalum output capacitor for loop stability. Internally shared with the SOT-223 tab (pin 4). |+| 3 | VIN | power_in | Unregulated input supply. Absolute maximum 15V. Requires (VIN - VOUT) >= 1.1-1.3V dropout at up to 0.8A to remain in regulation; recommended VIN = 4.75V for the 3.3V version. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Fixed LDO linear regulator |+| Output voltage | 3.3 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++- `AMS1117-3.3 (SOT-223)`+- `AMS1117-3.3/TR (SOT-223, tape & reel)`++## CAD (KiCad official)++- Symbol: `Regulator_Linear:AMS1117-3.3`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Advanced Monolithic Systems datasheet](http://www.advanced-monolithic.com/pdf/ds1117.pdf) (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](docs/ams1117-3v3-datasheet.pdf)

@@ -0,0 +1,35 @@+{+  "slug": "ams1117-3v3",+  "version": "0.1.0",+  "type": "component",+  "description": "AMS 1 A low-dropout fixed 3.3 V regulator, SOT-223. 1.3 V dropout at 0.8 A, internal current + thermal limit. Datasheet-verified.",+  "tags": [+    "component",+    "voltage-regulator",+    "ldo",+    "3v3",+    "sot-223",+    "power"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "ams1117-3v3.kicad_sym",+    "ams1117-3v3.kicad_mod",+    "ams1117-3v3.glb",+    "docs/hero.png",+    "docs/ams1117-3v3-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file