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AMS1117CD-5.0
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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+45@@ -0,0 +1,45 @@+# AMS1117CD-5.0++**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2++AMS1117CD-5.0 from UMW, in a TO-252-2. 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 / return for the regulator. On the fixed-voltage AMS1117-5.0 this pin is the device ground reference (labeled GND/ADJ in the shared pinout table; on fixed versions the internal F1/F2 fuses connect it as GND). |+| 2 | VOUT | power_out | Regulated 5.0V output (1.176-1.224V per-cell trim; fixed 5.0V ±2% for the -5.0 variant). Requires a ≥22µF tantalum output capacitor for stability. Rated 1A continuous; current-limited at ~2.1-2.5A. On TO-252 this pin is electrically tied to the exposed tab. |+| 3 | VIN | power_in | Unregulated input supply. Absolute maximum 18V; recommended operating input 12V max. For a 5.0V output, VIN must be ≥ VOUT + VDROP (typ. 1.2V @ 1A). A 10µF input capacitor is recommended. |+| 4 | TAB | power_out | Exposed thermal tab on TO-252 (DPAK). Electrically connected to VOUT (pin 2) - solder to a copper pour tied to VOUT for heatsinking. Junction-to-ambient thermal resistance is 100°C/W for the TO-252 package. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | TO-252-2 |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `AMS1117CD-5.0CD-5.0`+- `AMS1117CD-5.0-5.0`+- `AMS1117CD-5.0S-5.0`++## CAD (KiCad official)++- Symbol: `AMS1117CD-5.0`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](docs/ams1117cd-5-0-datasheet.pdf) (13 pp, sha256 `5ec219092aa45bd9`, 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](docs/ams1117cd-5-0-datasheet.pdf)
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