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a1117-3-3
Public Unreviewedby Ray
IDCHIP A1117 3 3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownA1117-3.3
IDCHIP A1117 3 3 · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
A1117-3.3 from IDCHIP A1117 3 3, 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 / adjust return. On fixed-voltage variants (including the 3.3V option) this pin is the device ground reference; on the ADJ variant the same pin is the feedback/adjust node. Tie directly to the system ground plane for the AMS1117-3.3. |
| 2 | VOUT | power_out | Regulated 3.3V output (spec 3.234V - 3.366V over 10mA ≤ IOUT ≤ 1A with 4.75V ≤ VIN ≤ 15V). Requires a 22µF tantalum output capacitor for loop stability per the typical application circuit. |
| 3 | VIN | power_in | Unregulated input supply. Absolute maximum 20V; recommended operating range 1.5V-15V (must be ≥ VOUT + dropout, i.e. ≥ 4.75V for reliable 3.3V regulation up to 1A). Bypass with 10µF tantalum at the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | IDCHIP A1117 3 3 |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
A1117-3.3AMS1117-3.3
CAD (KiCad official)
- Symbol:
A1117-3.3 - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: IDCHIP A1117 3 3 datasheet (None pp, sha256
f0d9f8a878381ab5, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).