main
Ray Publish 0.2.1 48dfa54 2d ago
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  "title": "AMS1117-2.85",
  "brief": "Advanced Monolithic Systems Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e6935943fc6b1bbf350a1a0f3e90dc4a.pdf",
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    "distributor_links": {
      "lcsc": "C14791"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / negative supply reference for the fixed-voltage regulator. Serves as the internal Kelvin return for the top of the on-die output divider (R1 connected internally to case), so it can also be used for negative-side load sensing."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 2.85V output, 1A maximum (2.808V-2.892V typical, tightened tolerance 2.7645V-2.9355V over full temperature). Requires a 22µF solid tantalum output capacitor for frequency compensation and stability."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated DC input, 15V absolute maximum. Must exceed VOUT by at least 1.1V typical / 1.3V max dropout at 0.8A load; recommended nominal 4.35V for the 2.85V variant."
      }
    ],
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
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        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
        -3.15,
        -2.3
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-223-3_TabPin2@sha256:8ae5f03e2c16377a",
      "mark": "drawn"
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        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "27bc4d62d4b9cf0fd054b8063b91b760fa52a10471cad6bb1bf40d99292ec307",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "Advanced Monolithic Systems",
      "Package": "SOT-223",
      "Category": "PMIC",
      "Pins": "3"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "189a2651878a87d5",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.808,
          "typ": 2.85,
          "max": 2.892,
          "conditions": "VIN = 4.35V; IOUT = 0 mA; TJ = +25°C unless otherwise specified",
          "source_page": 2,
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        {
          "name": "Output Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7645,
          "typ": 2.85,
          "max": 2.9355,
          "conditions": "VIN = 4.35V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 0.3,
          "max": 6,
          "conditions": "1.5V ≤ (VIN - VOUT) ≤ 12V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 0.6,
          "max": 6,
          "conditions": "1.5V ≤ (VIN - VOUT) ≤ 12V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 12,
          "conditions": "VIN = 4.35V, 0 ≤ IOUT ≤ 0.8A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 20,
          "conditions": "VIN = 4.35V, 0 ≤ IOUT ≤ 0.8A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage (VIN - VOUT)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.1,
          "max": 1.3,
          "conditions": "ΔVOUT, ΔVREF = 1%, IOUT = 0.8A (Note 4)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": 900,
          "typ": 1100,
          "max": 1500,
          "conditions": "(VIN - VOUT) = 1.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 11,
          "conditions": "(VIN - VOUT) = 1.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 72,
          "max": null,
          "conditions": "f = 120Hz, COUT = 22µF Tantalum, IOUT = 1A, VIN = 4.35V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Long Term Stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.3,
          "max": 1,
          "conditions": "TA = 125°C, 1000Hrs",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 265,
          "conditions": "25 sec",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Operating Junction Temperature Range (Control Section)",
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          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Control section",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range (Power Transistor)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Power transistor",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Power Dissipation (line and load regulation guarantee)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "SOT-223; line and load regulation guaranteed up to this power dissipation (Note 2)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient",
          "symbol": "ϕJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 90,
          "max": null,
          "conditions": "SOT-223 package; with package soldering to copper area over backside ground plane or internal power plane",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Case",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "All packages",
          "source_page": 3,
          "source": "datasheet"
        }
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  "updated_at": "2026-09-24T16:22:25.890Z",
  "description": "Advanced Monolithic Systems Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}