LM2596S-ADJ

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2596s-adj",
  "title": "LM2596S-ADJ",
  "brief": "UMW DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "lm2596s-adj"
  ],
  "component": {
    "mpn": "LM2596S-ADJ",
    "manufacturer": "UMW",
    "package": "TO-263-5",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1fb50b1263feb5a9f9e3614efcf7858a.pdf",
    "parts": {
      "symbol": "lm2596s-adj.kicad_sym",
      "footprint": "lm2596s-adj.kicad_mod",
      "model_3d": "lm2596s-adj-etched.glb",
      "model_3d_plain": "lm2596s-adj.glb",
      "model_3d_step": "lm2596s-adj-etched.step",
      "model_3d_step_plain": "lm2596s-adj.step",
      "lbr": "lm2596s-adj.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage. Operating range 4.75V to 40V (LM2596) / 4.75V to 60V (LM2596HV). Absolute maximum 45V (63V for HV). Bypass with a low-ESR input capacitor (typ. 680 µF)."
      },
      {
        "number": "2",
        "name": "Output",
        "type": "output",
        "description": "Switching output pin. Emitter of the internal NPN power switch; connects to the external catch diode (e.g. 1N5824) and to the inductor of the buck output filter (typ. 33 µH). Steady-state voltage rated down to -1V; peak switch current limit typ. 4.5A."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground. Common return for the input capacitor, output capacitor, catch diode, and feedback divider."
      },
      {
        "number": "4",
        "name": "Feedback",
        "type": "input",
        "description": "Output voltage feedback input to the internal error amplifier. For the ADJ version, connect to the mid-point of an external resistor divider from VOUT; internal reference VFB = 1.23V (typ). Bias current 10 nA typ (100 nA max). Absolute max -0.3V to +25V."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "Active-low shutdown / enable input (bar over ON/OFF). Regulator is ON when the pin is Low (<0.6V) or left floating; regulator is OFF (standby, IQ typ 80 µA) when the pin is High (>2V). TTL-compatible; absolute max -0.3V to +25V."
      },
      {
        "number": "6",
        "name": "TAB",
        "type": "power_in",
        "description": "Exposed thermal pad. Present in the package land pattern; connect it per the manufacturer datasheet thermal recommendation. Added because the footprint carries this pad and the symbol had no pin for it.",
        "source": "derived-from-footprint"
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
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        "url": "https://datasheet.lcsc.com/datasheet/pdf/1fb50b1263feb5a9f9e3614efcf7858a.pdf",
        "pages": 28,
        "sha256": "26d031e9696524e9",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "viewers": {
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    },
    "pin1": {
      "pad": "1",
      "at": [
        -7.65,
        -3.4
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-263-5_TabPin6@sha256:77e8ff2d643255fc",
      "mark": "drawn"
    },
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          10,
          4.42
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "94c2a3dc1aaad85b6b5193f97d9a7c61b4e28bac25952a1e629557bcf747e246",
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        "sha256": "e57d17c14ce766e88738d4c29fa33e00340437d49f3923c0bfc7a24c3cec0f74",
        "checked": "2026-10-16",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "TO-263-5",
      "Category": "PMIC",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "26d031e9696524e9",
      "rows": [
        {
          "name": "Feedback voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 1.193,
          "typ": 1.23,
          "max": 1.267,
          "conditions": "4.5V≤VIN≤40V, 0.2A≤ILOAD≤3A, VOUT programmed for 3V, Figure 1 circuit; printed pairs are 1.193/1.180 (min) and 1.267/1.280 (max), the second value applying over full operating temperature range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Oscillator frequency",
          "symbol": "fO",
          "kind": "electrical",
          "unit": "kHz",
          "min": 117,
          "typ": 150,
          "max": 183,
          "conditions": "VIN=12V, ILOAD=500mA; printed pairs 117/117 and 183/183 are identical at 25°C and over full temperature range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Current limit (peak)",
          "symbol": "ICL",
          "kind": "electrical",
          "unit": "A",
          "min": 3.6,
          "typ": 4.5,
          "max": 6.9,
          "conditions": "Peak current (Notes 7, 8); printed pairs 3.6/3.4 (min) and 6.9/7.5 (max), the second value applying over full operating temperature range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Saturation voltage",
          "symbol": "VSAT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.16,
          "max": 1.4,
          "conditions": "IOUT=3A (Notes 7, 8); printed pair 1.4/1.5, the second value applying over full operating temperature range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Feedback bias current",
          "symbol": "IB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 10,
          "max": 50,
          "conditions": "VFB=1.3V, adjustable version only; printed pair 50/100, the second value applying over full operating temperature range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output leakage current, output=0V",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Output=0V (Notes 7, 9)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output leakage current, output=-1V",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2,
          "max": 30,
          "conditions": "Output=-1V (Note 10)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "Note 9: feedback pin connected to 12V to force output switch OFF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Standby quiescent current",
          "symbol": "ISTBY",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 80,
          "max": 200,
          "conditions": "ON/OFF pin=5V (OFF); printed pair 200/250, the second value applying over full operating temperature range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin logic input threshold voltage, high (regulator OFF)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": 1.3,
          "max": null,
          "conditions": "High (Regulator OFF); typ 1.3 is the single printed threshold typical value",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin logic input threshold voltage, low (regulator ON)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.3,
          "max": 0.6,
          "conditions": "Low (Regulator ON); typ 1.3 is the single printed threshold typical value",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input current, high",
          "symbol": "IH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 5,
          "max": 15,
          "conditions": "VLOGIC=2.5V (Regulator OFF)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input current, low",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.02,
          "max": 5,
          "conditions": "VLOGIC=0.5V (Regulator ON)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum supply voltage (LM2596, non-HV)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 45,
          "conditions": "Absolute maximum rating (Note 1); LM2596HV 63V rating not applicable to this part",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 25,
          "conditions": "Absolute maximum rating (Note 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Feedback pin voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 25,
          "conditions": "Absolute maximum rating (Note 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage to ground (steady state)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": null,
          "conditions": "Steady state (Note 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "Absolute maximum rating (Note 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature, vapor phase",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 215,
          "conditions": "Vapor phase, 60 sec.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature, infrared",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 245,
          "conditions": "Infrared, 10 sec.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "Absolute maximum rating (Note 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "-40°C ≤ TJ ≤ +125°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage (LM2596, non-HV)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.75,
          "typ": null,
          "max": 40,
          "conditions": "Operating conditions (LM2596); LM2596HV 4.75V~60V not applicable to this part",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle (ON)",
          "symbol": "DC",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Minimum duty cycle (OFF)",
          "symbol": "DC",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to case (TO-220 or TO-263)",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "TO-220 or TO-263 package, junction to case",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient, TO-263 (0.5 in² 1 oz copper)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "TO-263 tab soldered to single PCB with 0.5 in² (1 oz.) copper (Note 12)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient, TO-263 (2.5 in² single-sided)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 30,
          "max": null,
          "conditions": "TO-263 tab soldered to single-sided PCB with 2.5 in² (1 oz.) copper (Note 13)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient, TO-263 (3 in² double-sided)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "TO-263 tab soldered to double-sided PCB with 3 in² (1 oz.) copper on LM2596S side (Note 14)",
          "source_page": 7,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "LM2596S-ADJ (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
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  "variants": [
    {
      "mpn": "LM2596S-ADJ",
      "kind": "packaging"
    },
    {
      "mpn": "LM2596HVS-ADJ",
      "kind": "different-part"
    },
    {
      "mpn": "LM2596T-ADJ",
      "kind": "different-part"
    },
    {
      "mpn": "LM2596HVT-ADJ",
      "kind": "different-part"
    }
  ],
  "updated_at": "2026-09-28T16:15:40.336Z"
}