main
Ray Set visibility: public ab98312 6h ago
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{
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  "type": "component",
  "slug": "lm2676s-3-3",
  "title": "LM2676S-3.3",
  "brief": "Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management ics",
    "lm2676s-3.3",
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  "component": {
    "mpn": "LM2676S-3.3",
    "manufacturer": "Texas Instruments",
    "package": "TO-263-7",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm2676.pdf",
    "parts": {
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      "model_3d_step_plain": "lm2676s-3-3.step",
      "lbr": "lm2676s-3-3.lbr"
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    "distributor_links": {
      "lcsc": "C181465",
      "digikey": "296-37723-5-ND",
      "mouser": "926-LM2676S-33"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T17:48:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-37723-5-ND",
        "status": "found",
        "lifecycle": "Obsolete"
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      "mouser": {
        "pn": "926-LM2676S-33",
        "status": "found",
        "lifecycle": "Obsolete"
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        "number": "1",
        "name": "Switch_output",
        "type": "output",
        "description": "Source pin of the internal high-side FET and the switching node; connect it to the inductor and the cathode of the external diode."
      },
      {
        "number": "2",
        "name": "Input",
        "type": "input",
        "description": "Supply input to the collector of the high-side FET; connect to the power supply and input bypass capacitor CIN, keeping the path to GND as short as possible, with a recommended supply voltage of 8 V to 40 V."
      },
      {
        "number": "3",
        "name": "CB",
        "type": "input",
        "description": "Bootstrap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the Switch_output pin."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin; connect to system ground, with the CIN and COUT ground connections kept short."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No-connect pin; leave unconnected."
      },
      {
        "number": "6",
        "name": "FB",
        "type": "input",
        "description": "Feedback sense input; connect to the feedback divider midpoint to set VOUT for the ADJ version, or connect directly to the output capacitor for fixed-output versions, with an absolute maximum pin voltage of 14 V."
      },
      {
        "number": "7",
        "name": "ON/OFF",
        "type": "input",
        "description": "Enable input to the regulator; high or floating enables the regulator and low turns it off."
      },
      {
        "number": "8",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
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        "consensus": "agreed",
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        "guard_notes": [
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        "cost_usd": 0.0539,
        "at": "2026-10-30T17:48:46"
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        "pages": 41,
        "sha256": "2f3085e42097cc93",
        "source_tier": "mfr"
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        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
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      "Manufacturer": "Texas Instruments",
      "Package": "TO-263-7",
      "Category": "Power Management ICs",
      "Pins": "8"
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      "contacts": {
        "quote": "(2) Junction to ambient thermal resistance (no external heat sink) for the 7-lead TO-220 package mounted vertically, with 0.5 in leads in a socket, or on a PCB with minimum copper area.",
        "page": 5,
        "doc": "ds.pdf",
        "material": "copper"
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    "characteristics": {
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          "name": "Output voltage (over line and load, 25 °C)",
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          "kind": "electrical",
          "unit": "V",
          "min": 3.234,
          "typ": 3.3,
          "max": 3.366,
          "conditions": "VIN = 8 V to 40 V, 100 mA ≤ IOUT ≤ 3 A; TA = TJ = 25 °C",
          "source_page": 5,
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        {
          "name": "Output voltage (over temperature)",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 3.201,
          "typ": 3.3,
          "max": 3.399,
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        {
          "name": "Quiescent current",
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          "unit": "mA",
          "min": null,
          "typ": 4.2,
          "max": 6,
          "conditions": "VFEEDBACK = 8 V for 3.3-V, 5-V, and ADJ versions",
          "source_page": 6,
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        {
          "name": "Standby quiescent current",
          "symbol": "ISTBY",
          "kind": "electrical",
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          "min": null,
          "typ": 50,
          "max": 100,
          "conditions": "ON/ OFF pin = 0 V",
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          "conditions": "over the entire junction temperature range of operation –40°C to 125°C",
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          "name": "Current limit",
          "symbol": "ICL",
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          "max": 5.25,
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          "name": "Current limit (over temperature)",
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          "conditions": "over the entire junction temperature range of operation – 40°C to 125°C",
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        {
          "name": "Output leakage current",
          "symbol": "IL",
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          "unit": "µA",
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          "max": 200,
          "conditions": "VIN = 40 V, soft-start pin = 0 V; VSWITCH = 0 V",
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        {
          "name": "Switch ON-resistance",
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          "max": 0.17,
          "conditions": "ISWITCH = 3 A",
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        {
          "name": "Switch ON-resistance (over temperature)",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 0.29,
          "conditions": "over the entire junction temperature range of operation –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Oscillator frequency (over temperature)",
          "symbol": "fO",
          "kind": "electrical",
          "unit": "kHz",
          "min": 225,
          "typ": null,
          "max": 280,
          "conditions": "over the entire junction temperature range of operation –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle",
          "symbol": "D",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
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          "conditions": "",
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        },
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          "name": "Minimum duty cycle",
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          "kind": "electrical",
          "unit": "%",
          "min": 0,
          "typ": null,
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          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF threshold voltage (over temperature)",
          "symbol": "VON/OFF",
          "kind": "electrical",
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          "min": 0.8,
          "typ": null,
          "max": 2,
          "conditions": "over the entire junction temperature range of operation –40°C to 125°C",
          "source_page": 6,
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        {
          "name": "ON/OFF input current (over temperature)",
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          "min": null,
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          "conditions": "over the entire junction temperature range of operation –40°C to 125°C",
          "source_page": 6,
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        {
          "name": "Input supply voltage",
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        {
          "name": "Soft-start pin voltage",
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          "unit": "V",
          "min": -0.1,
          "typ": null,
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        {
          "name": "Switch voltage to ground",
          "symbol": "",
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          "min": -1,
          "typ": null,
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          "conditions": "DC voltage; max printed as VIN",
          "source_page": 4,
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        {
          "name": "Feedback pin voltage",
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          "min": -0.3,
          "typ": null,
          "max": 14,
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        {
          "name": "Soldering temperature",
          "symbol": "",
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          "unit": "°C",
          "min": null,
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          "max": 260,
          "conditions": "Wave, 4 s",
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          "name": "Soldering temperature",
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          "unit": "°C",
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          "conditions": "Infrared, 10 s",
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          "name": "Soldering temperature",
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          "conditions": "Vapor phase, 75 s",
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          "name": "Storage temperature",
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          "min": -65,
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          "conditions": "",
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          "name": "Supply voltage",
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          "min": 8,
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          "min": null,
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          "min": null,
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          "source_page": 4,
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          "name": "Junction-to-ambient thermal resistance (KTW, DDPAK 7-pin)",
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          "min": null,
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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