LM5122MHE

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5122mhe",
  "title": "LM5122MHE",
  "brief": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "lm5122mhe",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM5122MHE",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm5122.pdf",
    "parts": {
      "symbol": "lm5122mhe.kicad_sym",
      "footprint": "lm5122mhe.kicad_mod",
      "model_3d": "lm5122mhe-hero.glb",
      "model_3d_plain": "lm5122mhe-etched.glb",
      "model_3d_step": "lm5122mhe-etched.step",
      "model_3d_step_plain": "lm5122mhe.step",
      "lbr": "lm5122mhe.lbr"
    },
    "distributor_links": {
      "lcsc": "C544455"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T21:59:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SYNCOUT",
        "type": "output",
        "description": "Clock output pin providing a 180° shifted clock for interleaved operation, which can be left floating when unused."
      },
      {
        "number": "2",
        "name": "OPT",
        "type": "input",
        "description": "Clock synchronization selection pin that also enables or disables SYNCOUT in master/slave configuration, and it should not be left floating."
      },
      {
        "number": "3",
        "name": "CSN",
        "type": "input",
        "description": "Inverting input of the current sense amplifier, connected to the negative side of the current sense resistor."
      },
      {
        "number": "4",
        "name": "CSP",
        "type": "input",
        "description": "Non-inverting input of the current sense amplifier, connected to the positive side of the current sense resistor."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input for the VCC regulator, rated 4.5 V to 65 V recommended operating range, connected with short low-impedance paths."
      },
      {
        "number": "6",
        "name": "UVLO",
        "type": "input",
        "description": "Undervoltage lockout programming pin; below 0.4 V the regulator shuts down, and above 1.2 V the start-up sequence begins, and it should not be left floating."
      },
      {
        "number": "7",
        "name": "SS",
        "type": "input",
        "description": "Soft-start programming pin where an external capacitor and an internal 10-µA current source set the error amplifier reference ramp rate."
      },
      {
        "number": "8",
        "name": "SYNCIN/RT",
        "type": "input",
        "description": "Oscillator frequency is programmed by a single resistor to AGND, and the oscillator can be synchronized by a positive pulse applied to this pin, with a recommended maximum master oscillator frequency of 2 MHz."
      },
      {
        "number": "9",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground connection serving as the return for the internal voltage reference and analog circuits."
      },
      {
        "number": "10",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the internal error amplifier where the regulation threshold is 1.2 V and the output voltage is set by a resistor divider."
      },
      {
        "number": "11",
        "name": "COMP",
        "type": "output",
        "description": "Output of the internal error amplifier, where the loop compensation network connects between this pin and FB."
      },
      {
        "number": "12",
        "name": "SLOPE",
        "type": "input",
        "description": "Slope compensation is programmed by a single resistor connected between SLOPE and AGND."
      },
      {
        "number": "13",
        "name": "MODE",
        "type": "input",
        "description": "Switching mode selection pin with an internal 700-kΩ pullup and 100-kΩ pulldown defaulting to 0.15 V; voltages above the 1.2 V threshold enable forced PWM and below it enable diode emulation."
      },
      {
        "number": "14",
        "name": "RES",
        "type": "output",
        "description": "Restart timer pin for an external capacitor that sets hiccup-mode off-time and restart delay, and it must connect directly to AGND when hiccup mode is not required."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground connection for the low-side N-channel MOSFET gate driver, connected directly to the low-side MOSFET source."
      },
      {
        "number": "16",
        "name": "LO",
        "type": "output",
        "description": "Low-side N-channel MOSFET gate drive output, connected to the low-side MOSFET gate through a short, low-inductance path."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "VCC bias supply pin that must be locally decoupled to PGND with a low ESR/ESL capacitor placed as close to the controller as possible, with a recommended operating range of 14 V maximum."
      },
      {
        "number": "18",
        "name": "SW",
        "type": "bidirectional",
        "description": "Switching node of the boost regulator, connected to the bootstrap capacitor, high-side MOSFET source and low-side MOSFET drain through short, low-inductance paths, rated up to 100 V."
      },
      {
        "number": "19",
        "name": "HO",
        "type": "output",
        "description": "High-side N-channel MOSFET gate drive output, connected to the high-side MOSFET gate through a short, low-inductance path."
      },
      {
        "number": "20",
        "name": "BST",
        "type": "power_in",
        "description": "High-side driver supply for bootstrap gate drive, connected to the bootstrap diode cathode and bootstrap capacitor, with a recommended BST to SW voltage of 3.8 V to 14 V."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: MPN LM5122MHE maps to the 20-pin PWP HTSSOP with exposed pad (package addendum, page 47). Pin number; Types are mapped from the datasheet's TYPE column. VCC (listed P/O/I) is mapped to power_in as the b; The EP exposed pad is listed in the table with no electrical connection; it is included as passive f"
        ],
        "pages_sent": 11,
        "cost_usd": 0.025,
        "at": "2026-11-05T21:59:26"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm5122.pdf",
        "pages": 58,
        "sha256": "8b269c8857f1031c",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "checked": "2026-11-05",
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      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "HTSSOP-20-EP",
      "Category": "Power Management (PMIC)",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8b269c8857f1031c44a6e974c1b81eb330d118f743b8381a16996f98cd9da27b",
      "rows": [
        {
          "name": "Input voltage",
          "symbol": "VIN, CSP, CSN",
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          "min": -0.3,
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          "max": 75,
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        },
        {
          "name": "BST to SW, FB, MODE, UVLO, OPT, VCC voltage",
          "symbol": "BST to SW, FB, MODE, UVLO, OPT, VCC",
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        {
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          "typ": null,
          "max": 115,
          "conditions": "",
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        },
        {
          "name": "SS, SLOPE, SYNCIN/RT voltage",
          "symbol": "SS, SLOPE, SYNCIN/RT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
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        {
          "name": "CSP to CSN, PGND voltage",
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        {
          "name": "LO voltage",
          "symbol": "LO",
          "kind": "absolute_maximum",
          "unit": "V",
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        {
          "name": "COMP, RES, SYNCOUT voltage",
          "symbol": "COMP, RES, SYNCOUT",
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        {
          "name": "Thermal junction temperature",
          "symbol": "TJ",
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          "unit": "°C",
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          "conditions": "",
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
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          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Input supply voltage",
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          "min": 4.5,
          "typ": null,
          "max": 65,
          "conditions": "",
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        {
          "name": "Low-side driver bias voltage",
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          "name": "High-side driver bias voltage",
          "symbol": "BST to SW",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3.8,
          "typ": null,
          "max": 14,
          "conditions": "",
          "source_page": 7,
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        },
        {
          "name": "Current sense common mode range",
          "symbol": "CSP, CSN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
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          "conditions": "",
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        {
          "name": "Switch node voltage",
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        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        },
        {
          "name": "VCC regulation",
          "symbol": "VCC(REG)",
          "kind": "electrical",
          "unit": "V",
          "min": 6.9,
          "typ": 7.6,
          "max": 8.3,
          "conditions": "No load",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VCC undervoltage threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 3.9,
          "typ": 4,
          "max": 4.1,
          "conditions": "VCC rising, VVIN = 4.5 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "UVLO threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1.17,
          "typ": 1.2,
          "max": 1.23,
          "conditions": "UVLO rising",
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          "source": "datasheet"
        },
        {
          "name": "UVLO standby enable threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.3,
          "typ": 0.4,
          "max": 0.5,
          "conditions": "UVLO rising",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "UVLO hysteresis current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": 7,
          "typ": 10,
          "max": 13,
          "conditions": "VUVLO = 1.4 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VIN shutdown current",
          "symbol": "ISHUTDOWN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 9,
          "max": 17,
          "conditions": "VUVLO = 0 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VIN operating current (exclude the current into RT resistor)",
          "symbol": "IBIAS",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4,
          "max": 5,
          "conditions": "VUVLO = 2 V, non-switching",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VCC sourcing current limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": 50,
          "typ": null,
          "max": 62,
          "conditions": "VVCC = 0 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VCC dropout (VIN to VCC)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.28,
          "max": 0.5,
          "conditions": "VVIN = 4.5 V, IVCC = 25 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VCC operating current (exclude the current into RT resistor)",
          "symbol": "IVCC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.5,
          "max": 5,
          "conditions": "VVCC = 8.3 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VCC operating current (exclude the current into RT resistor)",
          "symbol": "IVCC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.5,
          "max": 8,
          "conditions": "VVCC = 12 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Default MODE voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": 145,
          "typ": 155,
          "max": 170,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Diode emulation mode threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.24,
          "max": 1.28,
          "conditions": "MODE rising",
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          "source": "datasheet"
        },
        {
          "name": "FB reference voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.188,
          "typ": 1.2,
          "max": 1.212,
          "conditions": "Measured at FB, VFB = VCOMP",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Slave mode threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 3.4,
          "conditions": "FB rising",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency 1",
          "symbol": "fSW1",
          "kind": "electrical",
          "unit": "kHz",
          "min": 400,
          "typ": 450,
          "max": 500,
          "conditions": "RT = 20 kΩ",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency 2",
          "symbol": "fSW2",
          "kind": "electrical",
          "unit": "kHz",
          "min": 775,
          "typ": 875,
          "max": 975,
          "conditions": "RT = 10 kΩ",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "RT sync rising threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 2.9,
          "conditions": "RT rising",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "RT sync falling threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1.6,
          "typ": null,
          "max": 2,
          "conditions": "RT falling",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "SYNCOUT high-state voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 3.3,
          "typ": null,
          "max": 4.3,
          "conditions": "ISYNCOUT = –1 mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Synchronization selection threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": 3,
          "max": 4,
          "conditions": "OPT rising",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "SLOPE output voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1.17,
          "typ": 1.2,
          "max": 1.23,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Slope compensation amplitude",
          "symbol": "VSLOPE",
          "kind": "electrical",
          "unit": "V",
          "min": 1.375,
          "typ": 1.65,
          "max": 1.925,
          "conditions": "RSLOPE = 20 kΩ, fSW = 100 kHz, 50% duty cycle, TJ = –40°C to 125°C",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Slope compensation amplitude",
          "symbol": "VSLOPE",
          "kind": "electrical",
          "unit": "V",
          "min": 1.4,
          "typ": 1.65,
          "max": 1.9,
          "conditions": "RSLOPE = 20 kΩ, fSW = 100 kHz, 50% duty cycle, TJ = 25°C",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "SS current source",
          "symbol": "ISS-SOURCE",
          "kind": "electrical",
          "unit": "µA",
          "min": 7.5,
          "typ": 10,
          "max": 12,
          "conditions": "VSS = 0 V",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Forced LO off-time",
          "symbol": "tLO-OFF",
          "kind": "timing",
          "unit": "ns",
          "min": 330,
          "typ": 400,
          "max": null,
          "conditions": "VVCC = 5.5 V",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Forced LO off-time",
          "symbol": "tLO-OFF",
          "kind": "timing",
          "unit": "ns",
          "min": 560,
          "typ": 750,
          "max": null,
          "conditions": "VVCC = 4.5 V",
          "source_page": 8,
          "source": "datasheet"
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