LM25576MH

{
  "slug": "lm25576mh",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm25576mh",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm25576mh.kicad_sym",
    "lm25576mh.kicad_mod",
    "lm25576mh.glb",
    "lm25576mh.step",
    "lm25576mh.lbr",
    "docs/hero.png",
    "docs/lm25576mh-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm25576mh-hero.glb",
    "lm25576mh-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM25576MH",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm25576",
    "parts": {
      "symbol": "lm25576mh.kicad_sym",
      "footprint": "lm25576mh.kicad_mod",
      "model_3d": "lm25576mh-hero.glb",
      "model_3d_plain": "lm25576mh.glb",
      "model_3d_step": "lm25576mh-etched.step",
      "model_3d_step_plain": "lm25576mh.step",
      "lbr": "lm25576mh.lbr"
    },
    "distributor_links": {
      "lcsc": "C1355313",
      "mouser": "926-LM25576MH"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T12:55:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "926-LM25576MH",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_out",
        "description": "Bias regulator output that follows VIN below 9 V and regulates to about 7 V above 9 V; needs a 0.1 µF to 1 µF ceramic decoupling capacitor, and an external 7.5 V to 14 V may be applied to reduce power dissipation, with VCC never allowed to exceed VIN."
      },
      {
        "number": "2",
        "name": "SD",
        "type": "input",
        "description": "Shutdown/UVLO input: below 0.7 V the regulator is in low-power shutdown, 0.7 V to 1.225 V gives standby, above 1.225 V it operates; an internal 5 µA pull-up applies when open and SD must never exceed 14 V."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin with a nominal operating range of 6 V to 42 V and an absolute maximum of 45 V."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin, the second VIN pin, with a nominal operating range of 6 V to 42 V and an absolute maximum of 45 V."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Oscillator synchronization input/output that can be driven by an external open-drain clock with pulses longer than 15 ns, and may be tied to other LM25576 devices to synchronize them; SYNC to GND is limited to 7 V."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Internal error amplifier output; the loop compensation network connects between this pin and FB."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the inverting input of the internal error amplifier, with a regulation threshold of 1.225 V and a 7 V absolute maximum."
      },
      {
        "number": "8",
        "name": "RT",
        "type": "input",
        "description": "Oscillator frequency-setting pin; a single resistor from RT to AGND sets the switching frequency between 50 kHz and 1 MHz."
      },
      {
        "number": "9",
        "name": "RAMP",
        "type": "output",
        "description": "Slope-compensation ramp pin; a capacitor between RAMP and AGND, recommended 50 pF to 2000 pF, sets the emulated current-ramp slope, with a 7 V absolute maximum."
      },
      {
        "number": "10",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground and internal reference for the regulator control functions; resistors and small-signal capacitors (RT, SS, RAMP) must return directly to this pin."
      },
      {
        "number": "11",
        "name": "SS",
        "type": "output",
        "description": "Soft-start pin; an external capacitor with the internal 10 µA source sets the reference rise time, and the pin is held low during standby, VCC UVLO and thermal shutdown, with a 7 V absolute maximum."
      },
      {
        "number": "12",
        "name": "OUT",
        "type": "output",
        "description": "Output voltage sense connection, connected directly to the regulated output voltage; OUT to GND is limited by VIN."
      },
      {
        "number": "13",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground, the low-side reference for the power switch and the IS sense resistor."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground, the second PGND pin, serving as the low-side reference for the power switch and the IS sense resistor."
      },
      {
        "number": "15",
        "name": "IS",
        "type": "input",
        "description": "Recirculating diode current-sense connection to the internal sense resistor and sample-and-hold, which senses diode current at the end of the off-time and sets the DC level of the emulated ramp."
      },
      {
        "number": "16",
        "name": "IS",
        "type": "input",
        "description": "Recirculating diode current-sense connection, the second IS pin, tied to the same internal sense resistor and sample-and-hold as pin 15."
      },
      {
        "number": "17",
        "name": "SW",
        "type": "output",
        "description": "Switch node, the source terminal of the internal buck switch, which must connect to the external Schottky diode and buck inductor; steady-state SW to GND is limited to -1.5 V."
      },
      {
        "number": "18",
        "name": "SW",
        "type": "output",
        "description": "Switch node, the second SW pin, which must connect to the external Schottky diode and buck inductor."
      },
      {
        "number": "19",
        "name": "PRE",
        "type": "input",
        "description": "Bootstrap precharge assist pin, an open-drain connection to SW that lets an internal 70 Ω precharge MOSFET charge the BST capacitor for 265 ns each cycle before on-time; PRE to GND is limited to 45 V."
      },
      {
        "number": "20",
        "name": "BST",
        "type": "input",
        "description": "Bootstrap boost input; a 0.022 µF ceramic capacitor between BST and SW is recommended, and BST to SW is limited 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: Pin 6 (COMP) has no type in Table 4-1; typed as output because the table describes it as the interna; Table 4-1 lists SYNC (pin 5) as an input, but the text says it is an oscillator sync input or output; Table 4-1 lists PRE (pin 19) as an input, but the text describes it as an open-drain output connecte",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 27,
        "cost_usd": 0.1401,
        "at": "2026-10-08T12:55:08"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm25576",
        "pages": 37,
        "sha256": "ed0031dc76d29d88",
        "source_tier": "lcsc"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "lm25576mh.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e88c477efc8a1a4516124a51e2d33c396b12f0cc2e0fd28ec5223405d52862bd",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm25576mh-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5d1e176a053d8dc0252ef606c6ae955c60ebdb63daa0601de754842a2e1a3d4",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}