LMR51430

{
  "schema_version": 1,
  "type": "component",
  "slug": "lmr51430",
  "title": "LMR51430",
  "brief": "TI 3 A synchronous step-down converter, SOT-23-6. 4-36 V in, integrated FETs, small solution. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power",
    "buck-converter",
    "switching-regulator",
    "dc-dc",
    "sot-23-6",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LMR51430",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Power Management",
    "subcategory": "Switching regulator (buck)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lmr51430.pdf",
    "parts": {
      "symbol": "lmr51430.kicad_sym",
      "footprint": "lmr51430.kicad_mod",
      "model_3d": "lmr51430-etched.glb",
      "model_3d_plain": "lmr51430.glb",
      "model_3d_step": "lmr51430-etched.step",
      "model_3d_step_plain": "lmr51430.step",
      "lbr": "lmr51430.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground terminal. Connects to the source of the low-side FET internally. Connect to system ground and the ground side of CIN and COUT; the path to CIN must be as short as possible."
      },
      {
        "number": "2",
        "name": "SW",
        "type": "power_out",
        "description": "Switching output of the converter. Connects internally to the source of the high-side FET and drain of the low-side FET. Connect this pin to the power inductor. Rated -0.3 V to 38 V DC (transient -3.0 V for < 20 ns)."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input terminal to internal bias LDO and high-side FET. Operating range 4.5 V to 36 V (abs max 38 V). Input bypass capacitors CIN must be directly connected between this pin and GND."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the converter. Connect a resistor divider from VOUT to set the output voltage; internal reference is 0.6 V typical (0.591 V to 0.609 V). Never short this pin to ground during operation."
      },
      {
        "number": "5",
        "name": "EN",
        "type": "input",
        "description": "Precision enable input. Do not float. High = on, low = off. Rising threshold ~1.227 V, falling ~1.08 V. Can be tied to VIN or used with an external divider to set adjustable UVLO. If left floating, the device is disabled."
      },
      {
        "number": "6",
        "name": "CB",
        "type": "passive",
        "description": "Bootstrap capacitor connection for the high-side FET driver. Connect a high-quality 100-nF capacitor from this pin to the SW pin. CB to SW rated max 5.5 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lmr51430.pdf",
        "pages": 33,
        "sha256": "f7d8053844fb07ae",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lmr51430.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lmr51430-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ec9b533e13424cbdd3818b3800583cc1d60d31717566ff98c174af52b0d881b9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Synchronous step-down converter",
      "Input": "4-36 V",
      "Output current": "3 A",
      "Integrated FETs": "Yes (high + low side)",
      "Control": "FB divider, EN, bootstrap (CB)",
      "Package": "SOT-23-6"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lmr51430",
    "3a buck converter",
    "36v step down",
    "small synchronous buck"
  ],
  "discovery_pitch": "TI LMR51430 3 A synchronous step-down converter (SOT-23-6) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lmr51430.kicad_sym",
    "lmr51430.kicad_mod",
    "lmr51430.glb",
    "lmr51430.step",
    "lmr51430.lbr",
    "docs/hero.png",
    "docs/lmr51430-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmr51430-etched.step"
  ],
  "variants": [
    {
      "mpn": "LMR51430XDBVR (SOT-23-6, FPWM)",
      "kind": "packaging"
    },
    {
      "mpn": "LMR51430YDBVR (SOT-23-6, auto mode)",
      "kind": "packaging"
    }
  ]
}