LP873344RHDRQ1

{
  "schema_version": 1,
  "type": "component",
  "slug": "lp873344rhdrq1",
  "title": "LP873344RHDRQ1",
  "brief": "Texas Instruments DC-DC Converters, VQFN-28(5x5). 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)",
    "lp873344rhdrq1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LP873344RHDRQ1",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-28(5x5)",
    "pin_count": 29,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lp8733-q1",
    "parts": {
      "symbol": "lp873344rhdrq1.kicad_sym",
      "footprint": "lp873344rhdrq1.kicad_mod",
      "model_3d": "lp873344rhdrq1-hero.glb",
      "model_3d_plain": "lp873344rhdrq1.glb",
      "model_3d_step": "lp873344rhdrq1-etched.step",
      "model_3d_step_plain": "lp873344rhdrq1.step",
      "lbr": "lp873344rhdrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C3188955",
      "digikey": "296-LP873344RHDRQ1TR-ND",
      "mouser": "595-LP873344RHDRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T13:19:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LP873344RHDRQ1TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LP873344RHDRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VOUT_LDO0",
        "type": "power_out",
        "description": "LDO0 regulated output; leave the pin floating if LDO0 is not used."
      },
      {
        "number": "2",
        "name": "FB_B0",
        "type": "input",
        "description": "Positive output voltage feedback input for Buck 0."
      },
      {
        "number": "3",
        "name": "FB_B1",
        "type": "input",
        "description": "Positive output voltage feedback input for Buck 1 in two single-phase configuration, and negative output ground feedback for Buck 0 in dual-phase configuration."
      },
      {
        "number": "4",
        "name": "AGND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "5",
        "name": "VANA",
        "type": "power_in",
        "description": "Supply voltage for analog and digital blocks; must be connected to the same node as VIN_Bx (2.8 V to 5.5 V recommended operating range)."
      },
      {
        "number": "6",
        "name": "EN",
        "type": "input",
        "description": "Programmable enable signal for regulators and GPOs; leave floating if the pin is not used."
      },
      {
        "number": "7",
        "name": "VOUT_LDO1",
        "type": "power_out",
        "description": "LDO1 regulated output; leave the pin floating if LDO1 is not used."
      },
      {
        "number": "8",
        "name": "VIN_LDO1",
        "type": "power_in",
        "description": "Power input for LDO1 (2.5 V to 5.5 V recommended); connect to VANA if LDO1 is not used."
      },
      {
        "number": "9",
        "name": "nINT",
        "type": "output",
        "description": "Open-drain interrupt output, active LOW; connect to ground if the pin is not used."
      },
      {
        "number": "10",
        "name": "CLKIN",
        "type": "bidirectional",
        "description": "External clock input with alternative function general-purpose digital output GPO2; leave floating if not used."
      },
      {
        "number": "11",
        "name": "VIN_B1",
        "type": "power_in",
        "description": "Input for Buck 1; VIN_Bx pins are not connected together internally and must be connected together in the application and locally bypassed."
      },
      {
        "number": "12",
        "name": "VIN_B1",
        "type": "power_in",
        "description": "Input for Buck 1; VIN_Bx pins are not connected together internally and must be connected together in the application and locally bypassed."
      },
      {
        "number": "13",
        "name": "SW_B1",
        "type": "power_out",
        "description": "Buck 1 switch node; leave the pin floating if Buck 1 is not used."
      },
      {
        "number": "14",
        "name": "SW_B1",
        "type": "power_out",
        "description": "Buck 1 switch node; leave the pin floating if Buck 1 is not used."
      },
      {
        "number": "15",
        "name": "PGND_B1",
        "type": "power_in",
        "description": "Power ground for Buck 1."
      },
      {
        "number": "16",
        "name": "PGND_B1",
        "type": "power_in",
        "description": "Power ground for Buck 1."
      },
      {
        "number": "17",
        "name": "SCL",
        "type": "input",
        "description": "Serial interface clock input for I2C access; connect a pullup resistor, or connect to ground if the I2C interface is not used."
      },
      {
        "number": "18",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Serial interface data input and output for I2C access; connect a pullup resistor, or connect to ground if the I2C interface is not used."
      },
      {
        "number": "19",
        "name": "SGND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "20",
        "name": "PGND_B0",
        "type": "power_in",
        "description": "Power ground for Buck 0."
      },
      {
        "number": "21",
        "name": "PGND_B0",
        "type": "power_in",
        "description": "Power ground for Buck 0."
      },
      {
        "number": "22",
        "name": "SW_B0",
        "type": "power_out",
        "description": "Buck 0 switch node; leave the pin floating if Buck 0 is not used."
      },
      {
        "number": "23",
        "name": "SW_B0",
        "type": "power_out",
        "description": "Buck 0 switch node; leave the pin floating if Buck 0 is not used."
      },
      {
        "number": "24",
        "name": "VIN_B0",
        "type": "power_in",
        "description": "Input for Buck 0; VIN_Bx pins are not connected together internally and must be connected together in the application and locally bypassed."
      },
      {
        "number": "25",
        "name": "VIN_B0",
        "type": "power_in",
        "description": "Input for Buck 0; VIN_Bx pins are not connected together internally and must be connected together in the application and locally bypassed."
      },
      {
        "number": "26",
        "name": "GPO",
        "type": "output",
        "description": "General-purpose digital output; leave the pin floating if not used."
      },
      {
        "number": "27",
        "name": "PGOOD",
        "type": "output",
        "description": "Power-good indication signal; leave the pin floating if not used."
      },
      {
        "number": "28",
        "name": "VIN_LDO0",
        "type": "power_in",
        "description": "Power input for LDO0 (2.5 V to 5.5 V recommended); connect to VANA if LDO0 is not used."
      },
      {
        "number": "29",
        "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: The datasheet lists the RHD 28-pin VQFN thermal pad as a separate, unnumbered pad (table 'Thermal Pa; The pin table is in the LP8733-Q1 family datasheet (ZHCSIT1A). The ordering addendum on page 79 list",
          "exposed pad 29 added from the footprint"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0954,
        "at": "2026-10-11T13:19:05"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lp8733-q1",
        "pages": 87,
        "sha256": "5c54b6621e0847f2",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lp873344rhdrq1.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.92
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e9d6d740f505b03e5aa0ac826330f9e269344b84656d051f50eb07ac162749eb",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lp873344rhdrq1-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4bda7df59953d20465f51cfe4771c47c5017f0e4f280ec8e749da700943862fb",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-28(5x5)",
      "Category": "Power Management (PMIC)",
      "Pins": "29"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5c54b6621e0847f2",
      "rows": [
        {
          "name": "Voltage on power connections VIN_Bx, VANA (must use same input supply)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "Over operating free-air temperature range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on power connections VIN_LDOx",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "Over operating free-air temperature range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on buck switch nodes SW_Bx",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on buck voltage sense nodes FB_Bx",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on LDO output VOUT_LDOx",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on logic pins SDA, SCL, nINT, EN",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "Input or output pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on logic pins PGOOD, GPO, CLKIN (GPO2)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Input or output pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature TJ-MAX",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "Over operating free-air temperature range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature Tstg",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum lead temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 seconds",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range VIN_Bx, VANA",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.8,
          "typ": null,
          "max": 5.5,
          "conditions": "VIN_Bx and VANA must be connected to the same input supply",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on LDO inputs VIN_LDOx",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on logic pins EN, nINT",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "Input or output pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on logic input pin CLKIN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Input pin",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on logic output pins PGOOD, GPO, GPO2",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Output pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on I2C interface SCL, SDA",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 1.95,
          "conditions": "Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), High-Speed (3.4 MHz) modes",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on I2C interface SCL, SDA",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz) modes",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature TJ",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 140,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature TA",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Effective output filtering capacitance per phase COUT_BUCK",
          "symbol": "COUT_BUCK",
          "kind": "electrical",
          "unit": "µF",
          "min": 10,
          "typ": 22,
          "max": 500,
          "conditions": "Effective capacitance per phase",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output filtering capacitance for LDO regulators",
          "symbol": "COUT_LDO",
          "kind": "electrical",
          "unit": "µF",
          "min": 0.4,
          "typ": 1,
          "max": 2.7,
          "conditions": "Effective capacitance",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Inductance of the inductor (tolerance)",
          "symbol": "L",
          "kind": "tolerance",
          "unit": "%",
          "min": -30,
          "typ": null,
          "max": 30,
          "conditions": "Printed tolerance –30% / 30% of 0.47 µH",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range V(VIN_Bx), V(VANA)",
          "symbol": "V(VIN_Bx), V(VANA)",
          "kind": "electrical",
          "unit": "V",
          "min": 2.8,
          "typ": 3.7,
          "max": 5.5,
          "conditions": "VIN_Bx and VANA pins must be connected to the same supply line",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Buck output voltage programmable range",
          "symbol": "VOUT_Bx",
          "kind": "electrical",
          "unit": "V",
          "min": 0.7,
          "typ": 1,
          "max": 3.36,
          "conditions": "Programmable voltage range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "DC output voltage accuracy",
          "symbol": "VOUT_Bx_DC",
          "kind": "tolerance",
          "unit": "mV",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Force PWM mode, VOUT < 1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "DC output voltage accuracy",
          "symbol": "VOUT_Bx_DC",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "Force PWM mode, VOUT ≥ 1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "DC output voltage accuracy",
          "symbol": "VOUT_Bx_DC",
          "kind": "tolerance",
          "unit": "mV",
          "min": -20,
          "typ": null,
          "max": 40,
          "conditions": "PFM mode, VOUT < 1 V, the average output voltage level is increased by max. 20 mV",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Transient load step response, single-phase output",
          "symbol": "TLDSR",
          "kind": "tolerance",
          "unit": "mV",
          "min": -55,
          "typ": null,
          "max": 55,
          "conditions": "IOUT = 0.1 A to 2 A, TR = TF = 400 ns, PWM mode",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Transient load step response, dual-phase output",
          "symbol": "TLDSR",
          "kind": "tolerance",
          "unit": "mV",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "IOUT = 0.1 A to 4 A, TR = TF = 400 ns, PWM mode",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Forward current limit per phase programmable range",
          "symbol": "ILIM FWD",
          "kind": "electrical",
          "unit": "A",
          "min": 1.5,
          "typ": null,
          "max": 4,
          "conditions": "Programmable range",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Forward current limit accuracy",
          "symbol": "ILIM FWD",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": 7.5,
          "max": 20,
          "conditions": "V(VIN_Bx) ≥ 3 V, ILIM = 4 A",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Negative current limit per phase",
          "symbol": "ILIM NEG",
          "kind": "electrical",
          "unit": "A",
          "min": 1.6,
          "typ": 2,
          "max": 3,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "ƒSW",
          "kind": "electrical",
          "unit": "MHz",
          "min": 1.8,
          "typ": 2,
          "max": 2.2,
          "conditions": "PWM mode",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Overvoltage threshold for PGOOD and power-good interrupt (buck)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": 39,
          "typ": 50,
          "max": 64,
          "conditions": "V(VIN_Bx), V(VANA) fixed 3.7 V; compared to DC output voltage level VOUT_Bx_DC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage threshold for PGOOD and power-good interrupt (buck)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": -53,
          "typ": -40,
          "max": -29,
          "conditions": "V(VIN_Bx), V(VANA) fixed 3.7 V; compared to DC output voltage level VOUT_Bx_DC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Output pulldown resistance (buck)",
          "symbol": "RDIS_Bx",
          "kind": "electrical",
          "unit": "Ω",
          "min": 150,
          "typ": 250,
          "max": 350,
          "conditions": "Regulator disabled",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Buck short-circuit detection threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": 280,
          "typ": 360,
          "max": 440,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range for LDO power inputs VIN_LDOx",
          "symbol": "VIN_LDOx",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": 3.7,
          "max": 5.5,
          "conditions": "VIN_LDOx can be higher or lower than V(VANA)",
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