TPS53681RSBT

{
  "schema_version": 1,
  "type": "component",
  "slug": "tps53681rsbt",
  "title": "TPS53681RSBT",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, QFN-40-EP(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)",
    "tps53681rsbt",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TPS53681RSBT",
    "manufacturer": "Texas Instruments",
    "package": "QFN-40-EP(5x5)",
    "pin_count": 41,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tps53681.pdf",
    "parts": {
      "symbol": "tps53681rsbt.kicad_sym",
      "footprint": "tps53681rsbt.kicad_mod",
      "model_3d": "tps53681rsbt-hero.glb",
      "model_3d_plain": "tps53681rsbt-etched.glb",
      "model_3d_step": "tps53681rsbt-etched.step",
      "model_3d_step_plain": "tps53681rsbt.step",
      "lbr": "tps53681rsbt.lbr"
    },
    "distributor_links": {
      "lcsc": "C181498",
      "digikey": "296-47019-2-ND",
      "mouser": "595-TPS53681RSBT"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T21:18:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-47019-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-TPS53681RSBT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BPWM1",
        "type": "output",
        "description": "PWM signal for phase 1 of channel B."
      },
      {
        "number": "2",
        "name": "BPWM2",
        "type": "output",
        "description": "PWM signal for phase 2 of channel B."
      },
      {
        "number": "3",
        "name": "APWM6/BPWM3",
        "type": "output",
        "description": "PWM signal for phase 6 of channel A, or phase 3 of channel B, selected by the NVM option."
      },
      {
        "number": "4",
        "name": "APWM5",
        "type": "output",
        "description": "PWM signal for phase 5 of channel A."
      },
      {
        "number": "5",
        "name": "APWM4",
        "type": "output",
        "description": "PWM signal for phase 4 of channel A."
      },
      {
        "number": "6",
        "name": "APWM3",
        "type": "output",
        "description": "PWM signal for phase 3 of channel A."
      },
      {
        "number": "7",
        "name": "APWM2",
        "type": "output",
        "description": "PWM signal for phase 2 of channel A."
      },
      {
        "number": "8",
        "name": "APWM1",
        "type": "output",
        "description": "PWM signal for phase 1 of channel A."
      },
      {
        "number": "9",
        "name": "SMB_DIO",
        "type": "bidirectional",
        "description": "SMBus or I2C bidirectional serial data interface, open drain."
      },
      {
        "number": "10",
        "name": "SMB_CLK",
        "type": "input",
        "description": "SMBus or I2C serial clock interface, open drain."
      },
      {
        "number": "11",
        "name": "SMB_ALERT",
        "type": "bidirectional",
        "description": "SMBus or I2C bidirectional ALERT pin, open drain."
      },
      {
        "number": "12",
        "name": "AVR_RDY",
        "type": "output",
        "description": "Open-drain power-good output for channel A that requires an external pull-up resistor and is pulled low when a shutdown fault occurs."
      },
      {
        "number": "13",
        "name": "AVR_EN",
        "type": "input",
        "description": "Active-high enable input for channel A; asserting it activates channel A, and recycling BVR_EN clears channel A faults."
      },
      {
        "number": "14",
        "name": "VR_HOT",
        "type": "output",
        "description": "Active-low external temperature indicator output."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "bidirectional",
        "description": "Resets the output voltage to the BOOT voltage when the ASIC signals an out-of-range condition during AVS operation."
      },
      {
        "number": "16",
        "name": "BVR_RDY",
        "type": "output",
        "description": "Open-drain power-good output for channel B that requires an external pull-up resistor and is pulled low when a shutdown fault occurs."
      },
      {
        "number": "17",
        "name": "GND",
        "type": "power_in",
        "description": "Connect to GND."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Connect to GND."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "20",
        "name": "BVR_EN",
        "type": "input",
        "description": "Active-high enable input for channel B; asserting it activates channel B, and recycling BVR_EN clears channel B faults."
      },
      {
        "number": "21",
        "name": "AVSP",
        "type": "input",
        "description": "Positive input of the remote voltage sense for channel A."
      },
      {
        "number": "22",
        "name": "AVSN",
        "type": "input",
        "description": "Negative input of the remote voltage sense for channel A."
      },
      {
        "number": "23",
        "name": "ACSP1",
        "type": "input",
        "description": "Current sense input for channel A, connected to the IOUT pin of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "24",
        "name": "ACSP2",
        "type": "input",
        "description": "Current sense input for channel A, connected to the IOUT pin of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "25",
        "name": "ACSP3",
        "type": "input",
        "description": "Current sense input for channel A, connected to the IOUT pin of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "26",
        "name": "ACSP4",
        "type": "input",
        "description": "Current sense input for channel A, connected to the IOUT pin of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "27",
        "name": "ACSP5",
        "type": "input",
        "description": "Current sense input for channel A, connected to the IOUT pin of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "28",
        "name": "ACSP6/BCSP3",
        "type": "input",
        "description": "Current sense input for channel A or channel B based on NVM option, connected to the IOUT pin of smart power stages; tie to the 3.3-V supply to disable the phase."
      },
      {
        "number": "29",
        "name": "BCSP2",
        "type": "input",
        "description": "Current sense input for channel B, connected to the IOUT pins of TI smart power stages; tie to V3P3 per Table 1 to disable the phase."
      },
      {
        "number": "30",
        "name": "BVSP",
        "type": "input",
        "description": "Positive input of the remote voltage sense for channel B; connect to GND if channel B is not used."
      },
      {
        "number": "31",
        "name": "BVSN",
        "type": "input",
        "description": "Negative input of the remote voltage sense for channel B; connect to GND if channel B is not used."
      },
      {
        "number": "32",
        "name": "BCSP1",
        "type": "input",
        "description": "Current sense input for channel B, connected to the IOUT pins of TI smart power stages; connect to GND if channel B is not used."
      },
      {
        "number": "33",
        "name": "VR_FAULT",
        "type": "output",
        "description": "Open-drain VR fault indicator that goes LOW on high-side FET short, over-voltage, over-temperature or input over-current and latches the controller off."
      },
      {
        "number": "34",
        "name": "ADDR",
        "type": "input",
        "description": "Voltage divider to VREF and GND whose level sets the 7-bit PMBus address via ADC, latched at 3.3-V power-up."
      },
      {
        "number": "35",
        "name": "BTSEN",
        "type": "output",
        "description": "Connects to the TAO pin of channel B TI smart power stages to sense the highest power-stage temperature and the built-in fault signal."
      },
      {
        "number": "36",
        "name": "ATSEN",
        "type": "output",
        "description": "Connects to the TAO pin of channel A TI smart power stages to sense the highest power-stage temperature and the built-in fault signal."
      },
      {
        "number": "37",
        "name": "CSPIN",
        "type": "input",
        "description": "Positive terminal of the input current sensing shunt; when input current sensing is not used, short to VIN_CSNIN and connect to the converter input voltage."
      },
      {
        "number": "38",
        "name": "VIN_CSNIN",
        "type": "power_in",
        "description": "Input voltage sensing for on-time control and telemetry and negative terminal of the input current sensing shunt; short to CSPIN if input current sensing is not used."
      },
      {
        "number": "39",
        "name": "V3P3",
        "type": "power_in",
        "description": "3.3-V power input that powers all digital logic; bypass to GND with a ceramic capacitor of at least 1 µF."
      },
      {
        "number": "40",
        "name": "VREF",
        "type": "power_in",
        "description": "1.7-V LDO reference voltage; bypass to GND with 1 µF ceramic and connect to REFIN of TI smart power stages as the current sense common-mode voltage."
      },
      {
        "number": "41",
        "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: Package variant confirmed from the Package Option Addendum: TPS53681RSBT is sold in the RSB 40-pin W"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0332,
        "at": "2026-11-05T21:17:52"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tps53681.pdf",
        "pages": 131,
        "sha256": "91eb09650cc2e250",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tps53681rsbt.step",
        "role": "plain",
        "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": "8f37bc7a9aab4742c34f137d9822c0352acc227532830034555744338483cdfc",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps53681rsbt-etched.step",
        "role": "eda",
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        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "91cd4024807556d380e1eb858e232e1411f01f51349fadecb212047f40c7c153",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "QFN-40-EP(5x5)",
      "Category": "Power Management (PMIC)",
      "Pins": "41"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "91eb09650cc2e25031f1b79a3237fa0f42994fd93da4ca980bcaebec4ac37b9b",
      "rows": [
        {
          "name": "Input voltage CSPIN, VIN_CSNIN",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 19,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input voltage ACSP1-ACSP6/BCSP3, ADDR, ATSEN, AVR_EN, AVSP, BCSP1, BCSP2, BTSEN, BVR_EN, BVSP, RESET, SMB_CLK, SMB_DIO, V3P3",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Input voltage AGND, AVSN, BVSN",
          "symbol": "",
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          "min": -0.3,
          "typ": null,
          "max": 0.3,
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          "source": "datasheet"
        },
        {
          "name": "Output voltage APWM1-APWM6/BPWM3, BPWM1, BPWM2, AVR_RDY, BVR_RDY, SMB_ALERT, VREF, VR_FAULT, VR_HOT",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input voltage CSPIN, VIN_CSNIN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": 12,
          "max": 17,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "V3P3 supply voltage",
          "symbol": "V3P3",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.97,
          "typ": 3.3,
          "max": 3.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input voltage ACSP1-ACSP6/BSCP3, ADDR, ATSEN, AVR_EN, AVSP, BCSP1, BCSP2, BTSEN, BVR_EN, BVSP, RESET, SMB_CLK, SMB_DIO, V3P3",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 3.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input voltage AGND, AVSN, BVSN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 0.1,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output voltage VREF",
          "symbol": "VREF",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 1.72,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output voltage APWM1-APWM6/BPWM3, BPWM2, AVR_RDY, BPWM1, BVR_RDY, SMB_ALERT, VREF, VR_FAULT, VR_HOT",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 3.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "V3P3 supply current",
          "symbol": "IV3P3",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 13,
          "max": 18,
          "conditions": "VDAC < VSP < VDAC + 100mV, ENABLE = HI",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "V3P3 standby current",
          "symbol": "IV3P3SBY",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 9,
          "max": 13.5,
          "conditions": "ENABLE = LO",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "V3P3 normal range",
          "symbol": "V3NORMAL",
          "kind": "electrical",
          "unit": "V",
          "min": 2.97,
          "typ": null,
          "max": 3.5,
          "conditions": "Normal operation",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VREF output deeper sleep",
          "symbol": "VVREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.692,
          "typ": 1.7,
          "max": 1.708,
          "conditions": "2.97V ≤ VV3P3 ≤ 3.5 V, IVREF = 0 A",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Fixed overvoltage protection, Channel A",
          "symbol": "VOVPA",
          "kind": "electrical",
          "unit": "V",
          "min": 2.75,
          "typ": 2.8,
          "max": 2.86,
          "conditions": "VAVSP > VOVP for 1 µs, ENABLE = HI or LO, PWM to LO",
          "source_page": 22,
          "source": "datasheet"
        },
        {
          "name": "Fixed overvoltage protection, Channel B",
          "symbol": "VOVPB",
          "kind": "electrical",
          "unit": "V",
          "min": 1.85,
          "typ": 1.9,
          "max": 1.95,
          "conditions": "VBVSP > VOVP for 1 µs, ENABLE = HI or LO, PWM to LO",
          "source_page": 22,
          "source": "datasheet"
        },
        {
          "name": "VREAD_VOUT accuracy",
          "symbol": "VREAD_VOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": -12,
          "typ": null,
          "max": 12,
          "conditions": "5 mV DAC: 0.25 V ≤ VVSP ≤ 1.52 V; 10 mV DAC: 0.5 ≤ VVSP ≤ 2.4 V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "READ_VIN accuracy",
          "symbol": "VREAD_VIN",
          "kind": "electrical",
          "unit": "%",
          "min": -2.25,
          "typ": null,
          "max": 2.25,
          "conditions": "4.50 V ≤ VIN ≤ 17 V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Temp READ_TEMP1 accuracy",
          "symbol": "Temp",
          "kind": "electrical",
          "unit": "°C",
          "min": -2,
          "typ": 0,
          "max": 2,
          "conditions": "0.28 V (–40°C) ≤ TSEN ≤ 1.8 V (150°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "IIN READ_IIN accuracy",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "%",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "(VCSPIN – VCSNIN) = 2.5 mV, IIN = 5 A, RSENSE = 0.5 mΩ",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "TSEN leakage current",
          "symbol": "ITSEN",
          "kind": "electrical",
          "unit": "µA",
          "min": -3,
          "typ": null,
          "max": 3,
          "conditions": "",
          "source_page": 22,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 360,
          "typ": 400,
          "max": 440,
          "conditions": "FREQUENCY_SWITCH = 0x0190, VIN = 12 V, VAVSP = 1.0 V, VBVSP = 0.8 V, TA = 25°C",
          "source_page": 19,
          "source": "datasheet"
        },
        {
          "name": "Channel A startup time",
          "symbol": "tSTARTUPA",
          "kind": "timing",
          "unit": "ms",
          "min": 0.38,
          "typ": 0.48,
          "max": 0.58,
          "conditions": "VVBOOT > 0 V, no faults, CREF = 1 µF, TON_DELAY = 0xB1EC (PAGE 0)",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 34.1,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case (top) thermal resistance",
          "symbol": "RθJC(top)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 16.6,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 5.8,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-top characterization parameter",
          "symbol": "ψJT",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "",
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