TPS53681RSBR

{
  "slug": "tps53681rsbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Controllers, QFN-40-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "tps53681rsbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tps53681rsbr.kicad_sym",
    "tps53681rsbr.kicad_mod",
    "tps53681rsbr.glb",
    "tps53681rsbr.step",
    "tps53681rsbr.lbr",
    "docs/hero.png",
    "docs/tps53681rsbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tps53681rsbr-hero.glb",
    "tps53681rsbr-hero.overlay.json",
    "tps53681rsbr-etched.glb"
  ],
  "component": {
    "mpn": "TPS53681RSBR",
    "manufacturer": "Texas Instruments",
    "package": "QFN-40-EP(5x5)",
    "pin_count": 41,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tps53681",
    "parts": {
      "symbol": "tps53681rsbr.kicad_sym",
      "footprint": "tps53681rsbr.kicad_mod",
      "model_3d": "tps53681rsbr-hero.glb",
      "model_3d_plain": "tps53681rsbr-etched.glb",
      "model_3d_step": "tps53681rsbr-etched.step",
      "model_3d_step_plain": "tps53681rsbr.step",
      "lbr": "tps53681rsbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C702271",
      "digikey": "TPS53681RSBR-ND",
      "mouser": "595-TPS53681RSBR"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T12:40:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "TPS53681RSBR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-TPS53681RSBR",
        "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, based on 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 bi-directional 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 bi-directional ALERT pin interface (open drain)."
      },
      {
        "number": "12",
        "name": "AVR_RDY",
        "type": "output",
        "description": "Channel A power-good open-drain output requiring an external pull-up resistor; pulled low when a shutdown fault occurs."
      },
      {
        "number": "13",
        "name": "AVR_EN",
        "type": "input",
        "description": "Active-high enable input for channel A; re-cycling BVR_EN pin clears the faults of channel A per the datasheet."
      },
      {
        "number": "14",
        "name": "VR_HOT",
        "type": "output",
        "description": "Active-low external temperature indicator."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "bidirectional",
        "description": "Resets the output voltage to the BOOT voltage."
      },
      {
        "number": "16",
        "name": "BVR_RDY",
        "type": "output",
        "description": "Channel B power-good open-drain output requiring an external pull-up resistor; 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; re-cycling the pin clears the faults of channel B."
      },
      {
        "number": "21",
        "name": "AVSP",
        "type": "input",
        "description": "Positive input of the remote voltage sense of channel A."
      },
      {
        "number": "22",
        "name": "AVSN",
        "type": "input",
        "description": "Negative input of the remote voltage sense of channel A."
      },
      {
        "number": "23",
        "name": "ACSP1",
        "type": "input",
        "description": "Current sense input for channel A; connect to the IOUT pin of TI smart power stages."
      },
      {
        "number": "24",
        "name": "ACSP2",
        "type": "input",
        "description": "Current sense input for channel A; tie to V3P3 according to Table 1 to disable the phase."
      },
      {
        "number": "25",
        "name": "ACSP3",
        "type": "input",
        "description": "Current sense input for channel A; tie to V3P3 according to Table 1 to disable the phase."
      },
      {
        "number": "26",
        "name": "ACSP4",
        "type": "input",
        "description": "Current sense input for channel A; tie to V3P3 according to Table 1 to disable the phase."
      },
      {
        "number": "27",
        "name": "ACSP5",
        "type": "input",
        "description": "Current sense input for channel A; tie to V3P3 according to 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; connect to IOUT 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; connect to IOUT of smart power stages, tie to V3P3 according to Table 1 to disable the phase."
      },
      {
        "number": "30",
        "name": "BVSP",
        "type": "input",
        "description": "Positive input of the remote voltage sense of 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 of channel B; connect to GND if channel B is not used."
      },
      {
        "number": "32",
        "name": "BCSP1",
        "type": "input",
        "description": "Current sense input for channel B; connect to IOUT pins of TI smart power stages, or to GND if channel B is not used."
      },
      {
        "number": "33",
        "name": "VR_FAULT",
        "type": "output",
        "description": "Open-drain VR fault indicator for high-side FET short, over-voltage, over-temperature and input over-current; low on failure and puts the controller into latch-off mode."
      },
      {
        "number": "34",
        "name": "ADDR",
        "type": "input",
        "description": "Voltage divider to VREF and GND whose level sets the 7-bit PMBus address with an ADC, latched at 3.3-V power up."
      },
      {
        "number": "35",
        "name": "BTSEN",
        "type": "output",
        "description": "Connect to TAO pin of TI smart power stages of channel B to sense the highest power-stage temperature and built-in fault signal."
      },
      {
        "number": "36",
        "name": "ATSEN",
        "type": "output",
        "description": "Connect to TAO pin of TI smart power stages of channel A to sense the highest power-stage temperature and built-in fault signal."
      },
      {
        "number": "37",
        "name": "CSPIN",
        "type": "input",
        "description": "Input voltage from the positive terminal of the input current sensing shunt; short to VIN_CSNIN and connect to converter input voltage (example: 12 V) when not used."
      },
      {
        "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 sense shunt; short to CSPIN and connect to converter input (example: 12 V) when not used."
      },
      {
        "number": "39",
        "name": "V3P3",
        "type": "power_in",
        "description": "3.3-V power input for all digital logic circuits; bypass to GND with a ceramic capacitor of at least 1 µF."
      },
      {
        "number": "40",
        "name": "VREF",
        "type": "power_out",
        "description": "1.7-V LDO reference voltage; bypass to GND with 1-µF ceramic capacitor and connect to REFIN of TI smart power stages as 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-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet gives no pin number for the thermal pad; 'EP' is used as a placeholder.; ATSEN/BTSEN are listed as O in the datasheet pin table although they sense signals from the power st; AVR_EN description in the datasheet says re-cycling BVR_EN clears channel A faults (probable typo); "
        ],
        "pages_sent": 11,
        "cost_usd": 0.1624,
        "at": "2026-10-31T12:40:09"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tps53681",
        "pages": 131,
        "sha256": "1e01d86e076acf18",
        "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": "tps53681rsbr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "8f37bc7a9aab4742c34f137d9822c0352acc227532830034555744338483cdfc",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps53681rsbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6d53de929a8fa0c640c6f6b94866bb0241d892b4eba95179321f13503cbc5d14",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "RSB0040E",
      "source_page": 128,
      "D": {
        "nom_mm": 5.0,
        "range_mm": [
          4.9,
          5.1
        ]
      },
      "E1": {
        "nom_mm": 5.0,
        "range_mm": [
          4.9,
          5.1
        ]
      },
      "e": {
        "nom_mm": 0.4,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 0.8,
        "range_mm": [
          null,
          0.8
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "tps53681rsbr.step",
        "verdict": "PASS",
        "reasons": [
          "height within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}