component
TPS53681RSBT
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, QFN-40-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"slug": "tps53681rsbt",
"version": "0.1.0",
"type": "component",
"description": "Texas Instruments AC-DC Controllers And Regulators, QFN-40-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
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"power management (pmic)",
"tps53681rsbt",
"factory-2.0.0",
"extractor-text"
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"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",
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"model_3d_step_plain": "tps53681rsbt.step",
"lbr": "tps53681rsbt.lbr"
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"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",
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"pn": "296-47019-2-ND",
"status": "found"
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"pn": "595-TPS53681RSBT",
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},
"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": {
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"footprint_binding": "identity",
"sha256": "8f37bc7a9aab4742c34f137d9822c0352acc227532830034555744338483cdfc",
"checked": "2026-11-05",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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"role": "eda",
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}