TPS51221RTVR

{
  "slug": "tps51221rtvr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, WQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tps51221rtvr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tps51221rtvr.kicad_sym",
    "tps51221rtvr.kicad_mod",
    "tps51221rtvr.glb",
    "tps51221rtvr.step",
    "tps51221rtvr.lbr",
    "docs/hero.png",
    "docs/tps51221rtvr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tps51221rtvr-hero.glb",
    "tps51221rtvr-hero.overlay.json"
  ],
  "component": {
    "mpn": "TPS51221RTVR",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tps51221",
    "parts": {
      "symbol": "tps51221rtvr.kicad_sym",
      "footprint": "tps51221rtvr.kicad_mod",
      "model_3d": "tps51221rtvr-hero.glb",
      "model_3d_plain": "tps51221rtvr.glb",
      "model_3d_step": "tps51221rtvr-etched.step",
      "model_3d_step_plain": "tps51221rtvr.step",
      "lbr": "tps51221rtvr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2860696",
      "digikey": "296-22888-2-ND",
      "mouser": "595-TPS51221RTVR"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T23:12:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-22888-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-TPS51221RTVR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DRVH1",
        "type": "output",
        "description": "Channel 1 high-side MOSFET gate driver output, source 1.7 Ω and sink 1.0 Ω, SW-node referenced floating driver whose drive voltage equals the VBST-to-SW voltage."
      },
      {
        "number": "2",
        "name": "V5SW",
        "type": "power_in",
        "description": "VREG5 switchover supply input; when EN1 is high, PGOOD1 indicates good and V5SW is above 4.8 V, VREG5 switches over to V5SW, with an absolute maximum range of -1 V to 7 V."
      },
      {
        "number": "3",
        "name": "RF",
        "type": "bidirectional",
        "description": "Frequency-setting pin, where a resistor to signal GND sets the switching frequency and an external clock can be connected for synchronization; absolute maximum range is -0.3 V to 7 V."
      },
      {
        "number": "4",
        "name": "EN1",
        "type": "input",
        "description": "Channel 1 SMPS enable pin, where greater than 0.55 V and less than 6 V turns it on or it may be left floating, connect to GND to disable it, and the soft-start capacitor attaches here."
      },
      {
        "number": "5",
        "name": "PGOOD1",
        "type": "output",
        "description": "Channel 1 power-good window comparator output, where the applied voltage must be less than 6 V and a pull-up resistor of 100 kΩ to 1 MΩ is recommended."
      },
      {
        "number": "6",
        "name": "SKIPSEL1",
        "type": "input",
        "description": "Channel 1 skip-mode selection pin, where GND selects continuous conduction, VREF2 selects auto skip, VREG3 selects OOA auto skip with maximum 7 skips (use below 400 kHz), and VREG5 selects OOA auto skip with maximum 15 skips (use above 400 kHz)."
      },
      {
        "number": "7",
        "name": "CSP1",
        "type": "bidirectional",
        "description": "Channel 1 current-sense comparator positive input, where an RC network with X5R or X7R ceramic capacitor extracts the DCR voltage drop and 0.1 µF is a good starting value."
      },
      {
        "number": "8",
        "name": "CSN1",
        "type": "input",
        "description": "Channel 1 current-sense comparator negative input, which also powers the current-sense circuit for output voltages of 5 V or higher and is used for output discharge."
      },
      {
        "number": "9",
        "name": "VFB1",
        "type": "input",
        "description": "Channel 1 SMPS feedback input, to which the feedback resistor divider connects, referenced to signal GND, with absolute maximum range -0.3 V to 7 V."
      },
      {
        "number": "10",
        "name": "COMP1",
        "type": "input",
        "description": "Channel 1 loop compensation pin (error amplifier output), where R and optionally C connect from this pin to VREF2 for current-mode loop compensation."
      },
      {
        "number": "11",
        "name": "IMON1",
        "type": "output",
        "description": "Channel 1 current monitor output, where an RC filter is recommended."
      },
      {
        "number": "12",
        "name": "EN",
        "type": "input",
        "description": "Enable pin for the VREF2 and VREG5 linear regulators, where greater than 1.2 V and less than 6 V turns them on and connecting to GND disables them."
      },
      {
        "number": "13",
        "name": "VREF2",
        "type": "output",
        "description": "2-V reference output, which must be bypassed to signal GND with a 0.22 µF ceramic capacitor."
      },
      {
        "number": "14",
        "name": "TRIP",
        "type": "input",
        "description": "Over-current trip level and discharge mode selection pin, where GND selects VOCL-ULV with discharge on, VREF2 selects VOCL-ULV with discharge off, VREG3 selects VOCL-LV with discharge off, and VREG5 selects VOCL-LV with discharge on."
      },
      {
        "number": "15",
        "name": "COMP2",
        "type": "input",
        "description": "Channel 2 loop compensation pin (error amplifier output), where R and optionally C connect from this pin to VREF2 for current-mode loop compensation."
      },
      {
        "number": "16",
        "name": "VFB2",
        "type": "input",
        "description": "Channel 2 SMPS feedback input, to which the feedback resistor divider connects, referenced to signal GND, with absolute maximum range -0.3 V to 7 V."
      },
      {
        "number": "17",
        "name": "CSN2",
        "type": "input",
        "description": "Channel 2 current-sense comparator negative input, which also powers the current-sense circuit for output voltages of 5 V or higher and is used for output discharge."
      },
      {
        "number": "18",
        "name": "CSP2",
        "type": "bidirectional",
        "description": "Channel 2 current-sense comparator positive input, where an RC network with X5R or X7R ceramic capacitor extracts the DCR voltage drop and 0.1 µF is a good starting value."
      },
      {
        "number": "19",
        "name": "SKIPSEL2",
        "type": "input",
        "description": "Channel 2 skip-mode selection pin, where GND selects continuous conduction, VREF2 selects auto skip, VREG3 selects OOA auto skip with maximum 7 skips (use below 400 kHz), and VREG5 selects OOA auto skip with maximum 15 skips (use above 400 kHz)."
      },
      {
        "number": "20",
        "name": "PGOOD2",
        "type": "output",
        "description": "Channel 2 power-good window comparator output, where the applied voltage must be less than 6 V and a pull-up resistor of 100 kΩ to 1 MΩ is recommended."
      },
      {
        "number": "21",
        "name": "EN2",
        "type": "input",
        "description": "Channel 2 SMPS enable pin, where greater than 0.55 V and less than 6 V turns it on or it may be left floating, connect to GND to disable it, and the soft-start capacitor attaches here."
      },
      {
        "number": "22",
        "name": "VREG3",
        "type": "power_out",
        "description": "Always-alive 3.3 V, 10 mA low-dropout linear regulator output, which runs from VIN or from VREG5 when switched over and must be bypassed to signal GND with more than 1 µF ceramic."
      },
      {
        "number": "23",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input for the 5 V and 3.3 V linear regulators, typically connected to VBAT, with absolute maximum range -0.3 V to 30 V."
      },
      {
        "number": "24",
        "name": "DRVH2",
        "type": "output",
        "description": "Channel 2 high-side MOSFET gate driver output, source 1.7 Ω and sink 1.0 Ω, SW-node referenced floating driver whose drive voltage equals the VBST-to-SW voltage."
      },
      {
        "number": "25",
        "name": "SW2",
        "type": "bidirectional",
        "description": "Channel 2 high-side MOSFET gate driver return, referenced to the switching node."
      },
      {
        "number": "26",
        "name": "VBST2",
        "type": "input",
        "description": "Boot-strap supply input for the channel 2 high-side driver, requiring a capacitor of 0.1 µF or greater from this pin to SW2, with an optional Schottky diode from VREG5 permitted."
      },
      {
        "number": "27",
        "name": "DRVL2",
        "type": "output",
        "description": "Channel 2 low-side MOSFET gate driver output, source 1.3 Ω and sink 0.7 Ω, GND-referenced driver."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "29",
        "name": "VREG5",
        "type": "power_out",
        "description": "5-V, 100-mA low-dropout linear regulator output, bypassed to power GND with a 10 µF ceramic capacitor, running from VIN and switching over to V5SW when 4.8 V or above is provided."
      },
      {
        "number": "30",
        "name": "DRVL1",
        "type": "output",
        "description": "Channel 1 low-side MOSFET gate driver output, source 1.3 Ω and sink 0.7 Ω, GND-referenced driver."
      },
      {
        "number": "31",
        "name": "VBST1",
        "type": "input",
        "description": "Boot-strap supply input for the channel 1 high-side driver, requiring a capacitor of 0.1 µF or greater from this pin to SW1, with an optional Schottky diode from VREG5 permitted."
      },
      {
        "number": "32",
        "name": "SW1",
        "type": "bidirectional",
        "description": "Channel 1 high-side MOSFET gate driver return, referenced to the switching node."
      },
      {
        "number": "33",
        "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 exposed thermal pad (PowerPAD) is mentioned in the datasheet but is not a numbered terminal in t; Pin numbers come from the Terminal Functions table on page 9, which was cross-checked against the to; The datasheet classifies CSP1, CSP2, SW1, SW2 and RF as I/O; they are mapped to KiCad bidirectional.",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0916,
        "at": "2026-10-08T23:11:43"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tps51221",
        "pages": 41,
        "sha256": "d3ac05277fe67fc8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "tps51221rtvr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          5.0,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps51221rtvr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "footprint_binding": "identity",
        "sha256": "f46bb8b4e37f8948e1332efcdf2e7ef9ee970d2ef2519764e7651ab362af6395",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}