TPS51217DSCR

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  "slug": "tps51217dscr",
  "title": "TPS51217DSCR",
  "brief": "Texas Instruments DC-DC Controllers, WSON-10-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "TPS51217DSCR",
    "manufacturer": "Texas Instruments",
    "package": "WSON-10-EP(3x3)",
    "pin_count": 11,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tps51217",
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      "lbr": "tps51217dscr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658003",
      "digikey": "296-28856-2-ND",
      "mouser": "595-TPS51217DSCR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T07:34:48Z",
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    },
    "pins": [
      {
        "number": "1",
        "name": "PGOOD",
        "type": "output",
        "description": "Power-good window comparator open-drain output that needs a pull-up to 5 V or an appropriate signal voltage, with continuous current capability of 1 mA; it goes high 1 ms after VFB is within limits and goes low after a 2-µs delay when VFB leaves the limits."
      },
      {
        "number": "2",
        "name": "TRIP",
        "type": "input",
        "description": "Overcurrent-limit (OCL) detection threshold setting pin, which sources 10 µA at room temperature with a 4700 ppm/°C coefficient to set the OCL trip voltage for 0.2 V ≤ V(TRIP) ≤ 3 V."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "SMPS enable pin; short it to GND to disable the device, with enable threshold of 1.8 V and disable threshold of 0.5 V."
      },
      {
        "number": "4",
        "name": "VFB",
        "type": "input",
        "description": "SMPS feedback input to which the feedback resistor divider is connected, regulating to the 0.6 V internal reference."
      },
      {
        "number": "5",
        "name": "TRAN",
        "type": "input",
        "description": "Dynamic voltage change control pin that forces CCM and masks PGOOD, OVP and UVP when pulled up or pulled down, with masking ending 900 µs after TRAN returns to normal; leave it open when dynamic voltage change is not used."
      },
      {
        "number": "6",
        "name": "DRVL",
        "type": "output",
        "description": "Synchronous MOSFET driver output referenced to GND, with gate drive voltage defined by the V5IN voltage."
      },
      {
        "number": "7",
        "name": "V5IN",
        "type": "power_in",
        "description": "5 V supply input that accepts +30% / -10% variation (4.5 V to 6.5 V recommended operating range)."
      },
      {
        "number": "8",
        "name": "SW",
        "type": "input",
        "description": "Switch node that serves as the high-side MOSFET gate drive return and is also used for on-time generation and output discharge; SW may see -1 V to 28 V in recommended operation."
      },
      {
        "number": "9",
        "name": "DRVH",
        "type": "output",
        "description": "High-side MOSFET driver output referenced to the floating SW node, with gate drive voltage defined by the voltage across the VBST-to-SW bootstrap flying capacitor."
      },
      {
        "number": "10",
        "name": "VBST",
        "type": "input",
        "description": "Supply input for the high-side driver (bootstrap terminal) that connects to a flying capacitor to the SW pin and is internally connected to V5IN through the bootstrap MOSFET switch."
      },
      {
        "number": "11",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
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          "exposed pad 11 added from the footprint"
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        "at": "2026-10-11T07:34:33"
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        "pages": 30,
        "sha256": "570e4a6cca99822c",
        "source_tier": "lcsc"
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      "pins": {
        "total": 11,
        "described": 11,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "WSON-10-EP(3x3)",
      "Category": "Power Supply Chip",
      "Pins": "11"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Supply voltage V5IN",
          "symbol": "V5IN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBST voltage range",
          "symbol": "VBST",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 34.5,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "SW input voltage range",
          "symbol": "SW",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": 28,
          "conditions": "",
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        {
          "name": "SW input voltage range (transient)",
          "symbol": "SW(1)",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -4,
          "typ": null,
          "max": 28,
          "conditions": "This voltage should be applied for less than 30% of the repetitive period",
          "source_page": 3,
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        },
        {
          "name": "VBST voltage range (vs SW)",
          "symbol": "VBST(2)",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 6.5,
          "conditions": "Voltage values are with respect to the SW terminal",
          "source_page": 3,
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        },
        {
          "name": "EN, TRIP, VFB, TRAN voltage range",
          "symbol": "",
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          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 6.5,
          "conditions": "",
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        {
          "name": "DRVH output voltage range",
          "symbol": "DRVH",
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          "unit": "V",
          "min": -1,
          "typ": null,
          "max": 34.5,
          "conditions": "",
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        {
          "name": "DRVH output voltage range (transient)",
          "symbol": "DRVH(1)",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -4,
          "typ": null,
          "max": 34.5,
          "conditions": "This voltage should be applied for less than 30% of the repetitive period",
          "source_page": 3,
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        {
          "name": "DRVH output voltage range (vs SW)",
          "symbol": "DRVH(2)",
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          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 6.5,
          "conditions": "Voltage values are with respect to the SW terminal",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DRVL output voltage range",
          "symbol": "DRVL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PGOOD output voltage range",
          "symbol": "PGOOD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.1,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "VBST input voltage range",
          "symbol": "VBST",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 37,
          "conditions": "With respect to network ground",
          "source_page": 2,
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        {
          "name": "VBST voltage (vs SW)",
          "symbol": "VBST(3)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "With respect to SW terminal",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "SW input voltage range",
          "symbol": "SW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": 30,
          "conditions": "With respect to network ground",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "V5IN, EN, TRIP, VFB, TRAN input voltage range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "With respect to network ground",
          "source_page": 2,
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        {
          "name": "DRVH output voltage range",
          "symbol": "DRVH",
          "kind": "absolute_maximum",
          "unit": "V",
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          "typ": null,
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          "conditions": "With respect to network ground",
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        {
          "name": "DRVH output voltage (vs SW)",
          "symbol": "DRVH(3)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "With respect to SW terminal",
          "source_page": 2,
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        {
          "name": "DRVH output voltage, pulse width < 20 ns",
          "symbol": "DRVH",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2.5,
          "typ": null,
          "max": 7,
          "conditions": "Pulse width < 20 ns; with respect to SW terminal",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DRVL output voltage range",
          "symbol": "DRVL",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "DRVL output voltage, pulse width < 20 ns",
          "symbol": "DRVL",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2.5,
          "typ": null,
          "max": 7,
          "conditions": "Pulse width < 20 ns",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "PGOOD output voltage range",
          "symbol": "PGOOD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "V5IN supply current",
          "symbol": "I(V5IN)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 320,
          "max": 500,
          "conditions": "TA = 25°C, No Load, V(EN) = 5 V, V(VFB) = 0.63 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "V5IN shutdown current",
          "symbol": "ISD(V5IN)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "TA = 25°C, No Load, V(EN) = 0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VFB regulation voltage",
          "symbol": "V(VFB)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": 0.603,
          "max": 0.606,
          "conditions": "TA = 25°C, skip mode",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VFB regulation voltage",
          "symbol": "V(VFB)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.5974,
          "typ": 0.603,
          "max": 0.6086,
          "conditions": "TA = 0°C to 85°C, skip mode",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VFB regulation voltage",
          "symbol": "V(VFB)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.596,
          "typ": 0.603,
          "max": 0.61,
          "conditions": "TA = –40°C to 85°C, skip mode",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output discharge current from SW pin",
          "symbol": "IDischg",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 13,
          "conditions": "V(EN) = 0 V, V(SW) = 0.5 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DRVH resistance, source",
          "symbol": "R(DRVH)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 1.5,
          "max": 3,
          "conditions": "Source, I(DRVH) = –50 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DRVH resistance, sink",
          "symbol": "R(DRVH)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.7,
          "max": 1.8,
          "conditions": "Sink, I(DRVH) = 50 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DRVL resistance, source",
          "symbol": "R(DRVL)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 1,
          "max": 2.2,
          "conditions": "Source, I(DRVL) = –50 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DRVL resistance, sink",
          "symbol": "R(DRVL)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.5,
          "max": 1.2,
          "conditions": "Sink, I(DRVL) = 50 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dead time, DRVH-off to DRVL-on",
          "symbol": "tD",
          "kind": "electrical",
          "unit": "ns",
          "min": 7,
          "typ": 17,
          "max": 30,
          "conditions": "DRVH-off to DRVL-on",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Dead time, DRVL-off to DRVH-on",
          "symbol": "tD",
          "kind": "electrical",
          "unit": "ns",
          "min": 10,
          "typ": 22,
          "max": 35,
          "conditions": "DRVL-off to DRVH-on",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum off-time",
          "symbol": "tOFF(min)",
          "kind": "electrical",
          "unit": "ns",
          "min": 150,
          "typ": 260,
          "max": 400,
          "conditions": "TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 312,
          "typ": 340,
          "max": 368,
          "conditions": "TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PG threshold, PG in from lower",
          "symbol": "V(THPG)",
          "kind": "electrical",
          "unit": "%",
          "min": 92.5,
          "typ": 95,
          "max": 97.5,
          "conditions": "PG in from lower",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PG threshold, PG in from higher",
          "symbol": "V(THPG)",
          "kind": "electrical",
          "unit": "%",
          "min": 107.5,
          "typ": 110,
          "max": 112.5,
          "conditions": "PG in from higher",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PG delay",
          "symbol": "tPGDEL",
          "kind": "electrical",
          "unit": "ms",
          "min": 0.8,
          "typ": 1,
          "max": 1.2,
          "conditions": "Delay for PG in",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN enable voltage",
          "symbol": "V(EN)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.8,
          "typ": null,
          "max": null,
          "conditions": "Enable",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN disable voltage",
          "symbol": "V(EN)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Disable",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TRAN voltage, TRAN open",
          "symbol": "V(TRAN)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.83,
          "typ": 1.88,
          "max": 1.93,
          "conditions": "TRAN open",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TRAN voltage, mask PG/OVP/UVP high side",
          "symbol": "V(TRAN)",
          "kind": "electrical",
          "unit": "V",
          "min": 2.03,
          "typ": 2.08,
          "max": 2.13,
          "conditions": "Mask PG, OVP and UVP, high side",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TRAN voltage, mask PG/OVP/UVP low side",
          "symbol": "V(TRAN)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.62,
          "typ": 1.67,
          "max": 1.72,
          "conditions": "Mask PG, OVP and UVP, low side",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TRIP source current",
          "symbol": "I(TRIP)",
          "kind": "electrical",
          "unit": "µA",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "V(TRIP) = 1 V, TA = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current limit threshold",
          "symbol": "VOCL",
          "kind": "electrical",
          "unit": "mV",
          "min": 355,
          "typ": 375,
          "max": 395,
          "conditions": "V(TRIP) = 3 V",
          "source_page": 4,
          "source": "datasheet"
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