BQ25505RGRT

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq25505rgrt",
  "title": "BQ25505RGRT",
  "brief": "Texas Instruments Pre-ordered Chips, VQFN-20-EP(3.5x3.5). 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",
    "interface ics",
    "bq25505rgrt",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BQ25505RGRT",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-20-EP(3.5x3.5)",
    "pin_count": 21,
    "category": "Interface ICs",
    "subcategory": "Pre-ordered Chips",
    "datasheet": "https://www.ti.com/cn/lit/gpn/bq25505",
    "parts": {
      "symbol": "bq25505rgrt.kicad_sym",
      "footprint": "bq25505rgrt.kicad_mod",
      "model_3d": "bq25505rgrt-hero.glb",
      "model_3d_plain": "bq25505rgrt-etched.glb",
      "model_3d_step": "bq25505rgrt-etched.step",
      "model_3d_step_plain": "bq25505rgrt.step",
      "lbr": "bq25505rgrt.lbr"
    },
    "distributor_links": {
      "lcsc": "C2876730",
      "digikey": "296-39553-2-ND",
      "mouser": "595-BQ25505RGRT"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T11:35:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-39553-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-BQ25505RGRT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VSS",
        "type": "power_in",
        "description": "General ground connection for the device; place the VIN_DC capacitor (at least 4.7 µF) and VSTOR capacitors close to this pin."
      },
      {
        "number": "2",
        "name": "VIN_DC",
        "type": "input",
        "description": "DC voltage input from energy harvesters (0.1 V to 5.1 V recommended); connect at least a 4.7-µF capacitor as close as possible between this pin and pin 1."
      },
      {
        "number": "3",
        "name": "VOC_SAMP",
        "type": "input",
        "description": "Sampling pin for the MPPT network; connect to VSTOR to sample at 80% of input source open-circuit voltage, to GND for 50%, or to the mid-point of an external divider between VIN_DC and GND."
      },
      {
        "number": "4",
        "name": "VREF_SAMP",
        "type": "passive",
        "description": "Connect a 0.01-µF low-leakage capacitor from this pin to GND to store the voltage to which VIN_DC will be regulated, provided by the MPPT sample circuit."
      },
      {
        "number": "5",
        "name": "EN",
        "type": "input",
        "description": "Active-low digital programming input for enabling/disabling the IC; connect to GND to enable the IC."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal function; datasheet says to connect to VSS via the IC's PowerPad."
      },
      {
        "number": "7",
        "name": "VBAT_OV",
        "type": "input",
        "description": "Connect to the mid-point of the external resistor divider between VRDIV and GND for setting the VSTOR = VBAT_SEC overvoltage threshold."
      },
      {
        "number": "8",
        "name": "VRDIV",
        "type": "output",
        "description": "Biasing voltage to which the high side of the resistor divider networks is connected."
      },
      {
        "number": "9",
        "name": "VB_SEC_ON",
        "type": "output",
        "description": "Active-low push-pull driver for the secondary (rechargeable) energy storage PMOS FET; leave floating if not used."
      },
      {
        "number": "10",
        "name": "VB_PRI_ON",
        "type": "output",
        "description": "Active-low push-pull driver for the primary (nonrechargeable) energy storage PMOS FET; leave floating if not used."
      },
      {
        "number": "11",
        "name": "OK_HYST",
        "type": "input",
        "description": "Connect to the mid-point of the external resistor divider between VRDIV and GND for setting the VBAT_OK hysteresis threshold; connect to GND if not used."
      },
      {
        "number": "12",
        "name": "OK_PROG",
        "type": "input",
        "description": "Connect to the mid-point of the external resistor divider between VRDIV and GND for setting the VBAT_OK threshold; connect to GND if not used."
      },
      {
        "number": "13",
        "name": "VBAT_OK",
        "type": "output",
        "description": "Digital battery-good indicator output, internally referenced to the VSTOR voltage; leave floating if not used."
      },
      {
        "number": "14",
        "name": "VBAT_PRI",
        "type": "input",
        "description": "Primary (nonrechargeable) energy storage element high-impedance sense input; leave floating if not used."
      },
      {
        "number": "15",
        "name": "VSS",
        "type": "power_in",
        "description": "Signal ground connection for the device."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal function; datasheet says to connect to ground using the IC's PowerPad."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal function; datasheet says to connect to ground using the IC's PowerPad."
      },
      {
        "number": "18",
        "name": "VBAT_SEC",
        "type": "bidirectional",
        "description": "Connect a secondary (rechargeable) storage element with at least 100 µF of equivalent capacitance to this pin (2 V to 5.5 V battery range)."
      },
      {
        "number": "19",
        "name": "VSTOR",
        "type": "power_out",
        "description": "Output of the boost charger, typically connected to the system load; connect at least a 4.7-µF capacitor in parallel with a 0.1-µF capacitor close to this pin and pin 1 (VSS)."
      },
      {
        "number": "20",
        "name": "LBOOST",
        "type": "passive",
        "description": "Inductor connection for the boost charger switching node; connect a 22-µH inductor between this pin and pin 2 (VIN_DC)."
      },
      {
        "number": "21",
        "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: The pin configuration page is titled 'RGT Package, 20 Pins', but the orderable BQ25505RGRT is listed; The exposed thermal pad has no pin number in the datasheet and is not listed in the pin table. It is; NC pins 6, 16 and 17 are listed as 'Input' in the pin table, with a note to connect them to ground v"
        ],
        "pages_sent": 9,
        "cost_usd": 0.1375,
        "at": "2026-10-23T11:35:17"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/bq25505",
        "pages": 39,
        "sha256": "dd46bc016c8753e7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bq25505rgrt.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.52,
          3.52,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "0483500f933e67103c5dad386ed37b3c2ee4271094bc948d7c5282e033c2e69f",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bq25505rgrt-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.52,
          3.52,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1262d776b76649702fba91347c7210d7888b27ff2490ef71c8530c66e1d7655f",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-20-EP(3.5x3.5)",
      "Category": "Interface ICs",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "dd46bc016c8753e707a76a0fbd41685e46c479969b779f64ef4b3375a6ea26ce",
      "rows": [
        {
          "name": "DC input voltage into VIN_DC",
          "symbol": "VIN(DC)",
          "kind": "electrical",
          "unit": "mV",
          "min": 100,
          "typ": null,
          "max": 5100,
          "conditions": "Cold-start completed",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Cycle-by-cycle current limit of charger",
          "symbol": "ICHG(CBC_LIM)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 230,
          "max": 285,
          "conditions": "0.5V < VIN < 4.0 V; VSTOR = 4.2 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Input power range for normal charging",
          "symbol": "PIN",
          "kind": "electrical",
          "unit": "mW",
          "min": 0.005,
          "typ": null,
          "max": 510,
          "conditions": "VBAT_OV > VSTOR > VSTOR_CHGEN",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Minimum input voltage for cold start",
          "symbol": "VIN(CS)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 600,
          "max": 700,
          "conditions": "VBAT_SEC < VBAT_UV; VSTOR = 0 V; 0°C < TA < 85°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VSTOR when cold start ends",
          "symbol": "VSTOR_CHGEN",
          "kind": "electrical",
          "unit": "V",
          "min": 1.6,
          "typ": 1.73,
          "max": 1.9,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current, full operating mode",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 325,
          "max": 400,
          "conditions": "EN = GND; VIN_DC = 0V; VSTOR = 2.1V; TJ = 25°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current, full operating mode over temperature",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 700,
          "conditions": "EN = GND; VIN_DC = 0V; VSTOR = 2.1V; –40°C < TJ < 85°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current, ship mode",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 1,
          "max": 5,
          "conditions": "EN = VBAT_SEC; VBAT_SEC = VBAT_PRI = 2.1 V; TJ = 25°C; VSTOR = VIN_DC = 0 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current, ship mode over temperature",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "EN = VBAT_SEC; –40°C < TJ < 85°C; VSTOR = VIN_DC = 0 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VBAT_PRI leakage, ship mode",
          "symbol": "I-BATPRI(LEAK)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 1,
          "max": 5,
          "conditions": "EN = VBAT_SEC; VBAT_PRI = VBAT_SEC = 2.1 V; TJ = 25°C; VIN_DC = 0 V; VSTOR floating",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "VBAT_PRI leakage, ship mode over temperature",
          "symbol": "I-BATPRI(LEAK)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "–40°C < TJ < 85°C; VIN_DC = 0 V; VSTOR floating",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "ON resistance of switch between VBAT_SEC and VSTOR",
          "symbol": "RDS(ON)-BAT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.95,
          "max": 1.5,
          "conditions": "VBAT_SEC = 4.2 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Charger low-side switch ON resistance",
          "symbol": "RDS(ON)_CHG",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.7,
          "max": 0.9,
          "conditions": "VBAT_SEC = 4.2 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Charger high-side switch ON resistance",
          "symbol": "RDS(ON)_CHG",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 2.3,
          "max": 3,
          "conditions": "VBAT_SEC = 4.2 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Charger low-side switch ON resistance",
          "symbol": "RDS(ON)_CHG",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.8,
          "max": 1,
          "conditions": "VBAT_SEC = 2.1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Charger high-side switch ON resistance",
          "symbol": "RDS(ON)_CHG",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 3.7,
          "max": 4.8,
          "conditions": "VBAT_SEC = 2.1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Programmable overvoltage threshold range",
          "symbol": "VBAT_OV",
          "kind": "electrical",
          "unit": "V",
          "min": 2.2,
          "typ": null,
          "max": 5.5,
          "conditions": "VBAT_SEC increasing",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Battery overvoltage hysteresis",
          "symbol": "VBAT_OV_HYST",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 24,
          "max": 45,
          "conditions": "VBAT_SEC decreasing; VBAT_OV = 5.25V",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage threshold",
          "symbol": "VBAT_UV",
          "kind": "electrical",
          "unit": "V",
          "min": 1.91,
          "typ": 1.95,
          "max": 2,
          "conditions": "VBAT_SEC decreasing",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Battery undervoltage hysteresis",
          "symbol": "VBAT_UV_HYST",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 15,
          "max": 32,
          "conditions": "VBAT_SEC increasing",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Overall accuracy for VBAT_OV, VBAT_OK thresholds",
          "symbol": "VBAT_ACCURACY",
          "kind": "electrical",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "Selected resistors are 0.1% tolerance",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Regulation of VIN_DC during charging",
          "symbol": "VIN_REG",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "0.5 V < VIN < 4 V; IIN(DC) = 10 mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Internal reference for programmable thresholds",
          "symbol": "VBIAS",
          "kind": "electrical",
          "unit": "V",
          "min": 1.205,
          "typ": 1.21,
          "max": 1.217,
          "conditions": "VSTOR ≥ VSTOR_CHGEN",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Dead time between VB_SEC_ON and VB_PRI_ON",
          "symbol": "tDEAD",
          "kind": "timing",
          "unit": "us",
          "min": null,
          "typ": 5,
          "max": 8,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Minimum cold-start input power",
          "symbol": "PIN(CS)",
          "kind": "electrical",
          "unit": "µW",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "VSTOR < VSTOR(CHGEN) and VIN_DC clamped to VIN(CS); VBAT with 100 µF ceramic capacitor",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Battery hot plug switch time",
          "symbol": "tBAT_HOT_PLUG",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "Battery resistance = 300 Ω, Battery voltage = 3.3V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum charger switching frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown junction temperature",
          "symbol": "TTEMP_SD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 125,
          "max": null,
          "conditions": "VBAT_OV > VSTOR > 1.8V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Time period between two MPPT samples",
          "symbol": "VOC_SAMPLE",
          "kind": "timing",
          "unit": "s",
          "min": null,
          "typ": 16,
          "max": null,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Settling time for MPPT sample",
          "symbol": "VOC_STLG",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 256,
          "max": null,
          "conditions": "Device not switching",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "VBAT_OK low threshold voltage",
          "symbol": "VBAT_OK(L)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "Load = 10 µA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "EN low voltage",
          "symbol": "EN(L)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VBAT_SEC = 4.2V",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "MPPT_50 voltage on VOC_SAMP",
          "symbol": "MPPT_50",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (all listed pins)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "VIN_DC, VOC_SAMP, VREF_SAMP, VBAT_OV, VB_PRI_ON, VB_SEC_ON, VBAT_PRI, VBAT_SEC, VRDIV, OK_HYST, OK_PROG, VBAT_OK, VSTOR, LBST",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Peak input power",
          "symbol": "PIN_PK",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 510,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2000,
          "typ": null,
          "max": 2000,
          "conditions": "Human body model per ANSI/ESDA/JEDEC JS-001",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "ESD CDM",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -500,
          "typ": null,
          "max": 500,
          "conditions": "Charged device model per JESD22-C101",
          "source_page": 6,
          "source": "datasheet"
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