MP3437GJ-Z

{
  "schema_version": 1,
  "type": "component",
  "slug": "mp3437gj-z",
  "title": "MP3437GJ-Z",
  "brief": "Monolithic Power Systems DC-DC Converters, TSOT-23-8. 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",
    "power management (pmic)",
    "mp3437gj-z",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MP3437GJ-Z",
    "manufacturer": "Monolithic Power Systems",
    "package": "TSOT-23-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600558807730692096",
    "parts": {
      "symbol": "mp3437gj-z.kicad_sym",
      "footprint": "mp3437gj-z.kicad_mod",
      "model_3d": "mp3437gj-z-hero.glb",
      "model_3d_plain": "mp3437gj-z-etched.glb",
      "model_3d_step": "mp3437gj-z-etched.step",
      "model_3d_step_plain": "mp3437gj-z.step",
      "lbr": "mp3437gj-z.lbr"
    },
    "distributor_links": {
      "lcsc": "C5776148"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T09:06:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap pin; a capacitor between BST and SW powers the synchronous high-side MOSFET (absolute maximum BST is VSW + 4.5V)."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Output pin connected to the drain of the high-side MOSFET (HS-FET); it powers VDD when VOUT is above VIN and VIN is below 3.4V (absolute maximum -0.3V to +18V)."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "passive",
        "description": "Converter switch pin connected to the drain of the low-side MOSFET and the source of the high-side MOSFET; connect the power inductor to SW (absolute maximum -0.3V to +18V, -5V for under 10ns)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; the datasheet recommends connecting the analog signal close to this GND pin."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input; connect a resistor divider from the VOUT pin to the FB pin (absolute maximum -0.3V to +4.5V)."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_out",
        "description": "Internal bias supply that must be decoupled with a 4.7µF ceramic capacitor as close to the pin as possible; the regulator from VIN to VOUT is disabled if the bias voltage exceeds 3.4V, and the maximum external VDD bias is 3.6V."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Chip enable control that programs VIN's under-voltage lockout; it must not be floated and must be pulled up or down externally, and connecting it to VIN gives automatic start-up (absolute maximum -0.3V to +18V)."
      },
      {
        "number": "8",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply that must be bypassed locally and supplied above 2.7V during start-up to provide enough voltage to VDD (operation range 0.8V to 16V, absolute maximum -0.3V to +18V)."
      }
    ],
    "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: Pin numbers and names are taken from the PIN FUNCTIONS table (page 3), which lists the TSOT23-8 pin ; KiCad ERC type for VDD (power_out), SW (passive) and BST (passive) are judgment calls, since the dat; The QFN-10 pin 4 and 5 both map to TSOT23-8 pin 4 (GND); only pin 4 is listed here for the TSOT pack"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0399,
        "at": "2026-10-18T09:05:55"
      },
      "datasheet": {
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        "pages": 27,
        "sha256": "9dd3a7e86130a89a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "mp3437gj-z.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dc644a91883054d8f75e38542e63c2050dc8f2e8b7f12e1c57dcd93245fbd473",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mp3437gj-z-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6ee3bf4317a0d7fa7d25139895b13d4aca7c57a50277cb9bf457775a59fa2ef0",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Monolithic Power Systems",
      "Package": "TSOT-23-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "appearance": {
      "contacts": {
        "quote": "package, connect the SW pin on the top PCB layer using the copper that is under the IC",
        "page": 22,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "9dd3a7e86130a89abaaf61c73c445ea2b396b1021bff6fc0b211daafc47fdf9b"
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    "characteristics": {
      "version": 1,
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      "rows": [
        {
          "name": "SW pin voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SW pin voltage transient",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": 22,
          "conditions": "<10ns",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN, EN, MODE, VOUT pin voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BST pin voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "max = VSW + 4.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "All other pins voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "HS-FET body diode inrush current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "during input start-up (note 2)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Continuous power dissipation TSOT23-8",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2.4,
          "conditions": "TA = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD human body model",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "HBM",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD charged device model",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 750,
          "conditions": "CDM",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Start-up input voltage",
          "symbol": "VST",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 16,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operation input voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0.8,
          "typ": null,
          "max": 16,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Startup input voltage with VDD bias",
          "symbol": "VST2",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0.95,
          "typ": null,
          "max": 16,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum external VDD bias voltage",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Boost output voltage",
          "symbol": "VOUT",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 16,
          "conditions": "minimum is VIN (expression as printed)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Start-up input voltage",
          "symbol": "VST",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 16,
          "conditions": "No VDD bias",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Start-up input voltage",
          "symbol": "VST",
          "kind": "electrical",
          "unit": "V",
          "min": 0.95,
          "typ": null,
          "max": 16,
          "conditions": "VDD = 3V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating input voltage",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": null,
          "max": 16,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating VDD voltage",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 2.3,
          "typ": 2.6,
          "max": null,
          "conditions": "VIN = 2.7V, 0mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VDD under-voltage lockout rising threshold",
          "symbol": "VDDUVLO_R",
          "kind": "electrical",
          "unit": "V",
          "min": 2.2,
          "typ": 2.4,
          "max": 2.6,
          "conditions": "VDD rising",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VDD UVLO falling threshold",
          "symbol": "VDDUVLO_F",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": 2.2,
          "max": 2.4,
          "conditions": "VDD falling",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current (measured on VIN)",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 3,
          "max": 6,
          "conditions": "VFB = 1.05V, VIN = 3V, VOUT = 8V, no switching, measured on VIN",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current (measured on VOUT)",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 380,
          "max": 500,
          "conditions": "VFB = 1.05V, VIN = 3V, VOUT = 8V, no switching, measured on VOUT",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current in pass-through mode",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 430,
          "max": 550,
          "conditions": "VFB = 1.05V, VIN = 9V, VOUT floating, PSM, pass-through mode, measured on VIN",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN turn-on voltage threshold",
          "symbol": "VEN_ON",
          "kind": "electrical",
          "unit": "V",
          "min": 1.15,
          "typ": 1.23,
          "max": 1.31,
          "conditions": "VEN rising (switching)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN turn-on hysteresis",
          "symbol": "IEN_HYS",
          "kind": "electrical",
          "unit": "μA",
          "min": 3.5,
          "typ": 5,
          "max": 6.5,
          "conditions": "1.0V < EN < VEN_ON",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 500,
          "typ": 600,
          "max": 700,
          "conditions": "VIN = 3.3V, VOUT = 8V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "FB reference voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 0.99,
          "typ": 1,
          "max": 1.01,
          "conditions": "TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "FB reference voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 0.985,
          "typ": 1,
          "max": 1.015,
          "conditions": "TJ = -40°C to +125°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "HS-FET zero-current detection (ZCD)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": -200,
          "typ": 0,
          "max": 300,
          "conditions": "PSM, VFB = 1V, L = 1.5μH, VOUT = 8V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Switching current limit",
          "symbol": "IPK_LIMT",
          "kind": "electrical",
          "unit": "A",
          "min": 8.5,
          "typ": 9.5,
          "max": 11,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output over-voltage protection (OVP) threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 16,
          "typ": 16.5,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating VDD voltage at 12V input",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 3.4,
          "max": null,
          "conditions": "VIN = 12V, 0mA - 10mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Shutdown current",
          "symbol": "ISD",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "VEN = 0V, measured on VIN",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN high voltage threshold",
          "symbol": "VEN_H",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VEN rising (micro-power)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN low voltage threshold",
          "symbol": "VEN_L",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.4,
          "max": null,
          "conditions": "VEN falling (micro-power)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN input current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0,
          "max": null,
          "conditions": "VEN = 0V, 1.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN turn-on delay",
          "symbol": "",
          "kind": "electrical",
          "unit": "μs",
          "min": null,
          "typ": 220,
          "max": null,
          "conditions": "EN is on, IC starts switching",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "LS-FET minimum on time",
          "symbol": "tMIN_ON",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 130,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "LS-FET maximum on time",
          "symbol": "tMAX_ON",
          "kind": "electrical",
          "unit": "μs",
          "min": null,
          "typ": 7.5,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "FB input current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "VFB = 1.05V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Soft-start time",
          "symbol": "tSS",
          "kind": "electrical",
          "unit": "ms",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "VFB from 0V to 1V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "LS-FET switch on resistance",
          "symbol": "RON_L",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 14,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-side synchronous switch on resistance",
          "symbol": "RON_H",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 21,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "LS-FET leakage current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VSW = 16V, TJ = 25°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "HS-FET leakage current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VOUT = 16V, VSW = 0V, TJ = 25°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output OVP hysteresis",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
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