MD8942

{
  "schema_version": 1,
  "type": "component",
  "slug": "md8942",
  "title": "MD8942",
  "brief": "Shanghai Mingda Microelectronics DC-DC Converters, SOT-23-6L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "md8942"
  ],
  "component": {
    "mpn": "MD8942",
    "manufacturer": "Shanghai Mingda Microelectronics",
    "package": "SOT-23-6L",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/388f3b2f45ec5bce554590cf4b214d4b.pdf",
    "parts": {
      "symbol": "md8942.kicad_sym",
      "footprint": "md8942.kicad_mod",
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      "model_3d_plain": "md8942.glb",
      "model_3d_step": "md8942-etched.step",
      "model_3d_step_plain": "md8942.step",
      "lbr": "md8942.lbr"
    },
    "distributor_links": {
      "lcsc": "C2684786"
    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap pin providing gate-drive bias for the internal high-side switch FET. Connect a bootstrap capacitor (Cboot) between BST and SW. Absolute max BST-to-SW voltage is 6V; internally charged to ~5V from VCB through a diode."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground connection. Should be connected as close as possible to the output capacitor to avoid high current switching paths and to serve as the reference for feedback and enable."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the internal error amplifier. Set the output voltage via a resistor divider from VOUT to FB using VOUT = VFB × (1 + R2/R1), where VFB is typically 0.794V. Absolute max -0.3V to 6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable input, active-high logic. Pulling EN above the ~1V rising threshold enables the chip; pulling below the falling threshold (~0.84V, 160mV hysteresis) shuts it down. Floating EN disables the chip (internal 430kΩ pull-down to GND). Internal zener clamps EN to ~5V, absolute max 6V, sink current limit 100µA."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin. Operating range 4V to 36V, standoff input voltage 42V. Bypass with a low-ESR ceramic input capacitor (typ. 10µF) placed as close as possible to VIN and GND."
      },
      {
        "number": "6",
        "name": "SW",
        "type": "output",
        "description": "Switch node - the output of the internal high-side and low-side power MOSFETs. Connect to the external inductor and to the bootstrap capacitor's low side. Absolute max -0.3V to VIN(MAX)+0.3V."
      }
    ],
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shanghai Mingda Microelectronics",
      "Package": "SOT-23-6L",
      "Category": "PMIC",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Supply Voltage (VIN)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 42,
          "conditions": "",
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        },
        {
          "name": "Switch Voltage (VSW), max printed as VIN(MAX)+0.3V",
          "symbol": "VSW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
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        {
          "name": "BST to SW",
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          "min": -0.3,
          "typ": null,
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        },
        {
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        {
          "name": "Enable Sink Current (VEN)",
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        {
          "name": "All Other Pins",
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
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        },
        {
          "name": "Junction Temperature",
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          "min": null,
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        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
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        },
        {
          "name": "ESD Human Body Model (HBM)",
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          "unit": "kV",
          "min": 2,
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          "conditions": "HBM, minimum level",
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        },
        {
          "name": "Input Voltage Range",
          "symbol": "VIN_R",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": null,
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        },
        {
          "name": "VIN UVLO Up Threshold",
          "symbol": "VUVLO_U",
          "kind": "electrical",
          "unit": "V",
          "min": 3.2,
          "typ": 3.6,
          "max": 3.9,
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        },
        {
          "name": "Feedback Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.778,
          "typ": 0.794,
          "max": 0.81,
          "conditions": "4.8V < VIN < 36V, Iout=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 880,
          "typ": 1100,
          "max": 1320,
          "conditions": "",
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        },
        {
          "name": "Input Standoff Voltage",
          "symbol": "VIN_S",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 42,
          "max": null,
          "conditions": "VEN = 0V",
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        },
        {
          "name": "VIN UVLO Hysteresis",
          "symbol": "VUVLO_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "High-Side Switch on Resistance",
          "symbol": "RON_HS",
          "kind": "electrical",
          "unit": "mOhms",
          "min": null,
          "typ": 650,
          "max": null,
          "conditions": "VBST-VSW=5V",
          "source_page": 3,
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        {
          "name": "Low-Side Switch on Resistance",
          "symbol": "RON_LS",
          "kind": "electrical",
          "unit": "mOhms",
          "min": null,
          "typ": 650,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "High-Side Switch Leakage",
          "symbol": "ISW_HS_LKG",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VEN = 0V, VSW = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Low-Side Switch Leakage",
          "symbol": "ISW_LS_LKG",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "VEN = 0V, VSW = VIN",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak Inductor Current Limit",
          "symbol": "IHS_Limit",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.2,
          "max": null,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "COMP to Current Sense Transconductance",
          "symbol": "GCS",
          "kind": "electrical",
          "unit": "A/V",
          "min": null,
          "typ": 2.7,
          "max": null,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Soft-start time",
          "symbol": "TSS",
          "kind": "timing",
          "unit": "msec",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "VFB from 0 to 0.8V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Foldback Frequency",
          "symbol": "fSW_F",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum Switch on Time",
          "symbol": "τON",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Supply Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "VEN = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Average Quiescent Supply Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 130,
          "max": null,
          "conditions": "No load, VFB = 0.9V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 155,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "TSD_HYS",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Enable up Threshold",
          "symbol": "VEN_U",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Enable Threshold Hysteresis",
          "symbol": "VEN_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.16,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Enable Clamping Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Enable Pull-Down Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "kOhms",
          "min": null,
          "typ": 430,
          "max": null,
          "conditions": "",
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          "source": "datasheet"
        }
      ]
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  "updated_at": "2026-09-25T01:31:51.105Z"
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