AP2900TB-A1

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  "title": "AP2900TB-A1",
  "brief": "Wuxi Chipown Micro electronics DC-DC Converters, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "AP2900TB-A1",
    "manufacturer": "Wuxi Chipown Micro electronics",
    "package": "SOT-23-5L",
    "pin_count": 5,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
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      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage, 6 V to 40 V operating (42 V absolute max). Requires a low-ESR decoupling capacitor (1 uF X5R/X7R MLCC in parallel with a 100 uF electrolytic recommended) placed as close as possible between VIN and GND to supply AC current to the internal power MOSFETs."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin. Common return for internal control circuitry and the low-side synchronous MOSFET source. Recommended to connect to the ground copper plane via vias for good thermal dissipation and noise suppression."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable input. High level enables the IC, low level disables the IC (shutdown mode). Must not be tied directly to VIN, and must not be connected to VIN through a series resistor. Drive voltage must be kept below 5 V. Internally pulled up by an approximate 50 uA current source to ~4.5 V, so the IC auto-starts if EN is left floating. If an external pull-down resistor is used to disable, it must be < 4.7 kΩ to guarantee a valid low."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback input. Connect to the midpoint of the external output feedback divider to program the output voltage (VFB reference 1.2 V typ). Route away from the SW switching node to minimize noise pickup."
      },
      {
        "number": "5",
        "name": "SW",
        "type": "output",
        "description": "Switch node. Drain of the internal high-side P-MOSFET and source of the low-side N-MOSFET; connect to the external inductor with a short, wide, thick trace to minimize EMI and switching loss."
      }
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  "metadata": {
    "specs": {
      "Manufacturer": "Wuxi Chipown Micro electronics",
      "Package": "SOT-23-5L",
      "Category": "PMIC",
      "Pins": "5"
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          "name": "Input voltage (VIN)",
          "symbol": "VIN",
          "kind": "recommended_operating",
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          "min": 6,
          "typ": null,
          "max": 40,
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        {
          "name": "Input UVLO threshold (rising)",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 5.5,
          "max": 5.7,
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        {
          "name": "Feedback voltage threshold",
          "symbol": "VFB-TH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.176,
          "typ": 1.2,
          "max": 1.224,
          "conditions": "",
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        {
          "name": "Switching frequency",
          "symbol": "FSW-TYP",
          "kind": "electrical",
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          "typ": 100,
          "max": 120,
          "conditions": "ILOAD = 0.5 A",
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        {
          "name": "EN internal pull-up current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 50,
          "max": 70,
          "conditions": "EN = GND",
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        {
          "name": "Quiescent current (open loop, not switching)",
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          "kind": "electrical",
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          "max": 420,
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        {
          "name": "Absolute max VIN",
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          "kind": "absolute_maximum",
          "unit": "V",
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          "conditions": "Voltage relative to GND pin",
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        {
          "name": "Absolute max SW",
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          "kind": "absolute_maximum",
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          "conditions": "Voltage relative to GND pin; printed as (VIN + 0.2 V) ≤ 42 V",
          "source_page": 4,
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        {
          "name": "Absolute max FB",
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          "conditions": "Voltage relative to GND pin",
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        {
          "name": "ESD rating (human body model)",
          "symbol": "ESD HBM",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "Class 3A per ANSI/ESDA/JEDEC JS-001-2017",
          "source_page": 4,
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        },
        {
          "name": "Minimum operating junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Input UVLO threshold hysteresis",
          "symbol": "VUVLO-HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "VIN falling",
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        {
          "name": "Feedback OVP threshold",
          "symbol": "VFB-OVP",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 113,
          "max": null,
          "conditions": "VFB rising",
          "source_page": 4,
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        {
          "name": "Feedback OVP threshold hysteresis",
          "symbol": "VFB-HYS",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "VFB falling",
          "source_page": 4,
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        {
          "name": "Feedback short-circuit protection threshold",
          "symbol": "VSCP",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "VFB falling",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle",
          "symbol": "DMAX",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Minimum on-time",
          "symbol": "TON-MIN",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "EN turn-on threshold",
          "symbol": "VEN-H",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VEN rising",
          "source_page": 4,
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        {
          "name": "EN turn-off threshold",
          "symbol": "VEN-L",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.4,
          "max": null,
          "conditions": "VEN falling",
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        {
          "name": "High-side MOSFET on-resistance",
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          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 450,
          "max": null,
          "conditions": "",
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        {
          "name": "Low-side MOSFET on-resistance",
          "symbol": "RDS(ON)L",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 270,
          "max": null,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "High-side MOSFET leakage current",
          "symbol": "ILEAK_H",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "VSW = 0 V",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Low-side MOSFET leakage current",
          "symbol": "ILEAK_L",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "VSW = VIN",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input current, shutdown",
          "symbol": "ISHD",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "EN = GND",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "No-load input current, closed loop",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 450,
          "max": null,
          "conditions": "Closed loop, no load",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Feedback pin current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Internal cycle-by-cycle current limit",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Soft-start time",
          "symbol": "TSS",
          "kind": "electrical",
          "unit": "ms",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "",
          "source_page": 5,
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        {
          "name": "Thermal shutdown threshold",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 175,
          "max": null,
          "conditions": "",
          "source_page": 5,
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        {
          "name": "Thermal shutdown hysteresis",
          "symbol": "TSD_HYS",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "",
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        {
          "name": "Thermal resistance, junction-to-case",
          "symbol": "ӨJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "",
          "source_page": 4,
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  "updated_at": "2026-09-24T16:37:34.366Z",
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