AP2139AK-2.8TRG1

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    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
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        "name": "VIN",
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        "description": "Input supply voltage. Recommended operating range 2.5 V to 6.0 V (absolute max 6.6 V). A 1 µF input capacitor is required for stability."
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        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference return for the LDO regulator."
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      {
        "number": "3",
        "name": "CE",
        "type": "input",
        "description": "Active-high chip enable. Logic high (VIH ≥ 1.2 V) enables the regulator; logic low (VIL ≤ 0.3 V) shuts it down and triggers the AP2139's active quick output discharge. Internal pull-down current ~0.2 µA. Allowed voltage range -0.3 V to VIN+0.3 V."
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      {
        "number": "4",
        "name": "NC",
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      {
        "number": "5",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 2.8 V output (±2% accuracy), 250 mA maximum output current. Requires a >1 µF output capacitor with ESR 0.01 Ω to 100 Ω (ceramic recommended) for stability."
      }
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