MT3540

{
 "schema": "adom.pads/1",
 "slug": "mt3540",
 "footprint": "SOT-23-5",
 "generated_from": {
  "footprint": "SOT-23-5@sha256:455a3f7c3e5eb5b8",
  "pins": "page.json:component.pins",
  "overrides": null
 },
 "pin1": {
  "pad": "1",
  "at": [
   -1.1375,
   -0.95
  ],
  "corner": "top-left",
  "source": "silk-marker",
  "derived_from": "SOT-23-5@sha256:455a3f7c3e5eb5b8"
 },
 "pad_count": 5,
 "symbol_pins": [
  "1",
  "2",
  "3",
  "4",
  "5"
 ],
 "paste_apertures": 0,
 "issues": [],
 "pads": [
  {
   "pad": "1",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -1.1375,
    -0.95
   ],
   "rot": 0.0,
   "size": [
    1.325,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "1",
   "name": "SW",
   "type": "output",
   "description": "Power switch output - drain of the internal 0.5Ω, 1.5A N-channel power MOSFET. Connect the boost inductor and Schottky rectifier here. Node swings between GND and up to 28V; absolute max 30V. Keep the SW copper area small to minimize EMI.",
   "is_pin1": true,
   "source": {
    "geometry": "SOT-23-5.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "2",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -1.1375,
    0.0
   ],
   "rot": 0.0,
   "size": [
    1.325,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "2",
   "name": "GND",
   "type": "power_in",
   "description": "Ground return for the IC and the internal power MOSFET source. Tie to a solid ground plane for heat sinking and low-noise operation.",
   "is_pin1": false,
   "source": {
    "geometry": "SOT-23-5.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "3",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    -1.1375,
    0.95
   ],
   "rot": 0.0,
   "size": [
    1.325,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "3",
   "name": "FB",
   "type": "input",
   "description": "Feedback input to the internal error amplifier. Regulates to VREF = 1.20V (MT3540), 1.23V (-F23) or 1.25V (-F25). Set VOUT with a resistor divider: VOUT = VREF × (1 + R1/R2). Bias current ≈ −10nA (max −50nA). Absolute max −0.3V to 6V.",
   "is_pin1": false,
   "source": {
    "geometry": "SOT-23-5.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "4",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    1.1375,
    0.95
   ],
   "rot": 0.0,
   "size": [
    1.325,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "4",
   "name": "EN",
   "type": "input",
   "description": "Enable / on-off control. VIH ≥ 1.5V turns the converter on; VIL ≤ 0.4V shuts it down (IQ ≈ 0.1µA). Tie to VIN for automatic startup when unused. Absolute max −0.3V to 6V.",
   "is_pin1": false,
   "source": {
    "geometry": "SOT-23-5.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  },
  {
   "pad": "5",
   "kind": "smd",
   "shape": "roundrect",
   "at": [
    1.1375,
    -0.95
   ],
   "rot": 0.0,
   "size": [
    1.325,
    0.6
   ],
   "layers": [
    "F.Cu",
    "F.Mask",
    "F.Paste"
   ],
   "thermal": false,
   "pin": "5",
   "name": "VIN",
   "type": "power_in",
   "description": "Input supply pin, 2.5V to 5.5V (absolute max 6V). UVLO ≈ 2.2V with 100mV hysteresis. Must be locally bypassed with a low-ESR ceramic capacitor (1µF or larger, X5R/X7R) close to the pin.",
   "is_pin1": false,
   "source": {
    "geometry": "SOT-23-5.kicad_mod",
    "meaning": "page.json:component.pins",
    "correspondence": "kicad: symbol pin number == pad name"
   }
  }
 ]
}