MT3540

@@ -0,0 +1,46 @@+# MT3540++**Aerosemi** · DC-DC Converters · SOT-23-5++MT3540 from Aerosemi, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | SW | output | 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. |+| 2 | GND | power_in | Ground return for the IC and the internal power MOSFET source. Tie to a solid ground plane for heat sinking and low-noise operation. |+| 3 | FB | input | 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. |+| 4 | EN | input | 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. |+| 5 | VIN | power_in | 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. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Aerosemi |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `MT3540`+- `MT3540-F23`+- `MT3540-F25`++## CAD (KiCad official)++- Symbol: `MT3540`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Aerosemi datasheet](docs/mt3540-datasheet.pdf) (8 pp, sha256 `e4331b29563556e7`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/mt3540-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "mt3540",+  "version": "0.1.0",+  "type": "component",+  "description": "Aerosemi DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "pmic",+    "mt3540"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "mt3540.kicad_sym",+    "mt3540.kicad_mod",+    "mt3540.glb",+    "mt3540.step",+    "mt3540.lbr",+    "docs/hero.png",+    "docs/mt3540-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file