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MT3540-F25
Public Made by Adomby adom
Aerosemi DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+44@@ -0,0 +1,44 @@+# MT3540-F25++**Aerosemi** · DC-DC Converters · SOT-23-5++MT3540-F25 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 | power_out | Power switch output. Drain of the internal NMOS power switch (RDS(on) ≈ 0.5Ω, 1.5A current limit). Connects to the boost inductor and the anode of the Schottky rectifier; can swing between GND and 28V. |+| 2 | GND | power_in | Device ground and return for the internal power MOSFET. Tie to a solid ground plane close to the input/output capacitor grounds for best noise and thermal performance. |+| 3 | FB | input | Feedback input to the internal error amplifier. Regulates to VFB = 1.25V (MT3540-F25 variant). Drive with a resistor divider from VOUT: VOUT = 1.25V × (1 + R1/R2). Input bias current ≈ -10nA (typ). |+| 4 | EN | input | Regulator on/off control. Drive high (VIH ≥ 1.5V) to enable the converter; drive low (VIL ≤ 0.4V) to shut it down (IQ ≈ 0.1µA). Tie to VIN for always-on / automatic startup. Do not leave floating. Absolute max -0.3V to 6V. |+| 5 | VIN | power_in | Input supply pin, 2.5V to 5.5V operating range (absolute max 6V). Must be locally bypassed with a low-ESR ceramic capacitor (≥1µF, 10µF typical) placed close to the pin. UVLO ≈ 2.2V with 100mV hysteresis. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Aerosemi |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `MT3540-F25`++## CAD (KiCad official)++- Symbol: `MT3540-F25`+- 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-f25-datasheet.pdf) (8 pp, sha256 `883fdc668f7ca165`, 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-f25-datasheet.pdf)
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