A good PCB layout for the MP2690GR-Z should include a solid ground plane, separate analog and digital grounds, and a decoupling capacitor (e.g., 10uF) between VIN and GND. Keep the input and output capacitors close to the IC, and use short, wide traces for the power paths.
To ensure stability, use a minimum output capacitance of 10uF, and ensure the output capacitor's ESR is less than 1 ohm. Also, keep the feedback resistors (RFBT and RFB) as close to the IC as possible, and use a low-ESR input capacitor (e.g., 10uF).
The maximum input voltage for the MP2690GR-Z is 24V. Exceeding this voltage may damage the IC. It's recommended to add over-voltage protection (OVP) circuitry to prevent damage from voltage spikes or transients.
The output voltage (VOUT) is determined by the feedback resistors (RFBT and RFB): VOUT = 0.8V x (1 + RFBT/RFB). The output current limit is determined by the internal current limit (typically 3.5A) and the external current sense resistor (RCS).
The EN (enable) pin is an active-high input that enables or disables the regulator. When EN is high, the regulator is enabled, and when EN is low, the regulator is disabled. Use a logic-level signal (e.g., from a microcontroller) to control the EN pin.
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