The recommended layout and placement for the MAX5426CEUD+ involves keeping the device away from high-current carrying traces, using a solid ground plane, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane is also recommended. Refer to the Maxim Integrated Products application note AN1890 for more details.
To ensure proper power-up and initialization, the MAX5426CEUD+ requires a power-on reset (POR) circuit to ensure the device is fully powered up before the output voltage is enabled. A 10uF capacitor on the EN pin and a 1kΩ resistor on the RST pin are recommended. Refer to the datasheet for more details.
The maximum output current capability of the MAX5426CEUD+ is 2A per channel, but this can be limited by the thermal performance of the PCB and the device's thermal dissipation. It's essential to perform thermal analysis and ensure the device is properly heatsinked to achieve the maximum output current.
The MAX5426CEUD+ output voltage can be configured using external resistors R1 and R2. The output voltage is calculated using the formula VOUT = 1.25V x (1 + R2/R1). The resistors should be chosen to ensure the desired output voltage is achieved while maintaining a minimum of 10kΩ impedance.
The EN (enable) pin is used to enable or disable the output voltage, while the RST (reset) pin is used to reset the device and ensure a proper power-up sequence. The EN pin should be tied to a logic high to enable the output voltage, and the RST pin should be tied to a logic high through a 1kΩ resistor to ensure a proper reset.
MAX5426CEUD+ datasheet
by Maxim Integrated Products
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