Description:Low Standby Current; Output Voltage Adjustable; Precision 2% Reference; Operation from 3.0 V to 40 V Input; Current Limiting; Frequency Operation to 100 kHz; Output Switch Current to 1.5 A; MC34063A = 0 to +70℃; MC33063A = -40 to +85℃; MC33063AV / NCV33063A = -40 to +125℃; 4x4mm DFN package option
The maximum input voltage that can be applied to the MC34063AP1G is 40V, but it's recommended to keep it below 30V for reliable operation.
To ensure CCM operation, the inductor value should be chosen such that the inductor current ripple is less than 30% of the average inductor current. Additionally, the output capacitor should be large enough to filter the output voltage ripple.
The error amplifier output (pin 5) is used to compensate for voltage drops in the output stage. It can be connected to the output voltage sense pin (pin 6) to improve output voltage regulation. A capacitor can be connected between pin 5 and ground to filter the error amplifier output.
The inductor value depends on the output current, switching frequency, and input voltage. A good starting point is to use the inductor value calculation formula provided in the datasheet. Then, adjust the value based on the specific application requirements and performance trade-offs.
The maximum output current that the MC34063AP1G can deliver depends on the input voltage, output voltage, and inductor value. Typically, it can deliver up to 1.5A, but this can be limited by the internal switch current rating and the thermal performance of the package.
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