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5A 12 volt switching power supply design using LTC3789 regulator

Using the LTC3789 high performance buck-boost switch-ing regulator controller , designed by Linear Technology can be designed a very simple and high efficiency 12 volts power supply electronic project .
The constant-frequency, current mode architecture allows a phase-lockable frequency of up to 600kHz, while an output current feedback loop provides support for battery charg¬ing. With a wide 4V to 38V (40V maximum) input and output range and seamless, low noise transitions between operating regions, the LTC3789 is ideal for automotive, telecom and battery-powered systems.

The operating mode of the controller is determined through the MODE/PLLIN pin. The MODE/PLLIN pin can select between pulse-skipping mode and forced continuous mode operation and allows the IC to be synchronized to an external clock. Pulse-skipping mode offers the lowest ripple at light loads, while forced continuous mode operates at a constant frequency for noise-sensitive applications.

This high current DC DC converter circuit operates from a wide input voltage range , from 5 up to 38 volts and will provide a 12 volt output at a maximum current of 5 Amperes .
It is recommended that for input voltage and output voltage to use planes to maintain good voltage filtering and to keep power losses low.

12 volt power supply circuit design using LTC3789 buck boost switching regulator

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