12V step-down dc converter circuit
Using ADP2300 ADP2301 step-down dc dc regulators with integrated power MOSFET, can be designed a very simple DC DC voltage converter.
Output voltage delivered by these circuits can be adjusted from 0.8 volts, up to 0.85xVin , with ±2% accuracy. The maximum output current that can be provided by ADP2300 ADP2301 regulators is up to 1.2 A load current.
There are two frequency options: the ADP2300 runs at 700 kHz, and the ADP2301 runs at 1.4 MHz. These options allow users to make decisions based on the trade-off between efficiency and total solution size. Current-mode control provides fast and stable line and load transient performance.
Bellow you an see two design examples, which require few common electronic components.
First circuit will provide a 2.5V output at a maximum current of 1.2A from an input voltage of 12 volts.
Second circuit will provide a 5V output at a maximum current of 1.2A from an input voltage of 12 volts.