DC to DC converters are important in portable electronic devices which contain an internal battery. These devices often contain several sub-circuits, each with its own voltage level requirement different from that supplied by the battery or external supply. They may also be higher or lower than the main supply voltage. To further complicate the issue, the battery voltage declines as its stored power is drained. Depending on the power range, input voltage range, output voltages, space constraints and efficiency goals of the power supply, different topologies will provide the better trade-off.
ST’s key products for DC – DC converters are:-