DC456 is a high efficiency, high frequency buck converter, incorporating the LTC3412 monolithic synchronous regulator. The DC456 has an input voltage range of 2.5V to 5.5V and an output voltage range from 0.8V to 5V. The operating frequency range of the DC456 is either set with an external resistor or synchronized to an external clock, with a range between 100 kHz and 1.5 MHz. Due to these features, the DC456 is ideal for Li-Ion battery voltage (2.7V to 4.2V) applications, such as PDAs, cellular phones, and digital cameras. The DC456 can deliver high(er) power – up to 2A of output current – in a relatively small circuit, because of the high current power switches (80 mΩ of on-state resistance) on the LTC3412. The LTC3412 also incorporates OPTI-LOOP compensation, so that the DC456 can be optimized to provide fast transient response over a wide range of line and load conditions. All these features make the DC456 perfectly suited for battery-powered, hand-held applications.