600mA DC/DC Converter Improves Power Efficiency And Density For Portable Electronics

Efficient power conversion is very important to extending usage-time for battery-powered devices. Like its 6MHz ADP2121 sister device, the new 3MHz ADP2108 dc-to-dc converter operates from an input voltage as low as 2.3 V to provide excellent conversion efficiency, transient response, and protection. This low operating voltage allows designers to fully use the available battery energy for 2.5-V and 3-V power loads before recharging, which can eliminate the requirement of a more expensive buck-boost regulator in some applications. During light load conditions, the ADP2108 switches to a low-quiescent power-save mode for additional battery life savings.

Space savings and heat management are also important design considerations for portable devices and modular POL (point-of-load) systems. The ADP2108 device requires only three tiny external 0603 size components, which when combined with greater than 93 percent conversion efficiency, enables designers to support a higher load in a smaller area. In addition, ADI offers the ADIsimPower(tm) voltage regulator design tool and other downloadable power management tools that facilitate the design of high-efficiency dc-to-dc conversion blocks with reduced risk.

The ADP2108 is available in two package type options. The 1 mm x 1.5 mm x 0.6 mm WLCSP (wafer-level chip scale package) provides an ultra-low profile size for portable devices, such as mobile handsets, with stringent board space limitations, particularly on the z-axis. The 3 mm x
3 mm x 1 mm TSOT-23 (thin small outline transistor) package offers easy assembly for printed circuit board designs.