By integrating six channels, featuring two buck converters, one with two step dynamic output voltage, with four LDOs, and independent enable functions, AnalogicTech’s AAT2603 power management IC provides designers design flexibility. The AAT2603 is an integrated power management IC targeted at mobile GPS devices, Portable Media Players (PMPs) and other handheld mobile systems operating off a single lithium-ion battery. The device comes in a small 4 x 4mm TDFN package and operates off a 2.7V to 5.5V input range. Delivering with 200mV of headroom, the first step-down converter supports functions requiring high output current and low dropout voltage. The second step-down converter supplies 600mA and adds a two-step dynamic output voltage capability to match the needs of common system processors.
The converter dynamically shifts between the two output voltages by toggling the SELB2 pin. Four LDOs supply power to a variety of system functions. Two LDOs deliver 200mA and are designed to power noise sensitive circuits. The second pair of LDOs offers 400mA output. Each of the four LDOs consumes just 50microA of quiescent current. The IC also features multiple protection circuits including those for short-circuit, over-current and over-temperature protection. The AAT2603 is qualified across the -40 to +85 degrees C temperature range. It is available in a Pb-free, 28-pin, 4x4-mm TQFN package.
