The AAT1543 is an integrated power solution tailored for AMOLED and mobile devices. It includes a Boost and an inverting switching regulator operating at 1.5MHz and for VIN ranging from 2.3V to 4.5V. Output voltage of the Boost regulator is programmable from 4.6V to 5.5V, and the regulator is implemented with true-shutdown function to eliminate possible power loss during off mode. The inverting regulator output can is also programmable from –2.1V to –5.1V. Both regulators are synchronous converters with internal compensation, thereby reducing external part count to minimal.
During light load operation, both converters enters light-load mode, reducing the quiescent current down to less than 1.7mA to elevate power efficiency, making AAT1543 ideal for mobile applications.