Diodes' AP3401 / AP3428 are current mode, PWM synchronous buck DC-DC converters capable of driving a 1 A load with high efficiency and excellent line-and-load regulation. They are developed to meet the demands of set-top boxes, TVs, routers, Wi-Fi modules, and security systems.

AP3401 / AP3428 converters deliver 1 A maximum output current while consuming only 40 μA no-load quiescent current. Ultra-low R_DS(ON) integrated MOSFETs and 100% duty cycle operation make them an ideal choice for high-current applications which require a low dropout threshold.

The AP3401 / AP3428 have built-in protection features and the AP3401 features a power-good output. They are available in the TSOT25, TSOT26, and U-DFN2020-6 packages.