New 1MHz / 2A DC-DC buck converter enables efficient compact designs

The new AP3402, AP3419 and AP3429 DC-DC step-down converters from Diodes Incorporated operate from inputs of 2.7V to 5.5V to supply loads up to 2A, with great efficiency under both light and heavy load conditions. A high switching frequency of 1MHz reduces the size of external components; this, combined with small TSOT25 or TSOT26 packages, ensures a small circuit board footprint in end-equipment such as TVs, monitors, set-top boxes, routers, notebook PCs and security systems. A 100% duty cycle allows the devices to work with the lowest VIN and a low quiescent current of just 90µA helps conserve the life of battery-powered equipment. The devices are housed in industry-standard pinout TSOT25/26 packages and feature an integrated soft-start that prevents damage as the output switches turn on while integrated over-current and over-temperature protection (OCP and OTP) protect both the system and the IC from damage under fault conditions.