32V/3.5A High Power Density Synchronous Buck Converters for Industrial POL Applications with Unique Noise Reduction Features

Diodes Incorporated announces the AP63356 and AP63357, 3.5A, synchronous buck converters with a 3.8V to 32V input voltage with power-good (PG) and external compensation.

Image courtesy of Diodes Incorporated

Their 74mΩ high-side and 40mΩ low-side power MOSFETs provide high-efficiency step-down DC-DC conversion. For optimized light-load efficiency, the AP63357 operates in Pulse Frequency Modulation (PFM) with up to 86% efficiency at 5mA load. For the lowest output voltage ripple, the AP63356 operates in Pulse Width Modulation (PWM) with fixed 450kHz frequency, regardless of load.

Both devices have a proprietary ringing resistant switching-node gate driver without sacrificing the switching rise and fall times, reducing high-frequency radiated EMI noise. The devices feature Frequency Spread Spectrum (FSS) to further reduce EMI.

Both devices have the same pinout in the high-power density V-DFN3020-13 package, which has an optimized pin configuration to simplify PCB layout and reduces trace inductances. 

About Diodes Incorporated

Diodes Incorporated is a leading global manufacturer and supplier of high-quality application-specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serve the consumer electronics, computing, communications, industrial, and automotive markets. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.