The AP68355QSP-13 from Diodes Incorporated is an Automotive-Grade Standard Buck Converter that steps down an input voltage of 5.5-80 V to an output voltage of 1.2-50 V. It has a continuous output current of 3.5 A and has a default frequency of 300 kHz. This converter fully integrates a 500 milli-ohms high-side power MOSFET to provide highly efficient step-down DC-DC conversion. It minimizes the external component count due to its adoption of Constant On-Time (COT) control and achieves fast transient response, easy loop stabilization, and low output voltage ripple.
This DC-DC converter is optimized for Electromagnetic Interference (EMI) reduction. It includes a gate driver to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, thereby reducing high-frequency radiated EMI noise caused by MOSFET switching. This converter benefits from overcurrent protection (OCP) and thermal protection. It is available in a surface-mount package that measures 6.1 x 4.95 mm.
