New Automotive-Compliant Synchronous Buck Converter Supports High Efficiency Operation and Reduces EMI

Diodes Incorporated has added the new AP64060Q to its family of automotive-compliant DC-DC converters. The new AP64060Q is a 600mA synchronous buck converter device that incorporates a 600mΩ high-side power MOSFET along with a 300mΩ low-side power MOSFET so that high-efficiency step-down conversion (reaching 90%) can be delivered and with minimal PCB board space. With an input voltage range of 4.5V to 40V, this converter is targeted for use in automotive powertrains, infotainment systems, and instrumentation clusters, as well as vehicles’ exterior lighting.

This AP64060Q converter has a very low quiescent current (IQ), typically only 90μA, which translates into enhanced light load efficiency and features synchronous rectification that eliminates the need for an external Schottky diode, while the use of a peak current mode control and built-in loop compensation network further reduces the overall component count. It has an operating ambient temperature range of -40°C to +125°C and the proprietary gate driver scheme employed in the AP64060Q alleviates switching node ringing without impacting MOSFET turn-on and turn-off times. 

Features

• AEC-Q100 Qualified with the Following Results

• Device Temperature Grade 1: -40°C to +125°C TA Range

• Device HBM ESD Classification Level H2

• Device CDM ESD Classification Level C5

• VIN 4.5V to 40V

• 600mA Continuous Output Current

• Less than 0.1% Output Ripple at 12V

• 90µA Low Quiescent Current (Pulse Frequency Modulation)

• 2MHz Switching Frequency

• Supports Pulse Frequency Modulation (PFM)

• Proprietary Gate Driver Design for Best EMI Reduction

• Precision Enable Threshold to Adjust UVLO

• Protection Circuitry

Applications

• 5V, 12V, and 24V Distributed Power Bus Supplies

• eMeter

• Automotive

• White Goods and Small Home Appliances

• FPGA, DSP, and ASIC Supplies

• General Purpose Point of Load

Availability and Pricing

The AP64060Q converter is AEC-Q100 Grade 1 qualified and is available at $0.23 in 1000 piece quantities.