Synchronous buck converters bring improved efficiency to auto PoL applications

Diodes Incorporated has released two new synchronous buck converters. Aimed at automotive PoL applications, the DIODES AP66200Q and DIODES AP66300Q cover a broad input voltage range – from 3.8V to 60V. This enables all 12V-, 24V-, and 48V-based automotive systems to be addressed. These devices provide high-efficiency step-down conversion in vehicle powertrain, infotainment, telematics, and lighting systems through integrated power MOSFETs.

With their low IQ of 40μA, the devices satisfy the <100µA standby necessities associated with many automotive applications. They are readily configured to perform in either PFM or PWM modes. When in PFM mode, enhanced efficiency will be achieved at light loads, and operation in PWM mode will result in low ripple across all loads.

These devices have adjustable switching frequency capabilities (up to 2.5MHz) and can be synchronised to avoid beat frequency issues. Engineers can select between a high-efficiency operation or a smaller system design. Their low on-state resistance (RDS(ON)) values and enhanced efficiency modes substantially lower internal power dissipation. The soft-start pin is programmable to minimise inrush current and can be utilised for tracking multiple output voltages.

The devices are AEC-Q100 Grade 1 qualified, manufactured in IATF 16949 certified facilities, and support PPAP documentation. They are each supplied in compact 16-pin U-QFN4040-16/SWP (Type UXB) packages.