Dual-output synchronous controllers for always-on systems

Renesas Electronics Corporation has announced two new 42V dual synchronous controllers with low 6µA quiescent current and integrated 2A source/3A sink MOSFET drivers that give primary power stage solutions for the company's R-Car H3 and R-Car M3 SoCs. The ISL78264 dual sync buck controller controls the intermediate first stage DC-DC conversion, stepping down the 12V battery system to 5V and 3.3V to power the vehicle’s ECU, IVI and digital cockpit systems with 50W-200W power levels. The ISL78263 dual sync boost and buck controller provides DC-DC conversion to support power levels of 25W-100W while giving a pre-boost if the battery voltage (VBAT) dips to as low as 2.1V through a cranking transient or a start/stop event.

“The ISL78264 and ISL78263 provide the ideal primary stage power regulation solutions for Renesas’ R-Car H3 and R-Car M3 SoCs, which are introducing the automotive industry to new electronic architectures that improve vehicle performance, efficiency, safety, and reliability,” said Niall Lyne, vice president, Automotive Analog Power and Video Business Division at Renesas. “The controllers’ always-on operation and industry’s lowest quiescent current gives power system designers the extra margin they need to stay within their 100µA power budget and can even manage tight budgets down to 50µA. The ISL78264 and ISL78263 integrate strong MOSFET drivers that deliver higher efficiency and power compared to other automotive buck or boost VBAT controller solutions.”

The devices also incorporate extensive protection for OV, UV, overcurrent, overtemperature, and a bootstrap supply undervoltage detection and refresh circuit to protect the high side MOSFET. Both controllers are AEC-Q100 Grade-1 qualified for ambient operation of -40C to +125C.