Dual step-down converter series delivers low EMI operation

Analog Devices has launched the LT8650S, LT8652S and LT8653S dual-channel 4A/8.5A/2A synchronous step-down Silent Switcher converters aimed at automotive, communications and solid-state drive power supplies. The proprietary Silent Switcher 2 architecture together with spread spectrum frequency modulation provides PCB layout robustness to deliver ultra-low EMI performance that easily satisfies CISPR25 emissions.

The devices are also differentiated by their stackable-friendly outputs for higher current applications. Outputs are able to be paralleled to scale up or down the output current based on the system demand while optimising thermal performance. This also assists in reducing inventory and qualification time with a single device. For example, the LT8652S produces 8.5A DC from each channel simultaneously or up to 12A on either channel. Synchronising two of these chips can produce a four-phase, 34A supply.