Suitable for applications with long operating life due to low standby current consumption
Reduce EMI/EMC emissions and simplify design

Analog Devices announced the release of the new LT8645S synchronous step-down switching regulator, which supports 8A, 65V input.

The Silent Switcher® 2 architecture applied to this product features two internal input capacitors, as well as internal BST and INTVCC capacitors to minimize hot loop area.



The LT8645S significantly reduces EMI/EMC emissions by adopting a design that uses copper patterns instead of bonding wires, along with stabilized switching edges and internal circuits coupled to the ground plane. Thanks to its enhanced EMI/EMC performance, it is less affected by board layout, simplifying the design and reducing risk even when using 2-layer PC boards.

The LT8645S operates at a switching frequency of 2 MHz across the entire load range, allowing it to easily pass automotive CISPR 25, Class 5 peak EMI standards.

The LT8645S's synchronous rectification provides a high efficiency of 94% when operating at a switching frequency of 2 MHz. Supporting a wide input voltage range of 3.4 V to 65 V, it is suitable for 24 V dual-cell commercial vehicles, 48 V automotive, and industrial applications. The built-in high-efficiency switch can be set to a low voltage of 0.97V and provides a continuous output current of up to 8A.

The Burst Mode® operation of the LT8645S consumes only 2.5µA of standby current, making it suitable for applications requiring long battery life, such as always-on systems in automotive and transportation.