The LT8641's internal high efficiency switches are said to deliver up to 3.5A of continuous output current and peak loads of 5A to voltages as low as 0.81V. The device's Burst Mode operation is claimed to keep quiescent current under 2.5µA in no load standby conditions, suiting it for applications such as automotive ‘always-on’ systems, to extend battery life.
The LT8641's design maintains a minimum dropout voltage of 130mV at 1A under all conditions, suiting it to scenarios such as automotive cold crank. A minimum on-time of 35ns enables 2MHz constant frequency switching from a 24V input to a 3.3V output, allowing designers to optimise efficiency while avoiding critical noise sensitive frequency bands. The LT8641's 18-lead 3 x 4mm QFN package and high switching frequency keep external inductors and capacitors small, providing a compact, thermally efficient footprint.
An industrial temperature version, the LT8641IUDC, is also available and operates across an operating temperature range from -40 to 125°C.
