Latest DC/DC converter delivers 96% efficiency, consumes only 2.5µA of quiescent current

The LT8610’s design maintains a minimum dropout voltage of only 200mV (@1A) under all conditions, enabling it to be used in scenarios such as automotive cold-crank. Furthermore, a fast minimum on-time of only 50ns enables 2MHz constant frequency switching from a 16V input to a 1.8V output, will enable designers to optimise efficiency while avoiding critical noise-sensitive frequency bands. The LT8610’s 16-lead thermally enhanced MSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.

The LT8610 uses internal top and bottom high efficiency power switches with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 10mVPK-PK. Special design techniques and a new high speed process enable high efficiency over a wide input voltage range, and the LT8610s’s current-mode topology enables fast transient response and excellent loop stability. Other features include internal compensation, a power good flag, output soft start/tracking and thermal protection.

The LT8611 includes all of the features of the LT8610, plus a built-in current sense amplifier with monitor and control pins, enabling accurate input or output current regulation and limiting. It is offered in a 3mm x 5mm 24-lead QFN package.

An industrial temperature version, the LT8610IMSE, is tested and guaranteed to operate from a -40°C to 125°C operating junction temperature. An automotive temperature version, the LT8610HMSE, is tested and guaranteed to operate from a -40°C to 150°C operating junction temperature.

Linear Technology

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