A 2.5A, 42V input capable synchronous step-down switching regulator has been released by Linear Technology Corp. The device features synchronous rectification that delivers efficiency as high as 96 percent while Burst Mode operation keeps quiescent current under 2.5µA in no-load standby conditions.
The LT8610 has a 3.4V to 42V input voltage range that makes it ideal for automotive and industrial applications such as “always-on” systems which need to extend operating battery life.
The design of the device maintains a minimum dropout voltage of 200mV (@1A) under all conditions, enabling it to excel in scenarios such as automotive cold-crank.
Also, a fast minimum on-time of only 50ns enables 2MHz constant frequency switching from a 16V input to a 1.8V output, enabling designers to optimise efficiency while avoiding critical noise-sensitive frequency bands.
The 16-lead thermally enhanced MSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.
The device utilises 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 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.
Linear Technology Corp.
