Linear Technology has announced the H-grade version of the LT3972, a 3.5 A, 33 V step-down switching regulator with burst mode operation to keep quiescent current under 75 µA.
It operates within a VIN range of 3.6 to 33 V, with overvoltage lockout protection against transients as high as 62 V, making it suitable for load dump and cold crank conditions founds in motor vehicle applications.
Its internal 4.6 A switch can deliver up to 3.5 A of continuous output to voltages of 0.79. The burst mode operation offers low quiescent current for applications such as motor vehicle or telecom systems, which demand always-on operation and optimum battery life.
Switching frequency is user programmable from 200 kHz to 2.4 MHz, enabling the designer to optimise efficiency while avoiding noise-sensitive frequency bands.
