Keeping quiescent current under 75A

Linear Technology announces the H-grade version of the LT3972. The LT3972 is a 3.5A, 33V step-down switching regulator with Burst Mode operation to keep quiescent current under 75A. The LT3972 operates within a VIN range of 3.6V to 33V, with overvoltage lockout protection against transients as high as 62V, making it ideal for load dump and cold-crank conditions found in automotive applications. Its internal 4.6A switch can deliver up to 3.5A of continuous output current to voltages as low as 0.79V.

The LT3972s Burst Mode operation offers ultralow quiescent current, well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 200kHz to 2.4MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its thermally enhanced MSOP-10E package and high switching frequency, which keeps external inductors and capacitors small, provides a compact, thermally efficient footprint.

The H-grade version operates up to a junction temperature of 150C, compared to the 125C maximum junction temperature of the E- and I-grade versions. All electrical specifications are identical for the E-, I- and H-grade versions. H-Grade parts are tested and guaranteed to a maximum junction temperature of 150C and are ideal for automotive and industrial applications, which are subjected to high ambient temperatures.

Pricing for the LT3972HMSE starts at $5.47 each in 1,000-piece quantities and is available from stock.