DC/DC converter handles load-dump and cold-crank conditions

Linear Technology has introduced the H-grade version of its LT3692A, a monolithic, dual output step-down switching regulator that delivers up to 3.5A of continuous output current from each channel. The converter operates from a VIN range of 3 to 36V with transient protection to 60V, making it suitable for load dump and cold-crank conditions found in automotive applications. Independent input, shutdown, feedback, soft-start, current limit and comparator pins for each channel are said to simplify complex power supply tracking/sequencing requirements. The LT3692A’s switching frequency is user-programmable from 250kHz to 2.25MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands.

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

The LT3692AHUH is packaged in a 32-lead 5mm x 5mm QFN, priced starting at $4.95 each for 1,000 piece quantities. LT3692AHFE is packaged in a thermally enhanced TSSOP-38 and is FMEA compliant, pricing starts at $5.37 each for 1,000 piece quantities. Both versions are available from stock.