3.5V to 36V, 5A synchronous step-down voltage converter

30th August 2018
Enaie Azambuja

The LM73605/LM73606 family of devices are easy-to-use synchronous step-down DC/DC converters capable of driving up to 5A (LM73605) or 6A (LM73606) of load current from a supply voltage ranging from 3.5V to 36V. The LM73605/LM73606 provide exceptional efficiency and output accuracy in a very small solution size.

Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronisation to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications.

Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance.

Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605 and LM73606 devices are pin-to-pin compatible for easy current scaling.

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