Linear’s 76V, 1A buck converter has only 12µA quiescent current

Linear Technology’s new LTC3637 device is a 76V input-capable high efficiency buck converter that delivers up to 1A of continuous output current. It operates from an input voltage range of 4V to 76V, making it suitable for telecom, industrial, avionic and automotive applications. It uses a programmable peak current-mode design to optimise efficiency over a broad range of output currents and delivers efficiencies as high as 90% and requires only 12µA of quiescent current, maximizing battery run time.

A user-programmable output current limit can set output current from 100mA to 1A as required by the application. The LTC3637 can be programmed with fixed output voltages of 1.8V, 3.3V or 5V or a resistor divider can be used to program outputs from VIN to 0.8V.

The LTC3637’s thermally enhanced MSOP or 3mm x 5mm DFN packages offer additional pin spacing required for high voltage inputs. The combination of its MSOP or DFN package and only four tiny externals provide a highly compact solution footprint for a wide array of applications.

The LTC3637 utilizes an internal 350mO power MOSFET that draws only 12µA at no load while maintaining output voltage regulation, making it suitable for always-on battery-powered applications. Due to the inherent stability of the converter, no external compensation is required, thereby simplifying design and minimising the solution footprint. Additional features include a precise 0.8V ±1% feedback voltage reference and internal or external soft-start.


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