The LTC3835 is a low-power synchronous step-down controller that extends battery life in automotive applications. Its features include ultralow quiescent current (80µA), wide input voltage range (4V to 36V), constant frequency current-mode architecture, high-side inductor current sensing, adjustable soft-start, external clock synchronization, and CLKOUT pin.
This document is a design note (DN1014) for the Linear Technology LTC3835 synchronous step-down controller. It highlights the device's ability to operate with an ultralow quiescent current of 80µA, making it ideal for battery-powered applications that spend significant time in standby mode.
The text details key features such as a wide input voltage range (4V to 36V), constant frequency current-mode architecture, and integrated synchronous FET drivers. It also covers advanced capabilities like adjustable soft-start, external clock synchronization via phase-locked loop, interleaved operation for high output currents, and various protection mechanisms including overvoltage and short-circuit protection.
The device supports a wide input voltage range from 4V to 36V.
The LTC3835 provides high efficiency over a wide load range up to 20A.