LT8697HUDD#TRPBF

The LT8697HUDD#TRPBF is a high-performance special-purpose voltage regulator that offers power conversion flexibility and low quiescent current. It integrates gate drive, high-side and low-side duty-cycle controllers with diagnostics and integrated power switches to follow a buck-boost/SEPIC topology. The HV9910-based energy harvesting solution in the LT8697HUDD#TRPBF allows for very low-power input operation with high *efficiency in many applications.

Overview

The LT8697HUDD#TRPBF is a HV9910-based energy harvesting solution that integrates two gate drive outputs, a high-side gate driver, a low-side gate driver, a voltage level shifter, a current-sense amplifier, a high-side power FET, a low-side power FET, feedback error amplifier, voltage and current diagnostics, a constant on-time control loop with temperature sense, a cascode FET drive, and a backup system. The LT8697HUDD#TRPBF is ideal for applications where high efficiency, wide input voltage range and low quiescent current are desired.

Application Field

The LT8697HUDD#TRPBF is suitable for many applications, such as photovoltaic (PV) systems, consumer electronics, battery-powered products, and renewable energy systems. The device offers a wide input operating voltage range of 4.5V to 12V and provides high efficiency, low quiescent current, and fast load transients. It also provides a wide configurable output voltage range from 0.85V to 35V, making it an ideal solution for a wide range of applications.

Working Principle

In order to regulate the output voltage, the LT8697HUDD#TRPBF uses a constant on-time (COT) control loop with a temperature sense compensation that reduces noise, jitter, and ringing. The input voltage is sensed through a resistor divider to the VIN pin which then is sampled and amplified by an error amplifier to generate an error signal. The error signal controls a high-side MOSFET and a low-side MOSFET connected in a buck-boost/SEPIC configuration to regulate the output voltage. The FET driver switches are controlled by a logic signal to adjust the switching frequency.

Conclusion

The LT8697HUDD#TRPBF is a high-efficiency special-purpose voltage regulator suitable for various systems such as photovoltaic systems, consumer electronics, battery-powered products and renewable energy systems. The device combines low quiescent current and fast load transients with a wide input voltage range and a configurable output voltage range from 0.85V to 35V. The LT8697HUDD#TRPBF is engineered for efficient operation and versatility in many applications.