LT3680IMSE#TRPBF

The LT3680 is a versatile monolithic buck switching regulator designed for a wide input voltage range of 3.6V to 36V. It integrates a high efficiency 95mΩ switch, a boost Schottky diode, and control circuitry, enabling it to deliver up to 3.5A of output current. The switching frequency is adjustable from 200kHz to 2.4MHz, allowing for optimization of efficiency and component size.

This regulator utilizes current mode topology for fast transient response and good loop stability. It supports low ripple Burst Mode operation, maintaining high efficiency at low output currents with output ripple below 15mV. For enhanced efficiency at very low loads, it can draw bias current from the output when VOUT is above 3V. The device includes a soft-start capability controlled by an external resistor and capacitor on the RUN/SS pin, and a power good flag signals when the output voltage reaches 91% of the programmed level.

The LT3680 is available in thermally enhanced 10-pin MSOP and 3mm x 3mm DFN packages, suitable for surface mount applications. Its features make it suitable for automotive battery regulation, power for portable products, distributed supply regulation, and industrial supplies.

Key electrical specifications include an output voltage range of 0.79V to 30V and a feedback reference voltage of 0.790V. The shutdown current is less than 0.5µA, and the quiescent current in Burst Mode is typically 75µA. The device also offers thermal protection.