DC-DC converter provides five different topologies with 10A output
The LT8711 replaces the output diode with a high efficiency P-channel MOSFET, thereby increasing efficiency and maximum output current up to 10A, making it suitable for automotive, industrial, solar and general purpose applications.
The device operates over a 4.5V to 42V input voltage range and produces an output voltage that is dependent on the choice of external components. The 15μA no-load quiescent current with the output voltage in regulation extends operating run time in battery powered systems and a low ripple mode enables high efficiency at very light loads while maintaining low output voltage ripple. When configured as a synchronous buck, the LT8711 can operate at 100% duty cycle, a useful feature when powered from a battery that is discharging.
The converter features innovative EN/FBIN pin circuitry for input voltage regulation to avoid collapsing a high impedance input source such as a solar panel and this pin is also used for adjustable undervoltage lockout. The fixed operating frequency is selectable from 100kHz to 750kHz and can be synchronized to an external clock. Additional features include dual chip power supply inputs, a topology selection pin and adjustable soft-start.
The LT8711 is available in 20-lead TSSOP and 3mm x 4mm QFN packages. Extended and industrial versions operate over a junction temperature range of –40°C to 125°C and pricing starts at $2.30 each in 1000-piece quantities.