NB679AGD Datasheet | Monolithic Power Systems

NB679A 28V, Low IQ, Fixed 5.1V, 8A, Synchronous Buck Converter with 100m A LDO and LP# VOUT Scaling DESCRIPTION The NB679A is a fully integrated, highfrequency, synchronous, rectified, step-down, switch-mode converter with a fixed 5.1V output and low-power mode voltage scaling. It offers a very pact solution to achieve an 8A continuous output current and a 10A peak output current over a wide input supply range with excellent load and line regulation. The NB679A operates at high efficiency over a wide output current load range based on MPS proprietary switching loss reduction technology and internal low Ron power MOSFETs. Adaptive constant-on-time (COT) control mode provides fast transient response and eases loop stabilization. The DC auto-tune loop provides good load and line regulation. The NB679A provides a fixed 5V LDO, which can be used to power the external peripheries. Full protection Features include OC limit, OVP, UVP, and thermal shutdown. The converter requires a minimum number of external ponents and is available in a QFN-12 2mm x 3mm package. Features - Wide 5.5V to 28V Operating Input Range - Fixed 5.1V Vout (+2% of 5V Vout) - LP# Output Voltage Scaling (-3% of 5V Vout) - Supports Large Duty Operation - Ultrasonic Mode - 100μA Low Quiescent Current - 8A Continuous Output Current and 10A Peak Output Current - Adaptive COT for Fast Transient - DC Auto-Tune Loop - Stable with POSCAP and Ceramic Output Capacitors - Built-In 5V, 100m A LDO with Switch Over - 1% Reference Voltage - Internal Soft Start - Output Discharge - 700k HZ Switching Frequency - OCP, OVP, UVP, and Thermal Shutdown - Latch-Off Reset via EN or Power Cycle - QFN-12 2mm x 3mm...