NB680 Datasheet | Monolithic Power Systems

28V, Low Iq, High Current, Fixed 3.3V-8A Synchronous Buck Converter with 100 m A LDO DESCRIPTION The NB680 is a fully integrated, high-frequency, synchronous, rectified, step-down, switch-mode converter with a fixed 3.3 V Vout. It offers a very pact solution to achieve an 8 A continuous output current and a 10 A peak output current over a wide input supply range with excellent load and line regulation. The NB680 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. NB680 provides a fixed 3.3 V LDO, which can power the external peripheries, such as the keyboard controller in the laptop. Also, a 250 k Hz CLK is available; its output can drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter’s efficiency. Full protection Features include OC limit, OVP, UVP, and thermal shutdown. NB680 requires a minimum number of external ponents and is available in a QFN 2mm x 3mm package. Features - Wide 4.8 V to 28 V Operating Input Range - Fixed 3.3 V Vout - Ultrasonic Mode with Fs over 25 k Hz - 100 μA Low Quiescent Current - 8 A Continous Output Current - 10 A Peak Output Current - Adaptive COT for Fast Transient - DC Auto-Tune Loop - Stable with POSCAP and Ceramic Output Capacitors - 250 k Hz CLK for External Charge Pump - Built-In 3.3 V, 100 m A LDO with Switch Over - 1% Reference Voltage - Internal Soft Start - Output Discharge - 700 k HZ Switching Frequency - OCL, OVP, UVP, and Thermal Shutdown. - Latch-Off Reset via EN or Power Cycle. - QFN 2mm x 3mm...