NB681GD Datasheet | Monolithic Power Systems

DESCRIPTION The NB681 is a fully integrated, high-frequency, synchronous, rectified, step-down, switch-mode converter with 2-bit VID, especially designed for IMVP8 applications- VCCIO, PRIMCORE, V1.0A, EDRAM, and EOPIO. It offers a very pact solution to achieve a 6A continuous output current and a 7.5A peak output current over a wide input supply range. The NB681 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. To avoid audible noise, NB681 provides lowpower mode for power loss saving during the low-power state and ultrasonic mode. Full protection features include OC limit, OVP, UVP, and thermal shutdown. The converter requires a minimal number of external ponents, and it is available in a QFN 2mm x 3 mm package. TYPICAL APPLICATION FEATURES - Wide 4.5V to 28V Operating Input Range - VCCIO/PRIMCORE/EDRAM/EOPIO/V1.0A patible for IMVP8 - Output Adjustable by 2-Bit VID - Low-Power Mode - 25µA Low Quiescent Current - 6A Continous Output Current - 7.5A Peak Output Current - Selectable Ultrasonic Mode - Adaptive COT for Fast Transient - DC Auto-Tune Loop - Stable with POSCAP and Ceramic Capacitors - 1% Reference Voltage - Internal Soft Start - Output Discharge - OCL, OVP, UVP, and Thermal Shutdown, - Latch-Off Reset via EN or Power Cycle - QFN 2mm x 3mm Package APPLICATIONS - Laptop puters - Tablet PCs - Networking Systems - Servers - Personal Video Recorders - Flat Panel Televisions and Monitors - Distributed Power Systems All MPS parts are lead-free, halogen-free, and adhere to the Ro HS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. NB681 Rev....