DESCRIPTION
The NB679 is a fully integrated, high-frequency, synchronous, rectified, step-down switch-mode converter with a fixed 5 V output. It offers a very compact solution to achieve 8 A continuous output current and 10 A peak output current over a wide input supply range with excellent load and line regulation.
The NB679 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.
NB679 provides a fixed 5 V 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 components and is available in QFN 2mm x 3mm package.

FEATURES
 Wide 5.5 V to 28 V Operating Input Range
 Fixed 5 V Vout
 Supports 5.5 V-5 V
 Ultrasonic Mode with Fs over 25 kHz
 100 μA Low Quiescent Current
 8 A Continous Output Current
 10 A Peak Output Current
 Adaptive COT for Fast Transient
 DC Auto-Tune Loop for Load Regulation
 Stable with POSCAP and Ceramic Output Capacitors
 Built-In 5 V, 100 mA LDO with Switch Over
 1% Reference Voltage
 Internal Soft Start
 Output Discharge
 700 kHZ Switching Frequency
 OCP, OVP, UVP, and Thermal Shutdown.
 Latch-Off Reset via EN or Power Cycle
 QFN-12 (2mm x 3mm) Package

APPLICATIONS
 Laptop Computers
 Tablet PCs
 Networking Systems
 Personal Video Recorders
 Flat Panel Television and Monitors
 Distributed Power Systems