NB680GD-Z

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 compact 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 kHz 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 components and is available in a QFN 2mm x 3mm package.

Wide 4.8 V to 26 V Operating Input Range Fixed 3.3 V Vout 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 Stable with POSCAP and Ceramic Output Capacitors 250 kHz CLK for External Charge Pump Built-In 3.3 V, 100 mA LDO with Switch Over 1% Reference Voltage Internal Soft Start Output Discharge 700 kHZ Switching Frequency OCL, OVP, UVP, and Thermal Shutdown Latch-Off Reset via EN or Power Cycle QFN 2mm x 3mm Package