Monolithic Power Systems NB680 | Demoboard EVNB680-D-00A

Description

The NB680 is a fully integrated high frequency synchronous rectified step-down switch mode converter with fixed 3.3V Vout. It offers very compact solution to achieve 8A continuous output current and 10A peak output current over a wide input supply range with excellent loadand line regulation. The NB680 operates at high efficiency over a wide output current load rang based on MPS proprietary switching loss reduction tech 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 also provide fixed 3.3V LDO which can be used to power the external peripheries, such as the keyboard controller in the laptop.A 250kHz CLK is also available on NB680; its output can be used to drive an external charge pump, generating gate drive voltage for the loadswitches without reducing the main converter’s efficiency. Full protection features include OC Limit, OVP, UVP and thermal shut down.

Features

• Wide 5.5V to 26V Operating Input Range
• Fixed 3.3V Vout
• Ultrasonic Mode
• 100μA low quiescent Current
• 8A Continous Output Current
• 10A Peak Output Current
• Adaptive COT for Fast transient
• DC Auto Tune Loop
• Stable with POSCAP and Ceramic Output
• 250kHz CLK for external Charge Pump
• Built-in 3.3V, 100mA LDO with Switch Over
• 1% Reference Voltage
• Internal Soft Start
• Output Discharge
• 700kHZ Switching Frequency
• OCP, OVP, UVP (metal Hiccup) Protectionand Thermal Shutdown.
• Latch off reset via EN or Power cycle.

Typical applications

• Personal Video Recorders
• Networking Systems and Server
• Notebook Systems and Tablet PC
• Distributed Power Systems

More information

• Datasheet
• IC product information