Monolithic Power Systems NB679 | Demoboard EVNB679-D-00A

Description

The NB679 is a fully integrated high frequencysynchronous rectified step-down switch modeconverter with fixed 5V Vout. It offers verycompact solution to achieve 8A continuousoutput current and 10A peak output current overa wide input supply range with excellent loadand line regulation.The NB679 operates at high efficiency over awide output current load rang based on MPSproprietary switching loss reduction tech andinternal Low Ron Power MOSFETsAdaptive Constant-On-Time (COT) controlmode provides fast transient response andeases loop stabilization. The DC auto tune loopprovides good load and line regulation.NB679 also provide fixed 5V LDO which can beused to power the external peripheries.Full protection features include OC Limit, OVP,UVP and thermal shut down. The converterrequires minimum number of externalcomponents and is available in QFN 2x3packages.

Features

• Wide 5.5V to 26V Operating Input Range
• Fixed 5V Vout, Support 5.5V-5V
• 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
• Built-in 5V, 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
• Notebook Systems and Tablet PC
• Distributed Power Systems
• Networking Systems and Server

More information

• Datasheet
• IC product information