Monolithic Power Systems NB681A | Demoboard EVNB681A-D-00A

Description

The NB681A is a fully integrated, highfrequency synchronous rectified step-downswitch mode converter with 2-Bit VID,especially designed for IMVP8 applications-V1.0A, VCCIO, PRIMCORE, EDRAM andEOPIO, and other POLs(1.8V,2.5V,3.3V). Itoffers very compact solution to achieve 6Acontinuous output current and 7.5A peak outputcurrent over a wide input supply range.The NB681A 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.NB681A also provides a Low Power Mode forpower loss saving during the low power stateand Ultrasonic Mode to avoid audible noise.Full protection features include OC Limit, OVP,UVP and thermal shut down.The converter requires minimum number ofexternal components and is available in QFN 2x3packages.

Features

• Wide 4.5V to 26V Operating Input Range
• VCCIO/PCH/EDRAM/EOPIO/1.8V/2.5V/3.3V/ V1.0A compatible for IMVP8
• Output adjustable by 2-Bit VID
• Low Power Mode/25uA low quiescentCurrent
• 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 Cap
• 1% Reference Voltage
• Internal Soft Start and Output Discharge
• OCL, OVP, UVP Protection and ThermalShutdown
• Latch off reset via EN or Power Cycle

Typical applications

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

More information

• Datasheet
• IC product information