EVNB681-D-01A

New
26V, Low IQ, High Current Synchronous Buck Converter with 2-Bit VID Evaluation Board


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Product Description

The NB681 is a fully integrated high frequency synchronous rectified step-down switch mode converter with 2-Bit VID especially designed for V1.0A, VCCIO, PRIMCORE, EDRAM and EOPIO for IMVP8 applications. It offers very compact solution to achieve 6A continuous output current and 7.5A peak output current over a wide input supply range.

The NB681 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.

NB681 also provides a Low Power Mode for power loss saving during the low power state and Ultrasonic Mode to avoid audible noise.

Full protection features include OC Limit, OVP, UVP and thermal shut down.

The converter requires minimum number of external components and is available in QFN 2x3 packages.

Product Features

  • Wide 4.5V to 26V Operating Input Range
  • V1.0A/VCCIO/PCH/EDRAM/EOPIO compatible for IMVP8
  • Output adjustable by 2-Bit VID
  • Low Power Mode/25uA low quiescent Current
  • 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 Thermal Shutdown
  • Latch off reset via EN or Power Cycle

Parametrics

  • IC Supported 1NB681

Monolithic IC

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IC Details

The NB681 is a fully integrated, high-frequency, synchronous, rectified, step-down, switch-mode converter with 2-bit VID, especially designed for IMVP8 applications—VCCIO, PRIMCORE, V1.0A, EDRAM, and EOPIO. It offers a very compact solution to achieve a 6 A continuous output current and a 7.5 A peak output current over a wide input supply range.
The NB681 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.
To avoid audible noise, NB681 provides low-power mode for power loss saving during the low-power state and ultrasonic mode.
Full protection features include OC limit, OVP, UVP, and thermal shutdown. 
The converter requires a minimal number of external components, and it is available in a QFN 2mm x 3 mm package.

Programmable