EVNB679-D-00A

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26V, LowIq, High Current, Fixed 5.5V-8A Synchronous Buck Converter With 100mA LDO



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Product Description

The NB679 is a fully integrated high frequency synchronous rectified step-down switch mode converter with fixed 5V 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 load and line regulation.

The NB679 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.

NB679 also provide fixed 5V LDO which can be used to power the external peripheries.

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 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) Protection and Thermal Shutdown.
  • Latch off reset via EN or Power cycle.

Parametrics


Wide Vin 5.5-26V, Low Iq, High Current, Fixed 5V-8A Synchronous Buck Converter with 100mA LDO

The NB679 is a fully integrated, high-frequency, synchronous, rectified, step-down switch-mode converter with a fixed 5 V output. It offers a very compact solution to achieve 8 A continuous output current and 10 A peak output current over a wide input supply range with excellent load and line regulation. 
The NB679 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.
NB679 provides a fixed 5 V LDO, which can be used to power the external peripheries. 
Full protection features include OC limit, OVP, UVP, and thermal shutdown. 
The converter requires a minimum number of external components and is available in QFN 2mm x 3mm package.

Configurable

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.