MPS > DC/DC (Step-Down) Synchronous Switcher > NB6381  

Product

NB6381 

Product Info

Fully Integrated, 30mΩ/12mΩ, High Efficiency, Fast Transient, 8A, 28V, Constant On-Time (COT), Synchronous Step-Down Converter in a 3x4mm QFN Package

Description

The NB6381 is a fully integrated, high frequency synchronous rectified step-down switch mode converter. It offers a very compact solution to achieve 8A continuous output current over a wide input supply range with excellent load and line regulation. The NB6381 operates at high efficiency over a wide output current load range. Constant-On-Time (COT) control mode provides fast transient response and eases loop stabilization. Full protection features include SCP, OCP, OVP, UVP and thermal shutdown. The NB6381 requires a minimum number of readily available standard external components and is available in a space-saving 3mm x 4mm 20-pin QFN package.

Features

• Wide 4.5V to 28V Operating Input Range
• 8A Output Current
• Internal 30mΩ High-Side, 12mΩ Low-Side Power MOSFETs
• Proprietary Switching Loss Reduction Technique
• 1% Reference Voltage
• Programmable Soft Start Time
• Soft Shutdown
• 200kHz to 1MHz Switching Frequency
• SCP, OCP, OVP, UVP Protection and Thermal Shutdown
• Output Adjustable from 0.8V to 13V
• Available in a 20-pin 3x4mm QFN Package

Typical Application

 

Efficiency Curve

 

Vin (Min) (V)

4.5 

Vin (Max) (V)

28 

Iout (Max) (A)

Isw Limit (Typ) (A)

12 

Iq (Typ) (mA)

0.5 

Vfb (V)

0.815 

Freq 1 (kHz)

200kHz to 1MHz 

Freq 2 (kHz)

Soft Start

External 

Package 1

QFN20 

Package 2

Datasheet Download

Click here to download datasheet 

Eval Board Download

EVNB6381DL-00A

App Note

 

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Notes

 
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