Datasheet > NB639

NB639

更新时间： 2024-02-14 17:52:12

品牌	Logo	应用领域
芯源 - MPS		转换器
页数	文件大小	规格书
19页	868K
描述
High Efficiency, Fast Transient, 8A, 28V Synchronous Step-down Converter In a Tiny QFN20 (3x4mm) Package

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NB639 数据手册

NB639

High Efficiency, Fast Transient, 8A, 28V

Synchronous Step-down Converter

In a Tiny QFN20 (3x4mm) Package

The Future of Analog IC Technology

DESCRIPTION

FEATURES

The NB639 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 NB639 operates at high efficiency

over a wide output current load range.

•

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

Programmable Switching Frequency

SCP, OCP, OVP, UVP Protection and

Thermal Shutdown

•

To further optimize efficiency at light load, this

device’s V_CCsupply is designed to be biased

externally.

Constant-On-Time (COT) control mode provides

fast transient response and eases loop

stabilization.

•

Output Adjustable from 0.8V to 13V

Available in a QFN20 (3x4mm) Package

Full protection features include SCP, OCP, OVP,

UVP and thermal shutdown.

APPLICATIONS

•

Notebook Systems and I/O Power

Networking Systems

Optical Communication Systems

Distributed Power POL Systems

The NB639 requires a minimum number of readily

available standard external components and is

available in a space-saving QFN20 (3x4mm)

package.

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

NB639 Rev.1.13

4/18/2012

www.MonolithicPower.com

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

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