Datasheet > NB638DL

NB638DL

更新时间： 2024-01-23 03:30:54

品牌	Logo	应用领域
芯源 - MPS		转换器
页数	文件大小	规格书
19页	765K
描述
High Efficiency, Fast Transient, 7A, 28V Synchronous Step-down Converter in a Tiny 3x4mm QFN Package

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NB638DL 数据手册

NB638

High Efficiency, Fast Transient, 7A, 28V

Synchronous Step-down Converter

in a Tiny 3x4mm QFN Package

The Future of Analog IC Technology

DESCRIPTION

FEATURES

The NB638 is a fully integrated, high frequency

synchronous rectified step-down switch mode

converter. It offers a very compact solution to

achieve 7A continuous output current over a

wide input supply range with excellent load and

line regulation. The NB638 operates at high

efficiency over a wide output current load range.

•

Wide 4.5V to 28V Operating Input Range

7A 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

•

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.

•

Output Adjustable from 0.8V to 13V

Available in a QFN20 (3x4mm) Package

The NB638 requires a minimum number of

readily available standard external components

and is available in a space-saving QFN20

(3x4mm) package.

APPLICATIONS

•

Notebook Systems and I/O Power

Networking Systems

Optical Communication Systems

Distributed Power and POL Systems

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

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

8,19

BST

VIN

C_IN

NB638

9,10,17,18

FREQ

VOUT 1.05V

VCC

PGOOD

AGND PGND

11-16

C_SS

33nF

NB638 Rev.1.16

4/18/2012

www.MonolithicPower.com

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

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