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NB669GQ

更新时间： 2024-02-10 19:25:46
品牌 Logo 应用领域
芯源 - MPS 转换器
页数 文件大小 规格书
19页 827K
描述
24V, High Current Synchronous Buck Converter With LDO

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NB669GQ 数据手册

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NB669  
24V, High Current  
Synchronous Buck Converter With LDO  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The NB669 is a fully integrated high frequency  
synchronous rectified step-down switch mode  
converter with 5V fixed output voltage. It offers  
very compact solution to achieve 6A continuous  
output current and 9A peak output current over  
a wide input supply range with excellent load  
and line regulation. The NB669 operates at high  
efficiency over a wide output current load range.  
•
•
•
•
•
•
•
•
Wide 6.5V to 24V Operating Input Range  
5V Fixed Output Voltage  
Built-in 5V, 100mA LDO with Switches  
6A Continuous Output Current  
9A Peak Output Current  
300kHZ CLK for External Charge Pump  
Low RDS(ON) Internal Power MOSFETs  
Proprietary Switching Loss Reduction  
Technique  
Internal Soft Start  
Output Discharge  
500kHZ Switching Frequency  
OCP, OVP, UVP Protection and Thermal  
Shutdown  
Constant-On-Time  
(COT)  
control  
mode  
provides fast transient response and eases loop  
stabilization.  
•
•
•
•
Under voltage lockout is internally set as 4.15 V.  
An open drain power good signal indicates the  
output is within its nominal voltage range.  
NB669 also provides a 5V LDO, which can be  
used to power the external peripheries, such as  
the keyboard controller in the laptop computer.  
A 300kHz CLK is also available; its output can  
be used to drive an external charge pump,  
generating gate drive voltage for the load  
switches without reducing the main converter’s  
efficiency.  
APPLICATIONS  
•
•
•
•
•
•
Laptop Computer  
Tablet PC  
Networking Systems  
Personal Video Recorders  
Flat Panel Television and Monitors  
Distributed Power 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.  
Full protection features include OCP, OVP,  
UVP and thermal shut down.  
“MPS” and “The Future of Analog IC Technology” are registered trademarks of  
Monolithic Power Systems, Inc.  
The converter requires minimum number of  
external components and is available in QFN16  
(3mmx3mm) package.  
TYPICAL APPLICATION  
NB669 Rev. 1.01  
7/23/2013  
www.MonolithicPower.com  
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.  
© 2013 MPS. All Rights Reserved.  
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