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NB670

更新时间： 2024-01-02 21:05:36
品牌 Logo 应用领域
芯源 - MPS 转换器
页数 文件大小 规格书
19页 705K
描述
24V, High Current Synchronous Buck Converter With LDO

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NB670 数据手册

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NB670  
24V, High Current  
Synchronous Buck Converter With LDO  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The NB670 is a fully integrated high frequency  
synchronous rectified step-down switch mode  
converter with 3.3V 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 NB670  
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.  
•
•
•
•
•
•
•
•
Wide 5V to 24V Operating Input Range  
3.3V Fixed Output Voltage  
Built-in 3.3V, 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  
•
•
•
•
Under voltage lockout is internally set as 4.65 V.  
An open drain power good signal indicates the  
output is within its nominal voltage range.  
NB670 also provides a 3.3V 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  
Full protection features include OCP, OVP,  
UVP and thermal shut down.  
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.  
The converter requires minimum number of  
external components and is available in QFN16  
(3mmx3mm) package.  
TYPICAL APPLICATION  
100  
95  
90  
V
=6V  
IN  
85  
80  
75  
70  
65  
60  
55  
50  
V
=8.4V  
IN  
V
=12.6V  
IN  
V
=19V  
IN  
1
10  
100  
1000 10000  
OUTPUT CURRENT (A)  
NB670 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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