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NB676A

更新时间: 2024-12-01 17:01:23
品牌 Logo 应用领域
芯源 - MPS 调节器
页数 文件大小 规格书
19页 752K
描述
8A, 24V,恒定导通时间(COT)控制模式同步降压变换器,具有低压差(LDO)调节器,固定输出 5.15V

NB676A 数据手册

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NB676A  
24V, High Current, Fixed 5.15V-8A  
Synchronous Buck Converter With LDO  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The NB676A is a fully integrated high frequency  
synchronous rectified step-down switch mode  
converter with 5.15V fixed output voltage. It  
offers very compact solution to achieve 8A  
continuous output current and 10A peak output  
current over a wide input supply range with  
excellent load and line regulation. The NB676A  
operates at high efficiency over a wide output  
current load range.  
Wide 6.5V to 24V Operating Input Range  
5.15V Fixed Output Voltage  
Built-in 5.15V, 100mA LDO with Switches  
8A Continuous Output Current  
10A Peak Output Current  
300kHZ CLK for External Charge Pump  
Low RDS(ON) Internal Power MOSFETs  
Proprietary Switching Loss Reduction  
Technique  
Constant-On-Time (COT) control mode provides  
fast transient response and eases loop stabilization.  
Internal Soft Start  
Output Discharge  
500kHZ Switching Frequency  
OCP, OVP, UVP Protection and Thermal  
Shutdown  
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.  
Latch Off Reset via EN or Power Cycle  
NB676A also provides a 5.15V 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  
NB676A Rev. 1.01  
10/16/2014  
www.MonolithicPower.com  
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.  
© 2014 MPS. All Rights Reserved.  
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