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.
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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.
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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.
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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
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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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