NB675L
24V, High Current
Synchronous Buck Converter
With +/-1.0A LDO and Buffed Reference
NOT RECOMMENDED FOR NEW DESIGNS, REFER TO NB685A
DESCRIPTION
FEATURES
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Wide 4.7V to 24V Operating Input Range
10A Continuous Output Current
12A Peak Output Current
Built-in +/- 1.0A VTTLDO
105μA Quiescent Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
The NB675L is the lower quiescent current
version of NB675. It provides a complete power
supply for DDR3, DDR3L and LPDDR2 memory
with the highest power density. It integrates a
high frequency synchronous rectified step-down
switch mode converter (VDDQ) with a 1.0A
sink/source LDO (VTT) and buffered low noise
reference (VTTREF).
NB675L is able to deliver 10A continuous
output current and 12A peak output current
over a wide input supply range with excellent
load and line regulation. The Buck converter
employs the Constant-On-Time (COT) control
scheme, which provides fast transient response
and eases loop stabilization.
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Internal Soft Start
Output Discharge
500kHZ Switching Frequency for NB675L
OCP, OVP, UVP Protection and Thermal
Shutdown
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VDDQ Adjustable from 0.6V to 5.5V
APPLICATIONS
The VTT LDO provides 1.0A sink/source
current capability and requires only 10uF
ceramic capacitance.
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Laptop Computer
Tablet PC
Networking Systems
Server
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
The VTTREF tracks VDDQ/2 with an excellent
1% accuracy.
Under voltage lockout is internally set as 4.6V.
An open drain power good signal indicates
VDDQ is within its nominal voltage range.
Full protection features include OCP, OVP, 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.
This part requires minimum number of external
components and is available in QFN21
(3mmx4mm) package.
TYPICAL APPLICATION
NB675L Rev. 1.1
1/19/2020
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2023 MPS. All Rights Reserved.
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