NB671LA
24V, High Current
Synchronous Step-down Converter
NOT RECOMMENDED FOR NEW DESIGNS, REFER TO NB671LC OR NB691A
DESCRIPTION
FEATURES
The NB671LA is the low quiescent current
version of NB671. It is a fully integrated high
frequency synchronous rectified step-down
switch mode converter, which offers very
compact solutions to achieve 6A continuous
output current and 9A peak current over a wide
input supply range with excellent load and line
regulation. The NB671LA operates at high
efficiency over a wide output current load
range.
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Wide 5.5V to 24V Operating Input Range
6A Continuous Output Current
9A Peak Output Current
120μA Quiescent Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
1% Reference Voltage
Internal Soft Start
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Output Discharge
Constant-On-Time
(COT)
control
mode
500kHZ Switching Frequency
OCP, OVP, UVP Protection and Thermal
Shutdown
provides fast transient response and eases loop
stabilization.
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Latch off Reset via EN or Power Cycle.
Output Adjustable from 0.604V to 5.5V
Support 5V Output from 5.5V Input
Under voltage lockout is internally set as 4.5 V,
An open drain power good signal indicates the
output is within its nominal voltage range.
Full protection features include OCP, OVP, and
thermal shut down.
APPLICATIONS
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Laptop Computer
Tablet PC
Networking Systems
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
The converter requires minimum number of
external components and is available in QFN16
(3mmx3mm) package.
The NB671LA is pin-to-pin compatible with
NB671 with a NC pin changed to LP#, which is
used to receive the power state command from
the system.
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.
TYPICAL APPLICATION
NB671LA Rev. 1.01
8/27/2014
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2023 MPS. All Rights Reserved.
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