NB650A
High-Effeciency, Fast-Transient, 6A, 28V
Synchronous Step-Down Converters with 2-Bit VID
DESCRIPTION
The NB650A is fully-integrated, high-frequency,
synchronous, rectified, step-down, switch-mode
converters with dynamic-output–voltage control.
It offers a very compact solution to achieve 6A
of continuous output current over a wide input
supply range, and has excellent load and line
regulation. The NB650A operates at high
efficiency over a wide output-current–load
range.
Constant-On-Time control mode provides fast
transient response and eases loop stabilization.
2-bit VID inputs support changing the output
voltage on-the-fly.
Full protection features include short-circuit
protection, over-current protection, over-voltage
protection, under-voltage protection, and
thermal shut down.
The NB650A requires a minimal number of
readily-available standard external components,
and is available in a space-saving 3mm×4mm
QFN17 package.
FEATURES
Wide 4.5V-to-28V Operating Input Range
6A Output Current
Internal 50mΩ High-Side, 18mΩ Low-Side
Power MOSFETs
Proprietary Switching Loss Reduction
Technique
1% Reference Voltage
Programmable Soft-Start Time
2-bit VID Input
Soft Shutdown
Frequency Programmable from 150kHz to
1MHz
SCP, OCP, OVP, UVP, and Thermal
Shutdown
Optional OCP Protection: Latch-Off Mode
Output Adjustable from 0.6V to 13V
Available in QFN17 (3mm×4mm) Package
APPLICATIONS
Notebook Systems and I/O Power
Networking Systems
Digital Set Top Boxes
Flat-Panel Televisions and Monitors
Distributed Power Systems
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For
MPS green status, please visit MPS website under Quality Assurance. “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION （FOR NOTEBOOK）
NB650A Rev. 1.02
www.MonolithicPower.com
1
6/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
