NB650/NB650H

High-Effeciency, Fast-Transient, 6A, 28V

Synchronous Step-Down Converters with 2-Bit VID

NB650/NB650H Rev. 1.13

www.MonolithicPower.com

1

10/7/2019

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

Preliminary Specifications Subject to Change

© 2019 MPS. All Rights Reserved.

DESCRIPTION

The NB650/NB650H 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 NB650/NB650H

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 NB650/NB650H 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

(NB650) and Hiccup Mode (NB650H)

 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 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）