NB650H Datasheet, PDF (1/20 Pages) Monolithic Power Systems – High-Effeciency, Fast-Transient, 6A, 28V Synchronous Step-Down Converters with 2-Bit VID

NB650/NB650H
High-Effeciency, Fast-Transient, 6A, 28V
Synchronous Step-Down Converters with 2-Bit VID
The Future of Analog IC Technology
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）
VIN
C1
R6
ON/OFF
C5
ON/OFF
ON/OFF
11
IN
3
BST
R7
17
FREQ
1,2
SW
5
EN
8
VCC
R5
4
PG
6
VID1
NB650
NB650H
13
FB
RFB2 ¹⁴
RFB1 ¹⁵
7
VID2
PGND
9,10
SS ¹⁶
GND
12
C3
L1
R4
C4
R1
R2C R2B R2A
C6
V_OUT
C2
NB650/NB650H Rev. 1.12
www.MonolithicPower.com
1
10/11/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.