MP28262 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 2A, 21V, 1.1MHz Synchronous Step-down Converter

The Future of Analog IC Technology
MP28262
2A, 21V, 1.1MHz
Synchronous Step-down Converter
DESCRIPTION
The MP28262 is a high frequency synchronous
rectified step-down switch mode converter with
built in internal power MOSFETs. It offers a
very compact solution to achieve 2A continuous
output current over a wide input supply range
with excellent load and line regulation. The
MP28262 operates at high efficiency over a
wide output current load range.
Current mode operation provides fast transient
response and eases loop stabilization.
Full protection features include OCP and thermal
shut down.
The MP28262 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
FEATURES
• Wide 4.5V to 21V Operating Input Range
• 2A Output Current
• Low R_DS(ON) Internal Power MOSFETs
• Proprietary Switching Loss Reduction
Technique
• Fixed 1.1MHz Switching Frequency
• Sync from 400kHz to 2MHz External Clock
• Internal Compensation
• OCP Protection and Thermal Shutdown
• Output Adjustable from 0.8V
• Available in 14-pin QFN3x4 Package
APPLICATIONS
• Notebook Systems and I/O Power
• Networking Systems
• Digital Set Top Boxes
• Personal Video Recorders
• Flat Panel Television and Monitors
• Distributed Power Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
The information in this datasheet about the product and its associated
technologies are proprietary and intellectual property of Monolithic Power
Systems and are protected by copyright and pending patent applications
TYPICAL APPLICATION
VIN
PG
ON/OFF
1
IN
6
BST
9 _PG
R3
100K
11 _VCC
MP28262
7
EN/SYNC
2,3,4,5
SW
8
FB
NC GND AGND
10
12,13 14
Rt
24.9K
R1
4.99K
R2
10K
Efficiency
V_OUT=1.2V
100
90 Vin=5V
80
70
60
Vin=12V
50
40
Vin=21V
30
20
10
0
0
0.5
1
1.5
2
OUTPUT CURRENT (A)
MP28262 Rev. 0.92
www.MonolithicPower.com
1
4/28/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.