MP28259 Datasheet: Synchronous Step-Down Converter





MP28259 Synchronous Step-Down Converter Datasheet

Part Number MP28259
Description Synchronous Step-Down Converter
Manufacture MPS
Total Page 18 Pages
PDF Download Download MP28259 Datasheet PDF

Features: The Future of Analog IC Technology MP28 259 High Efficiency, Fast Transient, 2A , 4.2V-20V Input Synchronous Step-down Converter in QFN12 (2x3mm) DESCRIPTION The MP28259 is a fully-integrated sync hronous, rectified, step-down switch mo de converter with programmable frequenc y. It offers a very compact solution th at can achieve a 2A continuous output c urrent over a wide input supply range w ith excellent load and line regulation, and can operate at high efficiency ove r a wide output current load range. Con stant-On-Time (COT) control mode provid es fast transient response and eases lo op stabilization. Full protection featu res include SCP, OCP, OVP, UVP, and the rmal shut down. The MP28259 requires a minimal number of readily-available sta ndard external components. The device i s available in a space saving 2mmx3mm 1 2-pin QFN package. FEATURES • Wide 4 .2V to 20V Operating Input Range • 2A Output Current • Low RDS(ON) Interna l Power MOSFETs • Proprietary Switching Loss Reduction Technique • Po.

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The Future of Analog IC Technology
MP28259
High Efficiency, Fast Transient, 2A,
4.2V-20V Input Synchronous
Step-down Converter in QFN12 (2x3mm)
DESCRIPTION
The MP28259 is a fully-integrated synchronous,
rectified, step-down switch mode converter with
programmable frequency. It offers a very
compact solution that can achieve a 2A
continuous output current over a wide input
supply range with excellent load and line
regulation, and can operate at high efficiency
over a wide output current load range.
Constant-On-Time (COT) control mode
provides fast transient response and eases loop
stabilization.
Full protection features include SCP, OCP, OVP,
UVP, and thermal shut down.
The MP28259 requires a minimal number of
readily-available standard external components.
The device is available in a space saving
2mmx3mm 12-pin QFN package.
FEATURES
Wide 4.2V to 20V Operating Input Range
2A Output Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
Power-Good Indicator in QFN Package
Soft Shutdown
Programmable Switching Frequency
OCP, SCP, OVP, UVP Protection and
Thermal Shutdown
Optional OCP Protection: Latch-Off Mode
and Hiccup Mode
Output Adjustable from 0.815V to 13V
Available in a QFN12 (2mmx3mm) Package
APPLICATIONS
Networking Systems
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
VIN
4.2V - 20V R7
C1
C5
9 IN
3
BST
C3
MP28259
8 FREQ
4 VCC
2, 10
SW
OFF ON EN
5
EN
6
PG
FB 7
GND
1, 11, 12
L1
R4 C4
220pF
R1
VOUT
1.2V
C2
R2
MP28259 Rev. 1.34
www.MonolithicPower.com
4/27/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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