MP28257 Datasheet: Synchronous Step-Down Converter





MP28257 Synchronous Step-Down Converter Datasheet

Part Number MP28257
Description Synchronous Step-Down Converter
Manufacture MPS
Total Page 16 Pages
PDF Download Download MP28257 Datasheet PDF

Features: The Future of Analog IC Technology DESCR IPTION The MP28257 is a fully-integrate d, synchronous, step-down, switch-mode converter with a programmable frequency . It offers a very compact solution tha t can provide up to 4A of continuous ou tput current over a wide input supply r ange with excellent load and line regul ation, and can operate at high efficien cy over a wide output current load rang e. Constant-on-time control mode provid es fast transient response and eases lo op stabilization. Protections include s hort-circuit protection, over-current p rotection, over-voltage protection, und er-voltage protection, and thermal shut down. The MP28257 requires a minimal n umber of readily-available standard ext ernal components. The device is availab le in a space saving 2mmx3mm QFN12 pack age that complies with ROHS. MP28257 4 A, Fast Transient, 4.2V-to-20V Input Sy nchronous Step-Down Converter 2mmx3mm Q FN12 FEATURES  Wide 4.2V-to-20V Oper ating Input Range  4A Continuous Output Current  Internal 120mΩ.

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The Future of Analog IC Technology
DESCRIPTION
The MP28257 is a fully-integrated,
synchronous, step-down, switch-mode
converter with a programmable frequency. It
offers a very compact solution that can provide
up to 4A of 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 control mode provides fast
transient response and eases loop stabilization.
Protections include short-circuit protection,
over-current protection, over-voltage protection,
under-voltage protection, and thermal shut
down.
The MP28257 requires a minimal number of
readily-available standard external components.
The device is available in a space saving
2mmx3mm QFN12 package that complies with
ROHS.
MP28257
4A, Fast Transient, 4.2V-to-20V Input
Synchronous Step-Down Converter
2mmx3mm QFN12
FEATURES
Wide 4.2V-to-20V Operating Input Range
4A Continuous Output Current
Internal 120mHigh-Side, 50mLow-
Side Power MOSFETs
Stable with Ceramic Output Capacitors
Proprietary Switching Loss-Reduction
Technology
Power-Good Indicator
Soft Startup/Shutdown
Programmable Switching Frequency
SCP, OCP, OVP, UVP Protection and
Thermal Shutdown
Output Adjustable from 0.815V to 13V
Available in a 2mmx3mm QFN12
Package
APPLICATIONS
Networking Systems
Distributed Power Systems
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
MP28257 Rev 1.0
11/8/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
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