MP28128 Datasheet: Step-Down Converter





MP28128 Step-Down Converter Datasheet

Part Number MP28128
Description Step-Down Converter
Manufacture MPS
Total Page 11 Pages
PDF Download Download MP28128 Datasheet PDF

Features: The Future of Analog IC Technology DESCR IPTION The MP28128 is a 1.5MHz fixed fr equency PWM synchronous step-down regul ator with internal compensation. MP2812 8 operates from a 2.7V to 6V input and generates an adjustable output voltage from 0.8V to 0.9xVIN at up to 2.5A load current. The MP28128 integrates an 80m Ω high-side switch and a 60mΩ synch ronous rectifier for high efficiency wi thout an external Schottky diode. With peak current mode control and internal compensation, the MP28128 based solutio n delivers a very compact footprint wit h a minimum component count. Fault cond ition protection includes hiccup short- circuit protection, cycle-by-cycle curr ent limiting and thermal shutdown. Othe r features include frequency synchroniz ation input, internal softstart and pow er good output. The MP28128 is availabl e in a small 3mm x 3mm 10-lead QFN pack age. TYPICAL APPLICATION VIN POK OFF O N IN POK BS SW MP28128 EN/SYNC GND FB C3 100nF MP28128 2.5A, 1.5MHz Synchronous Step-Down Converter.

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The Future of Analog IC Technology
DESCRIPTION
The MP28128 is a 1.5MHz fixed frequency
PWM synchronous step-down regulator with
internal compensation. MP28128 operates from
a 2.7V to 6V input and generates an adjustable
output voltage from 0.8V to 0.9xVIN at up to
2.5A load current.
The MP28128 integrates an 80mhigh-side
switch and a 60msynchronous rectifier for
high efficiency without an external Schottky
diode. With peak current mode control and
internal compensation, the MP28128 based
solution delivers a very compact footprint with a
minimum component count. Fault condition
protection includes hiccup short-circuit
protection, cycle-by-cycle current limiting and
thermal shutdown. Other features include
frequency synchronization input, internal soft-
start and power good output.
The MP28128 is available in a small 3mm x
3mm 10-lead QFN package.
TYPICAL APPLICATION
VIN
POK
OFF ON
IN
POK
BS
SW
MP28128
EN/SYNC
GND
FB
C3
100nF
MP28128
2.5A, 1.5MHz Synchronous
Step-Down Converter
FEATURES
2.5A Output Current
Input Operation Range: 2.7V to 6V
1.5% Output Accuracy
Internal Power MOSFET Switches
All Ceramic Capacitor Design
1.5MHz Fixed Switching Frequency
Internal Soft-Start
Frequency Synchronization Input
Power Good Output
Cycle-by-Cycle Current Limiting
Thermal Shutdown
3mm x 3mm 10-lead QFN Package
APPLICATIONS
µP/ASIC/DSP/FPGA Core and I/O Supplies
Printers and LCD TVs
Network and Telecom Equipment
Point of Load Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
VOUT
1.8V / 2.5A
Efficiency vs.
Output Current
95
90
85 5V to 1.8V 5V to 3.3V
5V to 2.5V
80
75
70
0 0.5 1 1.5 2 2.5
OUTPUT CURRENT (A)
MP28128 Rev. 0.92
www.MonolithicPower.com
1/6/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
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