MP173
700 V Non-Isolated Off-Line Regulator
Up to 280 mA Output Current
The Future of Analog IC Technology
DESCRIPTION
MP173 is a primary-side regulator that provides
accurate constant voltage (CV) regulation
without an opto-coupler. It supports buck, boost,
buck-boost, and flyback topologies. It has an
integrated 700 V MOSFET to simplify the
structure and reduce cost. These features make
it an ideal regulator for offline, low-power
applications, such as home appliances and
standby power.
MP173 is a green-mode-operation regulator.
Both the peak current and switching frequency
decrease as the load decreases. This feature
provides excellent efficiency at light load and
improves the overall average efficiency.
MP173 has various protection features
including thermal shutdown (TSD), VCC under-
voltage lockout (UVLO), overload protection
(OLP), short-circuit protection (SCP), and open-
loop protection.
MP173 is available in a small TSOT23-5
package and SOIC-8 package.
FEATURES
Primary-Side CV Control, Supporting Buck,
Boost, Buck-Boost, and Flyback Topologies
Integrated 700 V MOSFET and Current
Source
< 30 mW No-Load Power Consumption
Up to 4 W Output Power
Maximum DCM Output Current Less than
180 mA
Maximum CCM Output Current Less than
280 mA
Low VCC Operating Current
Frequency Foldback
Limited Maximum Frequency
Peak-Current Compression
Internally Biased VCC
TSD, UVLO, OLP, SCP, Open-Loop
Protection
Home Appliances, White Goods, and
Consumer Electronics
Industrial Controls
Standby Power
APPLICATIONS
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For
MPS green status, please visit the MPS website under Quality Assurance. “MPS”
and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
L
DRAIN
VCC
D2
C2
R1
C3
R2
L1
VOUT
D1
C4
GND
MP173
SOURCE
FB
SOURCE
Input
C1
N
MP173 Rev. 1.0
8/19/2015
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
1
MPS [ MONOLITHIC POWER SYSTEMS ]
