17V, 3A, 800kHz, High-Efficiency,
Synchronous, Step-Down Converter
with COT Control in SOT563 Package
The MP1477 is a fully integrated, high-
frequency, synchronous, rectified, step-down,
switch-mode converter with internal power
MOSFETs. The MP1477 offers a very compact
solution that achieves 3A of continuous output
current with excellent load and line regulation
over a wide input range. The MP1477 uses
synchronous mode operation for higher
efficiency over the output current-load range.
Constant-on-time (COT) control operation
provides very fast transient response, easy loop
design, and very tight output regulation.
Full protection features include short-circuit
protection (SCP), over-current protection (OCP),
under-voltage protection (UVP), and thermal
The MP1477 requires a minimal number of
readily available, standard, external
components and is available in a space-saving
SOT563 (1.6mmх1.6mm) package.
Wide 4.2V to 17V Operating Input Range
58mΩ/27mΩ Low RDS(ON) Internal Power
200µA Low IQ Current
High-Efficiency Synchronous Mode
Power Save Mode (PSM) at Light Load
Fast Load Transient Response
800kHz Switching Frequency
Internal Soft Start (SS)
Over-Current Protection (OCP) and Hiccup
Output Adjustable from 0.8V
Available in a SOT563 (1.6mmх1.6mm)
Digital Set-Top Boxes
Flat-Panel Televisions and Monitors
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.
VIN BST SW
22μF x 2
MP1477 Rev. 1.0
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