MP1477
17V, 3A, 800kHz, High-Efficiency,
Synchronous, Step-Down Converter
with COT Control in SOT563 Package
DESCRIPTION
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
shutdown.
The MP1477 requires a minimal number of
readily
available,
standard,
external
components and is available in a space-saving
SOT563 (1.6mmх1.6mm) package.
FEATURES
Wide 4.2V to 17V Operating Input Range
58mΩ/27mΩ Low R
DS(ON)
Internal Power
MOSFETs
200µA Low I
Q
Current
High-Efficiency Synchronous Mode
Operation
Power Save Mode (PSM) at Light Load
Fast Load Transient Response
800kHz Switching Frequency
Internal Soft Start (SS)
Over-Current Protection (OCP) and Hiccup
Thermal Shutdown
Output Adjustable from 0.8V
Available in a SOT563 (1.6mmх1.6mm)
Package
APPLICATIONS
Security Cameras
Digital Set-Top Boxes
Flat-Panel Televisions and Monitors
General Purposes
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
R4
10Ω
12V
VIN
VIN
C1
22μF
C3
1μF
BST
L1
2.2μH
SW
R1
40.2kΩ
3.3V/3A
VOUT
C2
22μF x 2
MP1477
EN
FB
R3
75kΩ
R2
13kΩ
EN
GND
MP1477 Rev. 1.0
9/12/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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