MP1477 Datasheet: Step-Down Converter





MP1477 Step-Down Converter Datasheet

Part Number MP1477
Description Step-Down Converter
Manufacture MPS
Total Page 19 Pages
PDF Download Download MP1477 Datasheet PDF

Features: MP1477 17V, 3A, 800kHz, High-Efficiency, Synchronous, Step-Down Converter with COT Control in SOT563 Package DESCRIPT ION The MP1477 is a fully integrated, h ighfrequency, synchronous, rectified, s tep-down, switch-mode converter with in ternal power MOSFETs. The MP1477 offers a very compact solution that achieves 3A of continuous output current with ex cellent load and line regulation over a wide input range. The MP1477 uses sync hronous mode operation for higher effic iency over the output current-load rang e. Constant-on-time (COT) control opera tion provides very fast transient respo nse, easy loop design, and very tight o utput regulation. Full protection featu res include short-circuit protection (S CP), over-current protection (OCP), und er-voltage protection (UVP), and therma l shutdown. The MP1477 requires a minim al number of readily available, standar d, external components and is available in a space-saving SOT563 (1.6mmх1.6mm ) package. TYPICAL APPLICATION FEATURES  Wide 4.2V to 17V Oper.

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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.
TYPICAL APPLICATION
FEATURES
Wide 4.2V to 17V Operating Input Range
58mΩ/27Low RDS(ON) Internal Power
MOSFETs
200µA Low IQ 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.
12V
VIN
C1
22μF
EN
R4
10Ω
VIN BST SW
MP1477 FB
EN GND
C3
1μF
L1
2.2μH
R1
40.2kΩ
R3 R2
75kΩ 13kΩ
3.3V/3A
VOUT
C2
22μF x 2
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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