MP1477H Datasheet: Step-Down Converter





MP1477H Step-Down Converter Datasheet

Part Number MP1477H
Description Step-Down Converter
Manufacture MPS
Total Page 20 Pages
PDF Download Download MP1477H Datasheet PDF

Features: MP1477H 17V, 3A, 1.2MHz, High-Efficiency , Synchronous, Step-Down Converter in a SOT563 Package DESCRIPTION The MP1477 H is a fully integrated, highfrequency, synchronous, rectified, step-down, swi tch-mode converter with internal power MOSFETs. The MP1477H offers a very comp act solution that achieves 3A of contin uous output current with excellent load and line regulation over a wide input range. The MP1477H uses synchronous-mod e operation for higher efficiency over the output current-load range. Constant -on-time (COT) control operation provid es very fast transient response, easy l oop design, and very tight output regul ation. Full protection features include short-circuit protection (SCP), over-c urrent protection (OCP), under-voltage protection (UVP), and thermal shutdown. The MP1477H requires a minimal number of readily available, standard, externa l components and is available in a spac e-saving SOT563 (1.6mmх1.6mm) package. FEATURES  Wide 4.2V to 17V Operating Input Range  58mΩ/25mΩ .

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MP1477H
17V, 3A, 1.2MHz, High-Efficiency,
Synchronous, Step-Down Converter
in a SOT563 Package
DESCRIPTION
The MP1477H is a fully integrated, high-
frequency, synchronous, rectified, step-down,
switch-mode converter with internal power
MOSFETs. The MP1477H offers a very
compact solution that achieves 3A of
continuous output current with excellent load
and line regulation over a wide input range. The
MP1477H 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 MP1477H 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/25Low RDS(ON) Internal Power
MOSFETs
200µA Low IQ
High-Efficiency Synchronous Mode
Operation
Forced PWM Mode Operation
Fast Load Transient Response
1.2MHz 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 Camera
Digital Set-Top Boxes
Flat-Panel Television 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
12V
VIN
C1
22μF
EN
R4
10Ω
VIN BST SW
MP1477H FB
EN GND
C3
1μF
L1
1.5μH
R1
40.2kΩ
R3 R2
75kΩ 13kΩ
3.3V/3A
VOUT
C2
22μF x 2
Efficiency
VOUT = 3.3V, L = 1.5µH, DCR = 4.3mΩ
100
90
80
70
60
50
40
30 Vin=5V
20 Vin=12V
10 Vin=16V
0
0.01 0.1 1 10
LOAD CURRENT(A)
MP1477H Rev. 1.0
www.MonolithicPower.com
11/10/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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