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MP1477H

更新时间： 2024-11-25 17:02:07
品牌 Logo 应用领域
芯源 - MPS /
页数 文件大小 规格书
20页 873K
描述
17V、3A、1.2MHz 高效率同步降压变换器，采用 SOT563 封装

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中文翻译

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MP1477H 数据手册

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MP1477H  
17V, 3A, 1.2MHz, High-Efficiency,  
Synchronous, Step-Down Converter  
in a SOT563 Package  
DESCRIPTION  
FEATURES  
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.  
Wide 4.2V to 17V Operating Input Range  
58mΩ/25mΩ Low RDS(ON) Internal Power  
MOSFETs  
200µA Low IQ  
High-Efficiency  
Operation  
Synchronous  
Mode  
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  
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.  
APPLICATIONS  
Security Camera  
The MP1477H requires a minimal number of  
Digital Set-Top Boxes  
Flat-Panel Television and Monitors  
General Purposes  
readily  
available,  
standard,  
external  
components and is available in a space-saving  
SOT563 (1.6mmх1.6mm) package.  
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  
Efficiency  
VOUT = 3.3V, L = 1.5µH, DCR = 4.3mΩ  
R4  
10Ω  
C3  
100  
90  
80  
70  
60  
50  
40  
1μF  
12V  
VIN  
L1  
3.3V/3A  
VOUT  
1.5μH  
BST  
VIN  
SW  
R1  
40.2kΩ  
C1  
22μF  
C2  
22μF x 2  
30  
20  
10  
0
MP1477H FB  
Vin=5V  
Vin=12V  
Vin=16V  
R2  
13kΩ  
R3  
75kΩ  
EN  
EN  
GND  
0.01  
0.1  
1
10  
LOAD CURRENT(A)  
MP1477H Rev. 1.0  
11/10/2017  
www.MonolithicPower.com  
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.  
© 2017 MPS. All Rights Reserved.  
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