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SIC403A

更新时间： 2024-09-24 12:04:03
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威世 - VISHAY 稳压器
页数 文件大小 规格书
24页 1061K
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6 A microBUCK® SiC403A/B Integrated Buck Regulator with Programmable LDO

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SiC403A, SiC403BCD  
Vishay Siliconix  
6 A microBUCK® SiC403A/B  
Integrated Buck Regulator with Programmable LDO  
DESCRIPTION  
FEATURES  
•
•
•
•
•
•
•
•
•
•
•
•
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High efficiency > 93 %  
6 A continuous output current capability  
Integrated bootstrap switch  
The Vishay Siliconix SiC403A/B an advanced stand-alone  
synchronous buck regulator featuring integrated power  
MOSFETs, bootstrap switch, and a programmable LDO in a  
space-saving PowerPAK MLP55-32L pin packages.  
Programmable 200 mA LDO with bypass logic  
Temperature compensated current limit  
All ceramic solution enabled  
Pseudo fixed-frequency adaptive on-time control  
Programmable input UVLO threshold  
Independent enable pin for switcher and LDO  
Selectable ultra-sonic power-save mode (SiC403A)  
Selectable power-save mode (SiC403B)  
Programmable soft-start  
1 % internal reference voltage  
Power good output  
Over-voltage and under-voltage protections  
Material categorization: For definitions of compliance  
please see www.vishay.com/doc?99912  
The SiC403A/B is capable of operating with all ceramic  
solutions and switching frequencies up to 1 MHz. The  
programmable frequency, synchronous operation and  
selectable power-save allow operation at high efficiency  
across the full range of load current. The internal LDO may  
be used to supply 5 V for the gate drive circuits or it may be  
bypassed with an external 5 V for optimum efficiency.  
Additional features include cycle-by-cycle current limit,  
voltage soft-start, under-voltage protection, programmable  
over-current protection, soft shutdown and selectable  
power-save. The Vishay Siliconix SiC403A/B also provides  
an enable input and a power good output.  
PRODUCT SUMMARY  
Input Voltage Range  
Output Voltage Range  
Operating Frequency  
Continuous Output Current  
Peak Efficiency  
3 V to 28 V  
0.6 V to 5.5 V  
200 kHz to 1 MHz  
6 A  
APPLICATIONS  
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Notebook, desktop and server computers  
Digital HDTV and digital consumer applications  
Networking and telecommunication equipment  
Printers, DSL, and STB applications  
Embedded applications  
93 %  
Package  
PowerPAK MLP55-32L  
Point of load power supplies  
TYPICAL APPLICATION CIRCUIT AND PACKAGE OPTIONS  
EN/PSV (Tri-State)  
P
GOOD  
LDO_EN  
V
OUT  
31 30 29 28 27 26 25  
32  
V
OUT  
LX  
LX  
FB  
24  
23  
22  
21  
20  
19  
18  
17  
1
V
OUT  
PAD 1  
2
3
4
5
6
7
8
V
P
DD  
GND  
GND  
A
GND  
A
P
GND  
PAD 3  
LX  
P
P
P
FBL  
GND  
GND  
V
IN  
PAD 2  
V
IN  
SS  
V
IN  
GND  
GND  
BST  
P
Typical Application Circuit for SiC403A/B (PowerPAK MLP5x5-32L)  
Document Number: 62768  
S12-1972-Rev. A, 27-Aug-12  
For technical questions, contact: powerictechsupport@vishay.com  
This document is subject to change without notice.  
www.vishay.com  
1
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  
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