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SIC779_12

更新时间: 2024-11-21 12:22:47
品牌 Logo 应用领域
威世 - VISHAY 服务器主板节能技术
页数 文件大小 规格书
17页 369K
描述
Integrated DrMOS Power Stage

SIC779_12 数据手册

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SiC779  
Vishay Siliconix  
Integrated DrMOS Power Stage  
FEATURES  
DESCRIPTION  
Industry benchmark Gen III MOSFETs with  
The SiC779 is an integrated solution that contains PWM  
optimized n-channel MOSFETs (high side and low side) and  
a full featured MOSFET driver IC. The device complies with  
the Intel DrMOS standard for desktop and server Vcore power  
stages. The SiC779 delivers up to 40 A continuous output  
current and operates from an input voltage range of 3 V to  
16 V. The integrated MOSFETs are optimized for output  
voltages in the ranges of 0.8 V to 2.0 V with a nominal input  
voltage of 12 V. The device can also deliver very high power  
at 5 V output for ASIC applications.  
integrated Schottky diode  
DrMOS compliant gate driver IC  
Enables Vcore switching at 1 MHz  
Easily achieve > 93 % efficiency in multi-phase,  
low output voltage solutions  
Low ringing on the VSWH pin reduces EMI  
Pin compatible with DrMOS 6 x 6 version 4.0  
Tri-state PWM input function prevents negative output  
voltage swing  
The SiC779 incorporates an advanced MOSFET gate driver  
IC. This IC accepts a single PWM input from the VR controller  
and converts it into the high side and low side MOSFET gate  
drive signals. The driver IC is designed to implement the skip  
mode (SMOD) function for light load efficiency improvement.  
Adaptive dead time control also works to improve efficiency  
at all load points. The SiC779 has a thermal warning (THDN)  
that alerts the system of excessive junction temperature. The  
driver IC includes an enable pin, UVLO and shoot through  
protection.  
The SiC779 is optimized for high frequency buck  
applications. Operating frequencies in excess of 1 MHz can  
easily be achieved.  
The SiC779 is packaged in Vishay Siliconix high  
performance PowerPAK MLP 6 x 6 package. Compact  
co-packaging of components helps to reduce stray  
inductance, and hence increases efficiency.  
5 V logic levels on PWM  
MOSFET threshold voltage optimized for 5 V driver bias  
supply  
Automatic skip mode operation (SMOD) for light load  
efficiency  
Under-voltage lockout  
Built-in bootstrap schottky diode  
Adaptive deadtime and shoot through protection  
Thermal shutdown warning flag  
Low profile, thermally enhanced PowerPAK® MLP 6 x 6  
40 pin package  
Halogen-free according to IEC 61249-2-21 definition  
Compliant to RoHS Directive 2002/95/EC  
APPLICATIONS  
CPU and GPU core voltage regulation  
Server, computer, workstation, game console, graphics  
boards, PC  
SiC779 APPLICATION DIAGRAM  
5 V  
V
IN  
V
CIN  
SMOD  
DSBL#  
PWM  
BOOT  
V
SWH  
V
O
PHASE  
THDN  
SiC779CD  
Figure 1  
Document Number: 67538  
S11-0703-Rev. B, 18-Apr-11  
www.vishay.com  
1
This document is subject to change without notice.  
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000  

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