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SiC437DED-T1-GE3

更新时间： 2024-11-25 00:54:31
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威世 - VISHAY /
页数 文件大小 规格书
25页 2516K
描述
Synchronous Buck Regulators 28 V Input, 12 A (SiC437) and 8 A (SiC438)

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SiC437DED-T1-GE3 数据手册

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SiC437, SiC438  
www.vishay.com  
Vishay Siliconix  
Synchronous Buck Regulators  
28 V Input, 12 A (SiC437) and 8 A (SiC438)  
FEATURES  
• Versatile  
- Operation from 3 V to 28 V input voltage  
(4.5 V to 28 V using single supply)  
- Adjustable output voltage down to 0.6 V  
- Scalable solution 8 A (SiC438), 12 A (SiC437),  
and 24 A (SiC431)  
- Output voltage tracking and sequencing with  
pre-bias start up  
DESCRIPTION  
-
1 % output voltage accuracy at -40 °C to +125 °C  
The SiC43x family of devices are synchronous buck  
regulators with integrated high side and low side  
power MOSFETs. Its power stage is capable of supplying  
12 A (SiC437) and 8 A (SiC438) continuous current at up to  
1 MHz switching frequency. This regulator produces an  
adjustable output voltage down to 0.6 V from 3 V to 28 V  
input rail to accommodate  
including computing, consumer electronics, telecom, and  
industrial.  
SiC437’s and SiC438’s architecture delivers ultrafast  
transient response with minimum output capacitance and  
tight ripple regulation at very light load. The device is  
internally compensated and is stable with any capacitor. No  
external ESR network is required for loop stability purposes.  
The device also incorporates a power saving scheme that  
significantly increases light load efficiency.  
The regulator family integrates a full protection feature set,  
including output overvoltage protection (OVP), cycle by  
cycle overcurrent protection (OCP) short circuit protection  
(SCP) and thermal shutdown (OTP). It also has UVLO and a  
user programmable soft start.  
• Highly efficient  
- 97 % peak efficiency  
- 1 μA supply current at shutdown  
- 50 μA operating current not switching  
• Highly configurable  
- Four programmable switching frequencies available:  
300 kHz, 500 kHz, 750 kHz, and 1 MHz  
- Adjustable soft start (4.5 ms / 9 ms) and adjustable  
current limit  
- Three modes of operation  
- Forced continuous conduction, power save (SiC43xB),  
or ultrasonic (SiC43xA)  
• Robust and reliable  
- Cycle-by-cycle current limit  
- Output overvoltage protection  
- Output undervoltage / short circuit protection with auto  
retry  
a variety of applications,  
- Power good flag and over temperature protection  
• Design tools  
The SiC437 and SiC438 are available in lead (Pb)-free power  
enhanced MLP-24L package in 4 mm x 4 mm dimension.  
-
Supported by Vishay PowerCAD Online Design  
Simulation (www.vishay.com/power-ics/powercad-list/)  
APPLICATIONS  
- Evaluation board (www.vishay.com/doc?#####)  
• 5 V, 12 V, and 24 V input rail POLs  
• Desktop, notebooks, server, and industrial computing  
• Industrial and automation  
• consumer electronics  
TYPICAL APPLICATION CIRCUIT AND PACKAGE OPTIONS  
100  
88  
INPUT  
3.0 VDC to 24 VDC  
76  
64  
52  
40  
28  
16  
4
BOOT  
VOUT = 1.2 V, L = 0.56 μH  
VOUT = 5 V, L = 1.5 μH  
CBOOT  
VIN  
Phase  
VOUT  
SiC43x  
SW  
GL  
VDD  
VDRV  
CIN  
Complete converter efficiency  
IN = VIN x IIN  
MODE 1  
MODE 2  
VOUT  
VFB  
P
POUT = VOUT x IOUT  
measured at output capacitor  
RUP  
RDOWN  
COUT  
0.001  
0.01  
0.1  
1
10  
Output Current, IOUT (A)  
Fig. 1 - Typical Application Circuit  
Fig. 2 - Efficiency vs. Output Current  
(VIN = 12 V, fsw = 500 kHz, Power Saving Mode)  
S18-0030-Rev. B, 15-Jan-18  
Document Number: 75921  
1
For technical questions, contact: powerictechsupport@vishay.com  
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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