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EL7563C

更新时间： 2024-11-19 22:50:59
品牌 Logo 应用领域
ELANTEC 稳压器
页数 文件大小 规格书
18页 1240K
描述
Monolithic 4 Amp DC:DC Step-down Regulator

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EL7563C 数据手册

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EL7563C  
Monolithic 4 Amp DC:DC Step-down Regulator  
Features  
General Description  
• Integrated synchronous MOSFETs  
and current mode controller  
• 4A continuous output current  
• Up to 95% efficiency  
• Internal patented current sense  
• Cycle-by-cycle current limit  
• 3V to 3.6V input voltage  
• Adjustable output voltage 1V to  
2.5V  
• Precision reference  
• ±0.5% load and line regulation  
• Adjustable switching frequency to  
1MHz  
The EL7563C is an integrated, full-featured synchronous step-down  
regulator with output voltage adjustable from 1.0V to 2.5V. It is capa-  
ble of delivering 4A continuous current at up to 95% efficiency. The  
EL7563C operates at a constant frequency pulse width modulation  
(PWM) mode, making external synchronization possible. Patented on-  
chip resistorless current sensing enables current mode control, which  
provides cycle-by-cycle current limiting, over-current protection, and  
excellent step load response. The EL7563C features power tracking,  
which makes the start-up sequencing of multiple converters possible.  
A junction temperature indicator conveniently monitors the silicon die  
temperature, saving the designer time on the tedious thermal charac-  
terization. The minimal external components and full functionality  
make this EL7563C ideal for desktop and portable applications.  
The EL7563C is specified for operation over the full -40°C to +85°C  
temperature range.  
• Oscillator synchronization  
possible  
• Internal soft-start  
• Over-voltage protection  
• Junction temperature indicator  
• Over-temperature protection  
• Under-voltage lockout  
• Multiple supply start-up tracking  
• Power-good indicator  
Typical Application Diagram (EL7563CM)  
C5  
1
2
3
4
5
6
7
8
9
CREF  
SGND  
COSC  
VS  
EN 20  
FB 19  
0.1µF  
C4  
• 20-pin SO (0.300”) package  
• 28-pin HTSSOP package  
PG 18  
D2  
D4  
390pF  
C2  
R4  
VDRV 17  
VHI 16  
Applications  
C3  
C8  
22W  
0.22µF  
D3  
0.22µF  
PSHR  
PGND  
PGND  
VIN  
• DSP, CPU Core, and I/O Supplies  
• Logic/Bus supplies  
• Portable equipment  
• DC:DC converter modules  
• GTL + Bus power supply  
2.2nF  
D1  
C7  
C6  
C9  
LX 15  
0.22µF  
0.1µF  
C1  
V
OUT  
LX 14  
L1  
330µF  
V
3.3V  
IN  
2.5V  
4A  
C10  
4.7µH  
PGNDP 13  
PGND 12  
PGND 11  
2.2nF R2  
1.54kW  
R1  
STP  
330µF  
1kW  
10 STN  
Ordering Information  
Tape &  
Reel  
EL7563CM  
Part No  
Package  
Outline #  
MDP0027  
MDP0027  
MDP0048  
MDP0048  
EL7563CM  
20-Pin SO (0.300”)  
20-Pin SO (0.300”)  
28-Pin HTSSOP  
28-Pin HTSSOP  
-
EL7563CM-T13  
EL7563CRE-T7  
EL7563CRE-T13  
13”  
7”  
13”  
Typical Application Diagrams continued on page 3  
Manufactured Under U.S. Patent No. 5,7323,974  
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these  
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.  
© 2001 Elantec Semiconductor, Inc.  
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