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EL7571CMZ-T13

更新时间： 2024-11-17 22:36:47
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英特矽尔 - INTERSIL 控制器
页数 文件大小 规格书
19页 309K
描述
Programmable PWM Controller

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EL7571CMZ-T13 数据手册

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EL7571  
®
Data Sheet  
October 25, 2004  
FN7298.1  
Programmable PWM Controller  
Features  
The EL7571 is a flexible, high efficiency, current mode, PWM  
step down controller. It incorporates five bit DAC adjustable  
output voltage control which conforms to the Intel Voltage  
Regulation Module (VRM) Specification for Pentium® II and  
Pentium® Pro class processors. The controller employs  
synchronous rectification to deliver efficiencies greater than  
90% over a wide range of supply voltages and load  
conditions. The on-board oscillator frequency is externally  
adjustable, or may be slaved to a system clock, allowing  
optimization of RFI performance in critical applications. In  
single supply operation, the high side FET driver supports  
boot-strapped operation. For maximum flexibility, system  
operation is possible from either a 5V rail, a single 12V rail,  
or dual supply rails with the controller operating from 12V  
and the power FETs from 5V.  
• Pentium® II Compatible  
• 5 bit DAC Controlled Output Voltage  
• Greater than 90% Efficiency  
• 4.5V to 12.6V Input Range  
• Dual NMOS Power FET Drivers  
• Fixed frequency, Current Mode Control  
• Adjustable Oscillator with External Sync. Capability  
• Synchronous Switching  
• Internal Soft-Start  
• User Adjustable Slope Compensation  
• Pulse by Pulse Current Limiting  
• 1% Typical Output Accuracy  
• Power Good Signal  
Pinout  
R2  
5Ω  
D1  
• Output Power Down  
• Over Voltage Protection  
C6 0.1µF  
ENABLE  
1
2
3
4
5
6
7
8
9
OTEN  
CSLOPE  
COSC  
REF  
VH1 20  
HSD 19  
LX 18  
L2  
C3 240pF  
C3 240pF  
• Pb-Free Available (RoHS Compliant)  
4.5V  
to  
12.6V  
1.5µH  
C1  
C8  
Q1  
1µF 1000µ  
F x3  
Applications  
V
OUT  
1.3V to  
3.5V  
1.4V  
• Pentium® II Voltage Regulation Modules (VRMs)  
• PC Motherboards  
C3  
VIN 17  
L1  
R2  
5Ω  
0.1µF  
5.1µH  
C2  
C7  
PWRGD  
VIDO  
VINP 16  
LSD 15  
GNDP 14  
GND 13  
CS 12  
POWER  
GOOD  
1µF  
1000µF  
x6  
• DC/DC Converters  
Q2  
D2  
• GTL Bus Termination  
VID1  
Voltage  
I.D. (VID  
(0:4))  
• Secondary Regulation  
VID2  
VID3  
Ordering Information  
10 VID4  
FB 11  
TAPE AND  
PART NUMBER  
EL7571CM  
PACKAGE  
20-Pin SO  
20-Pin SO  
REEL  
PKG. DWG. #  
MDP0027  
Q1, Q2: Siliconix, Si4410, x2  
C1: Sanyo, 16MV 1000GX, 1000µF x3  
C2: Sanyo, 6MV 1000GX, 1000µF x6  
L1: Pulse Engineering, PE-53700, 5.1µH  
L2: Micrometals, T30-26, 7T AWG #20, 1.5µH  
R1: Dale, WSL-25-12, 15mΩ, x2  
D1: BAV99  
-
13”  
-
EL7571CM-T13  
MDP0027  
EL7571CMZ  
(See Note)  
20-Pin SO  
(Pb-free)  
MDP0027  
D2: IR, 32CTQ030  
EL7571CMZ-T13  
(See Note)  
20-Pin SO  
(Pb-free)  
13”  
MDP0027  
NOTE: Intersil Pb-free products employ special Pb-free material  
sets; molding compounds/die attach materials and 100% matte tin  
plate termination finish, which are RoHS compliant and compatible  
with both SnPb and Pb-free soldering operations. Intersil Pb-free  
products are MSL classified at Pb-free peak reflow temperatures that  
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020C.  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2003-2004. All Rights Reserved.  
1
All other trademarks mentioned are the property of their respective owners.  
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