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EL7551CUZ

更新时间： 2024-11-05 04:40:27
品牌 Logo 应用领域
英特矽尔 - INTERSIL 稳压器开关光电二极管
页数 文件大小 规格书
9页 174K
描述
Monolithic 1Amp DC:DC Step-down Regulator

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EL7551CUZ 数据手册

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EL7551  
®
March 21, 2006  
FN7291.1  
Monolithic 1Amp DC:DC Step-down  
Regulator  
Features  
• Integrated synchronous MOSFETs and current mode  
controller  
The EL7551 is an integrated, synchronous step-down  
regulator with output voltage adjustable from 1.0V to 3.8V. It  
is capable of delivering 1A continuous current at up to 95%  
efficiency. The EL7551 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 EL7551 is  
available in a fused-lead 16-pin QSOP package. With proper  
external components, the whole converter fits into a less  
• 1A continuous output current  
• Up to 95% efficiency  
• 4.5V to 5.5V input voltage  
• Adjustable output from 1V to 3.8V  
• Cycle-by-cycle current limit  
• Precision reference  
• ±0.5% load and line regulation  
• Adjustable switching frequency to 1.2MHz  
• Oscillator synchronization possible  
• Internal soft start  
2
than 0.4 in area. The minimal external components and  
small size make this EL7551 ideal for desktop and portable  
applications.  
The EL7551 is specified for operation over the -40°C to  
+85°C temperature range.  
• Over temperature protection  
• Under voltage lockout  
Pinout  
• 16-pin QSOP package  
EL7551  
(16-PIN QSOP)  
TOP VIEW  
• Pb-free plus anneal available (RoHS compliant)  
Applications  
• DSP, CPU Core and IO Supplies  
• Logic/Bus Supplies  
1
2
3
4
5
6
7
8
SGND PGND 16  
C3 C4  
C5  
0.1µF 270pF  
COSC  
VDD  
PGND  
PGND  
VIN  
VREF 15  
FB 14  
0.1µF  
R3  
R2  
• Portable Equipment  
R1  
39Ω  
2.37kΩ  
• DC:DC Converter Modules  
• GTL + Bus Power Supply  
1kΩ  
VDRV 13  
LX 12  
L1  
C1  
10µH  
C
7
V
O
C6  
(3.3V,1A)  
10µF  
ceramic  
47µF  
LX 11  
Ordering Information  
0.1µF  
VIN  
VHI 10  
V
PART  
TAPE &  
REEL  
PKG.  
DWG. #  
IN  
(4.5V-5.5V)  
EN  
PGND  
9
PART NUMBER MARKING PACKAGE  
EL7551CU  
7551CU  
7551CU  
16-Pin QSOP  
16-Pin QSOP  
16-Pin QSOP  
-
7”  
13”  
-
MDP0040  
MDP0040  
MDP0040  
MDP0040  
EL7551CU-T7  
EL7551CU-T13 7551CU  
EL7551CUZ  
(See Note)  
7551CUZ 16-Pin QSOP  
(Pb-free)  
Manufactured under U.S. Patent No. 57,323,974  
EL7551CUZ-T7 7551CUZ 16-Pin QSOP  
(See Note) (Pb-free)  
7”  
MDP0040  
MDP0040  
EL7551CUZ-T13 7551CUZ 16-Pin QSOP  
(See Note) (Pb-free)  
13”  
NOTE: Intersil Pb-free plus anneal 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-020.  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright Intersil Americas Inc. 2002, 2003, 2006. All Rights Reserved  
1
All other trademarks mentioned are the property of their respective owners.  
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