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SPX1581U5-L-3.3 PDF预览

SPX1581U5-L-3.3

更新时间： 2024-11-16 14:44:55
品牌 Logo 应用领域
西伯斯 - SIPEX /
页数 文件大小 规格书
7页 89K
描述
Fixed Positive LDO Regulator, 3.3V, 0.5V Dropout, PSFM5, LEAD FREE, TO-220AC, 5 PIN

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SPX1581U5-L-3.3 技术参数

是否Rohs认证：符合生命周期：Obsolete
包装说明：LEAD FREE, TO-220AC, 5 PINReach Compliance Code：unknown
风险等级：5.17Is Samacsys：N
最大回动电压 1：0.5 V最大输入电压：5.5 V
最小输入电压：1.75 VJESD-30 代码：R-PSFM-T5
JESD-609代码：e3功能数量：1
端子数量：5工作温度TJ-Max：125 °C
工作温度TJ-Min：最大输出电流 1：5 A
最大输出电压 1：3.432 V最小输出电压 1：3.168 V
标称输出电压 1：3.3 V封装主体材料：PLASTIC/EPOXY
封装形状：RECTANGULAR封装形式：FLANGE MOUNT
峰值回流温度（摄氏度）：NOT APPLICABLE认证状态：Not Qualified
调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR表面贴装：NO
端子面层：Matte Tin (Sn)端子形式：THROUGH-HOLE
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT APPLICABLE
Base Number Matches：1

SPX1581U5-L-3.3 数据手册

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®
SPX1581  
5A Ultra Low Dropout Voltage Regulator  
Fast Response, Adjustable & Fixed  
FEATURES  
■Low Dropout Voltage 500mV at 5A Full Load Current  
■Adjustable Ouput Down to 1.2V from ATX Power Supply  
■Fixed Output Voltages of 3.3V, 2.8V and 2.5V  
■Extremely Tight Load and Line Regulation  
SPX1581  
5 Pin TO-263  
SPX1581  
5 Pin TO-220  
1
2 3 4 5  
4
5
1
2
3
■Standard 5-Terminal Low Cost TO-220 and TO-263  
APPLICATIONS  
■3.3V to 2.8V ATX Power Supplies  
■3.3V to 2.9V for Portable PENTIUMTM Processor  
■5V to 3.5V VRE Supply  
■High efficiency "Green" Computer Systems  
Now Available in Lead Free Packaging  
DESCRIPTION  
The SPX1581 is a 5A Low Dropout Regulator with extremely low dropout voltage. The adjustable version requires only  
two external resistors to set the output voltage. The fixed version has a preset output of 3.3V, 2.8V or 2.5V and does  
not require any external resistors. The SPX1581 features a low dropout of 400mV(Typ.) and offers fast transient  
response. This device is suitable for Pentium applications requiring 2.8V, 2.5V from 3.3V ATX power supplies, where  
a low current input voltage 1V greater than the output voltage is needed. With an external sense pin the load regulation  
is less than 1mV. This device is an excellent choice for the use of powering low voltage microprocessors that require  
alowerdropout,fasttransientresponsetoregulatefrom3.3Vand5Vsupplies.TheSPX1581isalsoanexcellentchoice  
as a post regulator for switching supplies applications.  
The SPX1581 offers protection against over-current faults, reversed input polarity, over temperature operation and  
positive and negative transient voltage.  
The SPX1581 is offered in a 5 pin TO-220 and TO-263 compatible with industry standard 5-terminal regulators. For  
7A, 3A and 1.5A ultra low dropout versions refer to SPX1580, SPX1582 and SPX1583 data sheets respectively.  
TYPICAL APPLICATIONS CIRCUIT  
V
V
OUT  
IN  
2.5V  
OUT  
3.3V  
IN  
5
4
3
V
V
SPX1581  
C1  
330µF  
VIN  
VOUT  
2.5V  
VOUT  
3.3V  
VIN  
5
4
3
5V  
V
SPX1581  
1
C1  
330µF  
2
V
CTRL  
CTRL  
SENSE  
5V  
VCTRL  
1
2
VCTRL  
SENSE  
R1  
124Ω  
ADJ  
C4  
2x330µF  
GND  
C2  
10µF  
C4  
2x330µF  
C2  
10µF  
C3  
.033µF  
R2  
124Ω  
(1) VCTRL needed when VIN < 5V.  
(1) V  
(2) V  
(3) V  
needed when V < 5V.  
IN  
CTRL  
OUT  
REF  
= V  
(1+R /R )+I  
R .  
REF  
2
1
ADJ  
2
is measured across adjust to sense.  
Adjustable Regulator  
Typical Fixed Regulator  
Date: 1/21/05  
SPX1581 5A Ultra Low Dropout Voltage Regulator  
©Copyright 2005 Sipex Corporation  
1
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