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參數(shù)資料
| 型號： | SPX1581U-2.5 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| 中文描述： | 5A條超低壓降穩(wěn)壓器快速響應(yīng)，可調(diào) |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 81K |
| 代理商： | SPX1581U-2.5 |
1
Date 5/25/04
SPX1581 5A Ultra Low Dropout Voltage Regulator
Copyright 2004 Sipex Corporation
SPX1581
DESCRIPTION
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
■
Standard 5-Terminal Low Cost TO-220 and TO-263
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
a lower dropout, fast transient response to regulate from 3.3V and 5V supplies. The SPX1581 is also an excellent choice
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.
5A Ultra Low Dropout Voltage Regulator
Fast Response, Adjustable & Fixed
APPLICATIONS
■
3.3V to 2.8V ATX Power Supplies
■
3.3V to 2.9V for Portable PENTIUM
TM
Processor
■
5V to 3.5V VRE Supply
■
High efficiency "Green" Computer Systems
1
3
2
5
4
SPX1581
5 Pin TO-263
S
A
V
O
V
C
V
I
3
2
1
SPX1581
5 Pin TO-220
S
A
V
O
V
C
V
I
4
5
C4
μ
F
2.5V
V
OUT
R1
R2
V
OUT
SENSE
C2
10
μ
F
V
CTRL
C1
μ
F
3.3V
V
IN
5V
V
CTRL
SPX1581
5
4
2
3
1
(1) V
CTRL
needed when V
IN
< 5V.
(2) V
OUT
= V
(1+R
/R
)+I
R
.
(3) V
REF
is measured across adjust to sense.
ADJ
V
IN
C3
μ
F
C4
μ
F
2.5V
V
OUT
V
OUT
SENSE
C2
10
μ
F
V
CTRL
C1
330
μ
F
3.3V
V
IN
5V
V
CTRL
SPX1581
5
4
2
3
1
(1) V
CTRL
needed when V
IN
< 5V.
GND
V
IN
Typical Fixed Regulator
Adjustable Regulator
TYPICAL APPLICATIONS CIRCUIT
Now Available in Lead Free Packaging
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPX1581T-2.8 | 5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1582T-2.5 | 3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1582T-2.8 | 3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1582T-3.3 | 3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1582T5 | 3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX1581U-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1581U5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1581U5-2.5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1581U5-2.8 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
| SPX1581U5-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed |
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