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PDF ACE1085 Data sheet ( Hoja de datos )
| Número de pieza | ACE1085 | |
| Descripción | 3A Low Dropout Linear Regulator | |
| Fabricantes | ACE Technology | |
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ACE1085
Technology
3A Low Dropout Linear Regulator
Description
ACE1085 is a series of low dropout three terminal regulators with a dropout of 1.3V at 3A load current.
Other than a fixed version (Vout＝1.8V,2.5V,3.3V,5.0V）, ACE1085 has an adjustable version, The
adjustable version can set the output voltage with two external resistors.
ACE1085 offers thermal shut down and current limit functions, to assure the stability of chip and power
system. And it uses trimming technique to guarantee output voltage accuracy within ±2％.
The ACE1085 series is available in standard packages of TO-263-2L, TO-263-3L, TO-220 and TO-252.
Features
● Other than a fixed version and an adjustable version, output value can be customized on command.
● Maximum output current is 3A
● Output voltage accuracy is within ±2％ （±1％ Customized）
● Range of operation input voltage: Max 18V
● Line regulation: 0.2％ (Typical)
● Load regulation: 0.2％ (Typical)
● Environment Temperature: -50℃~140℃
Application
● Power Management for Computer Mother Board, Graphic Card
● Battery Charger
● Post Regulators for Switching Supplies
● Microprocessor Supply
Absolute Maximum Ratings
Parameter
Symbol Max Unit
Input voltage
VIN 18 V
Junction temperature
TJ
150 OC
Environment Temperature TA
140 OC
Storage temperature
TS - 65 to 150 OC
Packaging Type
TO-220
TO-263-3L
TO-263-2L
TO-252
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VER 1.2 1
1 page  
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ACE1085
Technology
3A Low Dropout Linear Regulator
ACE1085
Typical application of ACE1085
Application Hints
1. Recommend using 10uF tan capacitor as bypass capacitor for all application circuit.
2. Recommend using 22uF tan capacitor to assure circuit stability.
3. Using a bypass capacitor(CAdj) between the adjust terminal and ground can improve ripple rejection,
This bypass capacitor prevents ripple from being amplified as the output voltage is increased. The
impedance of CAdj should be less than the resistor’s(R1) which is between output and adjust pins to
prevent ripple from being amplified at any ripple frequency. As R1 is normally in the range of
120Ω~200Ω,the value of CAdj should satisfy this equation: 2*Fripple*CAdj<R1. Recommend using 10uF
tan capacitor.
Output Voltage of Adjustable Version
The ACE1085 adjustable version provide 1.25V Reference Voltage. Any output voltage between
1.25V~13.8V can be available by choosing two external resistors (connection method is shown in chart 1).
In chart 1, R1,R2 is the two external resistors.
Explanation
The output voltage of adjustable version satisfies this followed equation:
Vout=VRef*(1+R2/R1)+IAdj*R2. We can ignore IAdj because IAdj(about 50uA) is much less than the
current of R1(about 4mA).
How to choose R1：The value of R1 should be in the range of 120Ω～200Ω to assure chip working
normally without any load. To assure the electrical performance showed in table 1, the output current
should be larger than 5mA. If R1 is too large, the minimum output current should be larger than 4mA , The
best working condition is to assure that the output current exceeds 10mA.
VER 1.2 5
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ACE1085
Technology
3A Low Dropout Linear Regulator
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.2 11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ACE1085.PDF ] | |
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