ACE1085 Datasheet PDF - ACE Technology

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ACE1085
ACE Technology

Part Number ACE1085
Description 3A Low Dropout Linear Regulator
Page 11 Pages


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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 (Vout1.8V,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% (±1Customized
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
123
123
123
123
VER 1.2 1 



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ACE1085                                                                                                                                                                           
                                              Technology
3A Low Dropout Linear Regulator
Fixed Version
Pin Symbol
1 GND
2 Vout
3 Vin
Definition
Ground
Output
Input
Adjustable Version
Pin Symbol Definition
1 ADJ Adjustable
2 Vout
Output
3 Vin
Input
Ordering information
Selection Guide
ACE1085 XX XX + H
Halogen - free
Pb - free
1WM : TO-263-2
2WM : TO-263-3L
YM : TO-252
ZM : TO-220
Output Voltage :
1.8V / 2.5V ….. 5.0V / Default: Adjustable Version
Block Diagram
Recommended Work Conditions
Item
Min Nom Max Unit
Input Voltage Range
18 V
Environment Temperature -50
140
VER 1.2 2



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ACE1085                                                                                                                                                                           
                                              Technology
3A Low Dropout Linear Regulator
Electrical Characteristics
Parameter
Reference
Voltage
Symbol
Vref
Output Voltage
Vout
Line Regulation
(Note1)
ΔVout
Load Regulation
(Note1,2)
ΔVout
Dropout Voltage
(Note3)
Current Limit
Minimum Load
Current (Note4)
Quiescent
Current
Adjust Pin
Current
(Adjustable
Version)
Vin-Vout
llimit
Iq
IAdj
Test Conditions
Iout=10mA,Vin-Vout=3V,
10mAIout3A ,1.5VVin-Vout5V
ACE1085-1.80V, Iout=0mA,Vin=4.8V,Tj=25
10mAIout3A ,3.4VVin7V
ACE1085-2.50V, Iout=0mA,Vin=4.8V,Tj=25
10mAIout3A ,4.1VVin7V
ACE1085-3.3V,Iout=0mA,Vin=6.3V,Tj=25
10mA Iout3A ,4.9VVin8V
ACE1085-5.0V, Iout=0mA,Vin=8.0V,Tj=25
10mA Iout3A ,6.6VVin10V
ACE1085-ADJ,Iout=10mA , 2.85VVin10V
ACE1085-1.8V, Iout=10mA, 3.4VVin10V
ACE1085-2.5V, Iout=10mA, 4.1VVin10V
ACE1085-3.3V, Iout=10mA, 4.9VVin10V
ACE1085-5.0V, Iout=10mA, 6.6VVin10V
ACE1085-ADJ, Vin-Vout=3V, 10mAIout3A
ACE1085-1.8V, Vin-Vout=3V, 0Iout3A
ACE1085-2.5V, Vin-Vout=3V, 0Iout3A
ACE1085-3.3V, Vin-Vout=3V, 0Iout3A
ACE1085-5.0V, Vin-Vout=3V, 0Iout3A
ΔVout, ΔVref =1%Iout=3A
Vin-Vout=3V, Tj=25
ACE1085-ADJ
Vin=10V
Vin=4.25V,Iout=10mA
Min
1.238
1.225
1.782
1.764
2.475
2.45
3.267
3.234
4.95
4.90
Typ
1.25
1.25
1.80
1.80
2.50
2.50
3.3
3.3
5.0
5.0
0.035
1
1
1
1
0.2
3
3
3
3
TJ=25
Mum Unit
1.262
1.275
V
1.818
1.836
V
2.525
2.55
V
3.333
3.366
V
5.05
5.10
V
0.2 mV
5 mV 
5 mV 
5 mV 
5 mV 
0.4 %
15 mV 
15 mV 
15 mV 
15 mV 
1.3 1.5 V
3.2 4.5
A
3 10 mV
4 10 mV
45 110 uA
Adjust Pin
Current Change
Temperature
Stability
Ripple
Rejection
Ichange
F=120Hz,Cout=25uF( tan),Iout=3A,Vin-Vout=3V
10mAIout3A, 1.5VVin-Vout 6V
Iout=10mA, Vin-Vout=1.5V
dB
0.2 5 uA
0.5 %
VER 1.2 3



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ACE1085                                                                                                                                                                           
                                              Technology
3A Low Dropout Linear Regulator
Thermal
Resistance
junction to case
θJC
TO-252
TO-263
TO-220
12.5
3
3
/W
Note1:The Parameters of Line Regulation and Load Regulation in Table1 are tested under constant junction temperature.
Note2:When Iout varies between 0~3A,Vin-Vout varies between 1.5V~6V under constant junction temperature, the parameter is
satisfied the criterion in table. If temperature varies between -50TA140it needs output current to be larger than 10mA to
satisfy the criterion.
Note3:Dropout Voltage is tested under Iout=3A and the following testing conditions: First step is to find out the Vout
value(Vout1) when Vin1=Vout+1.5V, second step is to decrease Vin(Vin2) until Vout value is equal to 99%*Vout1(Vout2).
Vdropout=Vin2-Vout2.
Note4:Minimum Load Current is defined as the minimum output current required to maintain regulation.
When 1.5VVin-Vout6Vthe device is guaranteed to regulate if the output current is greater than 10mA.
Detailed Description
ACE1085 is a series of low dropout voltage, three terminal regulators. Its application circuit is very simple:
the fixed version only needs two capacitors and the adjustable version only needs two resistors and two
capacitors to work. It is composed of some modules including start-up circuit, bias circuit, bandgap,
thermal shutdown, current limit, power transistors and its driver circuit and so on.
The thermal shut down and current limit modules can assure chip and its application system working
safety when the environment temperature is larger than 140or output current is larger than 3.2A.
The bandgap module provides stable reference voltage, whose temperature coefficient is compensated
by careful design considerations. The temperature coefficient is under 100ppm/.And the accuracy of
output voltage is guaranteed by trimming technique.
Typical Application Circuit
ACE1085 has an adjustable version and fixed versions, Chart 1 is its typical application.
Vin
10uF
Tan
ACE1085
Vin Vout
ADJ
125 ohm
R1
R2
Vout
22uF
Tan
Vout=Vref * (1+R2/R1)+Iadj * R2
VER 1.2 4



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