ace1085 ACE Technology Co., LTD., ace1085 Datasheet - Page 4

• Manufacturer Part Number: ace1085
• Description: 3a Low Dropout Linear Regulator
• Manufacturer: ACE Technology Co., LTD.

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 -50 ≤
satisfy the criterion.
Note3:Dropout Voltage is tested
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.
Detailed Description
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.
safety when the environment temperature is larger than 140 ℃ or output current is larger than 3.2A.
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.
ACE1085 is a series of low dropout voltage, three terminal regulators. Its application circuit is very simple:
The thermal shut down and current limit modules can assure chip and its application system working
The bandgap module provides stable reference voltage, whose temperature coefficient is compensated
junction to case
Vin
Resistance
Thermal
When 1.5V≦Vin-Vout≦6V，the device is guaranteed to regulate if the output current is greater than 10mA.
10uF
Tan
Vout=Vref * (1+R2/R1)+Iadj * R2
θ
JC
Vin
Technology
under Iout=3A and
ACE1085
ADJ
Vout
125 ohm
the following testing conditions: First step is to find out the Vout
TO-252
TO-263
TO-220
R2
R1
℃ TA≤140℃，it needs output current to be larger than 10mA to
3A Low Dropout Linear Regulator
22uF
Tan
Vout
12.5
3
3
ACE1085
VER 1.2
/W
℃
4