ACE555
400mA LDO Dropout Voltage Regulator
Technology
Recommended Work Conditions
Item
Min Nom Max Unit
Input Voltage Range
Ambient Temperature -50
18
V
OC
140
Electrical Characteristics
Symbol
Prameter
Condition
Min Typical Max Units
ACE555-1.8V
ACE555-2.5V
ACE555-2.85V
ACE555-3.3V
ACE555-5.0V
Vin=5V～15V
ACE555-5.0V
(Vin=7V~15V)
IL＝0～400mA
ΔVout, ΔVref,=1%，
Iout=400mA
1.764
2.45
1.80
2.5
2.85
3.3
5
1.836
2.55
2.907
3.366
5.1
V
V
V
V
V
%
Vout
Output Voltage
2.793
3.234
4.9
0.2
0.4
ΔVout
Line Regulation（note1）
0.2
0.4
%
ΔVout
Dropout
Voltage
Current
Limit
Load Regulatiion（note1,2）
Input-Output Voltage
0.2
0.4
1.3
%
V
1.22
Differentia（note3）
mA
mA
%
Max Load Current
Vin-Vout=2V, Tj=25℃
600
4
8
Iq
Quiescent Current
ΔVout/
ΔT∙Vout
Temperature Stability
0.5
Note：1.The Parameters of Line Regulation and Load Regulation in Table1 are tested under constant junction temperature. The
Curve of Load Regulation vs. Temperature is shown in typical parameter curve that follows.
2.When Iout varies between 0~400mA,Vin-Vout varies between 1.5V~12V under constant junction temperature，the
parameter is satisfied the criterion in table. If temperature varies between -50℃≤TA≤140℃，it needs output current to be
larger than 10mA to satisfy the criterion.
3.Dropout Voltage is specified over the full output current range of the device, and it is tested under 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.
4.Minimum Load Current is defined as the minimum output current required to maintain regulation. When
1.5V≦Vin-Vout≦12V，the device is guaranteed to regulate if the output current is greater than 10mA.
VER 1.2
3
ACE [ ACE TECHNOLOGY CO., LTD. ]
