BL1085
Dropout Voltage
(note 3)
Vin-Vout
ΔVout, ΔVref =1%，Iout=3A
Vin-Vout=3V, Tj=25℃
1.4
7
V
Current Limit
A
Ilimit
Minimum
Load Current
(note 4)
BL1085-ADJ
3
5
10
10
mA
mA
uA
dB
Quiescent
Current
Iq
Vin=10V
Adjust Pin Current
(Adjustable Version)
IAdj
2.85V ≤Vin≤4.25V, 10mA≤ Iout≤3A
45
120
Ripple
Rejection
F=120Hz,Cout=25uF( tan),
Iout=3A,Vin-Vout=3V
60
Adjust Pin
Current
Change
10mA≤Iout≤3A
1.5V≤Vin-Vout ≤6V
Ichange
0.4
10
µA
Temperature
Stability
Iout=10mA,
Vin-Vout=1.5V
0.5
%
Thermal
Resistance
junction to case
TO-252
TO-263
TO-220
12.5
3
3
JC
℃ / W
Over
Temperature
Protection
OTP
150
℃
Note1: Line Regulation and Load Regulation in Table1 are tested under constant junction temperature.
Note2: When load current varies between 0~3A and Vin-Vout ranges from 1.5V~6V at constant junction
temperature, the parameter is satisfied the criterion in table. If temperature varies between -40℃≤TA≤85℃，
it needs output current to be larger than 10mA to satisfy the criterion.
Note3: Dropout Voltage is the voltage difference between the input and output pin when the input voltage is
minimum to maintain the lowest spec output voltage.
Dropout Voltage is the voltage difference between the input and output pin under Iout=3A and the following
test condition:
1) Find out output voltage value ( denoted as Vout1) when Vin1=Vout+1.5V
2) Decrease input voltage until output voltage is equal to 98.5% of Vout1, and denote the Vin and Vout as
Vin2 and Vout2
.
3) Vdropout=Vin2-Vout2
.
Note4: Minimum Load Current is defined as the minimum output current necessary to maintain regulation.
Specified output accuracy can be met when the output current exceeds the minimum load current (10mA)
and the dropout voltage (Vin-Vout) lies between 1.5V and 6V.
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