UNISONIC TECHNOLOGIES CO., LTD
UZ1085
3A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR
REGULATOR
DESCRIPTION
The
UZ1085-xx
series are low dropout three-terminal
regulators with 3A output current capability. These devices have
been optimized for low voltage applications including VTT bus
termination, where transient response and minimum input
voltage are critical.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limiting provides
protection against any combination of overload and ambient
temperature that would create excessive junction temperatures.
LINEAR INTEGRATED CIRCUIT
1
1
TO-252
TO-220
1
1
TO-263
TO-263-3
FEATURES
*Fast transient response
*Low dropout voltage at up to 3A
*Load regulation:0.05% typical
*Trimmed current limit
*On-chip thermal limiting
Lead-free:
UZ1085L-xx
Halogen-free: UZ1085G-xx
ORDERING INFORMATION
Normal
UZ1085-xx-TA3-T
UZ1085-xx-TN3-R
UZ1085-xx-TN3-T
UZ1085-xx-TQ2-R
UZ1085-xx-TQ2-T
UZ1085-xx-TQ3-R
UZ1085-xx-TQ3-T
Ordering Number
Lead Free
Halogen Free
UZ1085L-xx-TA3-T UZ1085G-xx-TA3-T
UZ1085L-xx-TN3-R UZ1085G-xx-TN3-R
UZ1085L-xx-TN3-T UZ1085G-xx-TN3-T
UZ1085L-xx-TQ2-R UZ1085G-xx-TQ2-R
UZ1085L-xx-TQ2-T UZ1085G-xx-TQ2-T
UZ1085L-xx-TQ3-R UZ1085G-xx-TQ3-R
UZ1085L-xx-TQ3-T UZ1085G-xx-TQ3-T
Package
TO-220
TO-252
TO-252
TO-263
TO-263
TO-263-3
TO-263-3
Pin Assignment
1
2
3
A/G
O
I
A/G
O
I
A/G
O
I
A/G
O
I
A/G
O
I
A/G
O
I
A/G
O
I
Packing
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
Note: 1. xx: Output Voltage, refer to Marking Information.
2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator)
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Copyright © 2008 Unisonic Technologies Co., Ltd
1 of 6
QW-R102-013,F
UZ1085
ABSOLUTE MAXIMUM RATINGS
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
V
IN
RATINGS
UNIT
Input Voltage
18
V
(V
IN
– V
OUT
) * I
OUT
See Figure 1
℃
Junction Temperature
T
J
+125
℃
Operating Temperature
T
OPR
-20 ~ +85
℃
Storage Temperature
T
STG
-40 ~ +150
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
(Ta=25℃, C
OUT
=22μF, unless otherwise specified.)
For UZ1085-ADJ(Adjustable)
PARAMETER
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
Ripple Rejection
Thermal Regulation
Temperature Stability
Long-Term Stability
Output Noise(% of V
OUT
)
Thermal Shutdown
For UZ1085-xx(Fixed Voltage)
PARAMETER
SYMBOL
TEST CONDITIONS
3.0V≤V
IN
≤8.5V,
10mA≤I
OUT
≤3A
UZ1085-15
3.3V≤V
IN
≤8.8V,
10mA≤I
OUT
≤3A
UZ1085-18
Output Voltage
V
OUT
4.0V≤V
IN
≤9.5V,
10mA≤I
OUT
≤3A
UZ1085-25
4.8V≦V
IN
≦10.3V,
10mA≦I
OUT
≦3A
UZ1085-33
6.5V≦V
IN
≦12V,
10mA≦I
OUT
≦3A
UZ1085-50
Line Regulation
ΔV
OUT
(V
OUT
+1.5V)≦V
IN
≦12V,I
OUT
=10mA
Load Regulation
ΔV
OUT
(V
IN
– V
OUT
)=3V, 10mA≦I
OUT
≦3A
△V
REF
%=1%, l
OUT
=3A
Dropout Voltage
V
D
Current Limit
I
LIMIT
(V
IN
-V
OUT
)=2V
Minimum Load Current
I
O(MIN)
1.5V≦(V
IN
-V
OUT
)≦12V
Quiescent Current
I
Q
V
IN
=12V
f=120Hz, Tantalum,
Ripple Rejection
RR
(V
IN
– V
OUT
)=3V,I
OUT
=3A
Ta=25℃,30ms pulse
Thermal Regulation
Temperature Stability
ΔV
OUT
Ta=125℃, 1000hr
Long-Term Stability
Output Noise(% of V
OUT
)
Thermal shutdown
ΔV
OUT
eN
Ta=25℃,10Hz≦f≦10kHz
MIN. TYP. MAX. UNIT
1.470 1.5 1.530
1.764 1.8 1.830
V
2.450 2.5 2.550
3.234 3.3 3.366
4.900 5.0 5.100
0.005 0.2
%
0.05
0.5
%
1.30 1.40
V
3.1
4
A
10
mA
4
13
mA
60
72
0.004
0.5
0.03
0.003
150
0.02
1.0
dB
%/W
%
%
%
°C
SYMBOL
V
REF
ΔV
OUT
ΔV
OUT
V
D
I
LIMIT
Iadj
ΔIadj
I
O(MIN)
I
Q
RR
ΔV
OUT
ΔV
OUT
eN
TEST CONDITIONS
1.5V≦(V
IN
– V
OUT
)≦8.25V
10mA≦I
OUT
≦3A
(V
OUT
+1.5V)
≦V
IN
≦12V,
I
OUT
=10mA
(V
IN
– V
OUT
)=3V, 10mA≦I
OUT
≦3A
△V
REF
%=1%, l
OUT
=3A
(V
IN
-V
OUT
)=2V
1.5V≦（V
IN
– V
OUT
）≦12V，
10mA≦I
OUT
≦3A
1.5V≦(V
IN
-V
OUT
)≦12V
V
IN
=12V
f=120Hz,Tantalum,(V
IN
–V
OUT
)=3V
I
OUT
=3A
Ta=25℃,30ms pulse
Ta=125℃, 1000hr
Ta=25℃,10Hz≦f≦10kHz
MIN.
1.225
TYP.
1.25
0.005
0.05
1.30
4
35
0.2
4
60
72
0.004
0.5
0.03
0.003
150
0.02
1.0
MAX. UNIT
1.275
0.2
0.5
1.40
120
5
10
13
V
%
%
V
A
μA
μA
mA
mA
dB
%/W
%
%
%
°C
3.1
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 6
QW-R102-013,F
UZ1085
TYPICAL CHARACTERISTICS
LINEAR INTEGRATED CIRCUIT
4
1.5
1.4
1.
3
1.
2
1.1
1.0
0.9
0.8
0.7
0
50
4
6
8
10
0
10
12
15
0
14
0.6
0.5
0
0.5
1
1.5
2
2.5
3.0
T=25℃
2
1
0
0
2
V
IN
-V
OUT
(V)
Dropout Voltage (V)
3
I
OUT
(Amps)
Output Current (A)
Figure 2. Dropout Voltage vs.Output Current
Figure 1. Absolute Maximum Sate Operating Area
0.10
Output Voltage Deviation (%)
0.05
1.260
△I=3A
1.255
Reference Voltage (V)
1.250
1.245
1.240
1.235
1.230
1.225
1.220
1.215
0
-0.05
-0.10
-0.15
-0.20
-75 -50 -25
0
25 50 75 100 125 150175
1.210
-75 -50 -25
0
25
50 75 100 125 150 175
Junction Temperature (℃)
Figure 3. Load Regulation vs.Temperature
Junction Temperature (℃)
Figure 4. Reference Voltage vs.Temperature
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Minmum Load Current (mA)
Reference Voltage (V)
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QW-R102-013,F
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