UNISONIC TECHNOLOGIES CO., LTD
UZ1085
3A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR
REGULATOR
DESCRIPTION
The UTC
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
FEATURES
*Fast transient response
*Low dropout voltage at up to 3A
*Load regulation:0.05% typical
*Trimmed current limit
*On-chip thermal limiting
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Lead Free
Halogen Free
1
2
3
UZ1085L-xx-TA3-T
UZ1085G-xx-TA3-T
TO-220
A/G
O
I
UZ1085L-xx-TN3-R
UZ1085G-xx-TN3-R
TO-252
A/G
O
I
UZ1085L-xx-TQ2-R
UZ1085G-xx-TQ2-R
TO-263
A/G
O
I
UZ1085L-xx-TQ2-T
UZ1085G-xx-TQ2-T
TO-263
A/G
O
I
UZ1085L-xx-TQ3-R
UZ1085G-xx-TQ3-R
TO-263-3
A/G
O
I
UZ1085L-xx-TQ3-T
UZ1085G-xx-TQ3-T
TO-263-3
A/G
O
I
Note: 1. xx: Output Voltage, refer to Marking Information.
2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator), O: V
OUT
, I: V
IN
Packing
Tube
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
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QW-R102-013,H
UZ1085
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
15 :1.5V
18 :1.8V
25 :2.5V
33 :3.3V
50 :5.0V
AD:ADJ
LINEAR INTEGRATED CIRCUIT
MARKING
TO-220
TO-252
TO-263
TO-263-3
LOT Code
Voltage Code
UTC
UZ1085
XX
1
2
3
L: Lead Free
G: Halogen Free
Date Code
BLOCK DIAGRAM
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QW-R102-013,H
UZ1085
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
V
IN
LINEAR INTEGRATED CIRCUIT
RATINGS
18
See Fig.1
UNIT
V
Input Voltage
(V
IN
- V
OUT
) ×I
OUT
Junction Temperature
T
J
+125
°C
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-40 ~ +150
°C
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.
THERMAL DATA
PARAMETER
TO-252
Junction to Ambient
TO-220/ TO-263
Junction to Case
TO-252
TO-220/ TO-263
SYMBOL
θ
JA
θ
JC
RATINGS
118
62
12
4
UNIT
°C/W
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, C
OUT
=22μF, unless otherwise specified.)
For UZ1085-ADJ (Adjustable)
PARAMETER
SYMBOL
Reference Voltage
V
REF
△V
OUT
Line Regulation
△V
OUT
Load Regulation
Dropout Voltage
V
D
Current Limit
I
LIMIT
Adjust Pin Current
I
ADJ
△I
ADJ
Adjust Pin Current Change
Minimum Load Current
I
O(MIN)
Quiescent Current
I
Q
Ripple Rejection
RR
Thermal Regulation
Temperature Stability
ΔV
OUT
Long-Term Stability
ΔV
OUT
Output Noise(% of V
OUT
)
eN
Thermal Shutdown
For UZ1085-xx (Fixed Voltage)
PARAMETER
SYMBOL
UZ1085-15
UZ1085-18
Output Voltage UZ1085-25
V
OUT
UZ1085-33
UZ1085-50
△V
OUT
Line Regulation
△V
OUT
Load Regulation
Dropout Voltage
V
D
Current Limit
I
LIMIT
Minimum Load Current
I
O(MIN)
Quiescent Current
I
Q
Ripple Rejection
RR
Thermal Regulation
△V
OUT
Temperature Stability
△V
OUT
Long-Term Stability
Output Noise(% of V
OUT
)
eN
Thermal shutdown
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
T
A
=25°C,30ms pulse
T
A
=125°C, 1000hr
T
A
=25°C,10Hz≤f≤10kHz
MIN TYP MAX
1.225 1.25 1.275
0.005
0.2
0.05
0.5
1.30
1.40
3.1
4
35
120
0.2
5
10
4
13
60
72
0.004 0.02
0.5
0.03
1.0
0.003
150
MIN
1.470
1.764
2.450
3.234
4.900
TYP
1.5
1.8
2.5
3.3
5.0
0.005
0.05
1.30
4
UNIT
V
%
%
V
A
μA
μA
mA
mA
dB
%/W
%
%
%
°C
TEST CONDITIONS
3.0V≤V
IN
≤8.5V,
10mA≤I
OUT
≤3A
3.3V≤V
IN
≤8.8V,
10mA≤I
OUT
≤3A
4.0V≤V
IN
≤9.5V,
10mA≤I
OUT
≤3A
4.8V≤V
IN
≤10.3V,
10mA≤I
OUT
≤3A
6.5V≤V
IN
≤12V,
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
V
IN
=12V
f=120Hz, Tantalum, (V
IN
-V
OUT
)=3V,I
OUT
=3A
T
A
=25°C,30ms pulse
T
A
=125°C, 1000hr
T
A
=25°C,10Hz≤f≤10kHz
3.1
60
MAX UNIT
1.530
V
1.830
V
2.550
V
3.366
V
5.100
V
0.2
%
0.5
%
1.40
V
A
10
mA
4
13
mA
72
dB
0.004 0.02 %/W
0.5
%
0.03
1.0
%
0.003
%
150
°C
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QW-R102-013,H
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
UZ1085
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R102-013,H
UZ1085
Minmum Load Current (mA)
Reference Voltage (V)
Dropout Voltage (V)
TYPICAL CHARACTERISTICS
UNISONIC TECHNOLOGIES CO., LTD
Reference Voltage (V)
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Output Voltage Deviation (%)
Adjust Pin Current (μA)
5 of 6
LINEAR INTEGRATED CIRCUIT
QW-R102-013,H
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