Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UZ1085
3A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR
REGULATOR

TO-220
1
TO-220F
1
FEATURES
*Fast transient response
*Low dropout voltage at up to 3A
*Load regulation:0.05% typical
*Trimmed current limit
*On-chip thermal limiting

1
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
TO-252
1
TO-263-3
1
TO-263
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-TF3-T
UZ1085G-xx-TF3-T
TO-220F
A/G
O
I
UZ1085L-xx-TN3-R
UZ1085G-xx-TN3-R
TO-252
A/G
O
I
UZ1085L-xx-TQ2-T
UZ1085G-xx-TQ2-T
TO-263
A/G
O
I
UZ1085L-xx-TQ2-R
UZ1085G-xx-TQ2-R
TO-263
A/G
O
I
UZ1085L-xx-TQ3-T
UZ1085G-xx-TQ3-T
TO-263-3
A/G
O
I
UZ1085L-xx-TQ3-R
UZ1085G-xx-TQ3-R
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: VOUT, I: VIN
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Copyright © 2014 Unisonic Technologies Co., Ltd
Packing
Tube
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
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UZ1085

MARKING INFORMATION
PACKAGE
TO-220
TO-220F
TO-252
TO-263
TO-263-3

LINEAR INTEGRATED CIRCUIT
VOLTAGE CODE
15 :1.5V
18 :1.8V
25 :2.5V
33 :3.3V
50 :5.0V
AD:ADJ
MARKING
Lot Code
Voltage Code
UTC
UZ1085
XX
L: Lead Free
G: Halogen Free
Date Code
1
BLOCK DIAGRAM
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UZ1085

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
18
V
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-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-220F
TO-263/ TO-263-3
TO-252
TO-220/TO-263
Junction to Case
TO-263-3
TO-220F

SYMBOL
RATINGS
118
θJA
UNIT
°C/W
62
12
4
θJC
°C/W
7.6
ELECTRICAL CHARACTERISTICS (TA=25°C, COUT=22μF, unless otherwise specified.)
For UZ1085-ADJ (Adjustable)
PARAMETER
SYMBOL
Reference Voltage
VREF
Line Regulation
△VOUT
Load Regulation
△VOUT
Dropout Voltage
VD
Current Limit
ILIMIT
Adjust Pin Current
IADJ
Adjust Pin Current Change
△IADJ
Minimum Load Current
IO(MIN)
Quiescent Current
IQ
Ripple Rejection
RR
Thermal Regulation
Temperature Stability
VOUT
Long-Term Stability
VOUT
Output Noise(% of VOUT)
eN
Thermal Shutdown
TEST CONDITIONS
1.5V≤(VIN - VOUT) ≤8.25V,10mA≤IOUT≤3A
(VOUT +1.5V) ≤VIN≤12V, IOUT=10mA
(VIN - VOUT)=3V, 10mA≤IOUT≤3A
△VREF%=1%, lOUT=3A
(VIN-VOUT)=2V
1.5V≤ (VIN - VOUT) ≤12V, 10mA≤IOUT≤3A
1.5V≤ (VIN-VOUT) ≤12V
VIN=12V
f=120Hz,Tantalum,(VIN–VOUT)=3V IOUT=3A
TA=25°C,30ms pulse
TA=125°C, 1000hr
TA=25°C,10Hz≤f≤10kHz
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.225
3.1
60
TYP MAX
1.25 1.275
0.005
0.2
0.05
0.5
1.30
1.40
4
35
120
0.2
5
10
4
13
72
0.004 0.02
0.5
0.03
1.0
0.003
150
UNIT
V
%
%
V
A
μA
μA
mA
mA
dB
%/W
%
%
%
°C
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ELECTRICAL CHARACTERISTICS (TA=25°C, COUT=22μF, unless otherwise specified.)
For UZ1085-xx (Fixed Voltage)
PARAMETER
SYMBOL
UZ1085-15
UZ1085-18
Output Voltage UZ1085-25
VOUT
UZ1085-33
UZ1085-50
Line Regulation
△VOUT
Load Regulation
△VOUT
Dropout Voltage
VD
Current Limit
ILIMIT
Minimum Load Current
IO(MIN)
Quiescent Current
IQ
Ripple Rejection
RR
Thermal Regulation
Temperature Stability
△VOUT
Long-Term Stability
△VOUT
Output Noise(% of VOUT)
eN
Thermal shutdown
TEST CONDITIONS
3.0V≤VIN≤8.5V, 10mA≤IOUT≤3A
3.3V≤VIN≤8.8V, 10mA≤IOUT≤3A
4.0V≤VIN≤9.5V, 10mA≤IOUT≤3A
4.8V≤VIN≤10.3V, 10mA≤IOUT≤3A
6.5V≤VIN≤12V, 10mA≤IOUT≤3A
(VOUT +1.5V) ≤VIN≤12V,IOUT=10mA
(VIN – VOUT)=3V, 10mA≦IOUT≤3A
△VREF%=1%, lOUT=3A
(VIN-VOUT)=2V
1.5V≤ (VIN-VOUT) ≤12V
VIN=12V
f=120Hz, Tantalum, (VIN -VOUT)=3V,IOUT=3A
TA=25°C,30ms pulse
TA=125°C, 1000hr
TA=25°C,10Hz≤f≤10kHz
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.470
1.764
2.450
3.234
4.900
3.1
60
TYP
1.5
1.8
2.5
3.3
5.0
0.005
0.05
1.30
4
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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UZ1085

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
UZ1085-3.3
VOUT
VIN
VIN=9V
22μF
+
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GND
3.3V at 3A
+
22μF
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Reference Voltage (V)
Reference Voltage (V)
Output Voltage Deviation (%)
Dropout Voltage (V)

Adjust Pin Current (μA)
Minmum Load Current (mA)
UZ1085
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Ripple Rejections (dB)
Short-Circuit Current (A)

Maximum Power Dissipation
20
15
10
5
0
0
50
60 70
50
10
0
15
0
80 90 100 110 120 130 140 150
Case Temperature (°C)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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