UNISONIC TECHNOLOGIES CO., LTD
UZ1086
1.5A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR
REGULATOR
DESCRIPTION
The UTC
UZ1086
and
UZ1086-1.8V,
2.5V, 2.85V, 3.3V and 5V
are low dropout three-terminal regulators with 1.5A output current
capability. These devices have been optimized for low voltage where
transient response and minimum input voltage are critical. The 2.85V
version is designed specifically to be used in Active Terminators for
SCSI bus.
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
temperatures that would create excessive junction temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current of the
UZ1086
flows into the load, increasing efficiency.
LINEAR INTEGRATED CIRCUIT
FEATURES
*Low dropout voltage
*Load regulation: 0.05% typical
*Trimmed current limit
*On-chip thermal limiting
*Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V, 3.3V, 5V
Lead-free:
UZ1086L-xx
Halogen-free: UZ1086G-xx
ORDERING INFORMATION
Ordering Number
Package
Normal
Lead Free
Halogen-Free
UZ1086-xx-AA3-R UZ1086L-xx-AA3-R UZ1086G-xx-AA3-R
SOT-223
UZ1086-xx-TA3-T
UZ1086L-xx-TA3-T UZ1086G-xx-TA3-T
TO-220
UZ1086-xx-TN3-R UZ1086L-xx-TN3-R UZ1086G-xx-TN3-R
TO-252
UZ1086-xx-TQ2-R UZ1086L-xx-TQ2-R UZ1086G-xx-TQ2-R
TO-263
UZ1086-xx-TQ2-T UZ1086L-xx-TQ2-T UZ1086G-xx-TQ2-T
TO-263
UZ1086-xx-TQ3-R UZ1086L-xx-TQ3-R UZ1086G-xx-TQ3-R TO-263-3
UZ1086-xx-TQ3-T UZ1086L-xx-TQ3-T UZ1086G-xx-TQ3-T TO-263-3
Note: 1. xx: Output Voltage, refer to Marking Information.
2. A: ADJ (for adjustable regulator), G: GND (for fixed regulator)
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
Tape Reel
Tube
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
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QW-R102-008,J
UZ1086
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
LINEAR INTEGRATED CIRCUIT
MARKING
TO-220
TO-252
TO-263
TO-263-3
18
25
2J
33
50
AD
:1.8V
:2.5V
:2.85V
:3.3V
:5.0V
:ADJ
LOT Code
Voltage Code
UTC
UZ1086
XX
1
2
3
L: Lead Free
G: Halogen Free
Date Code
UZ1086
Voltage Code
XX
1
2
3
SOT-223
L: Lead Free
G: Halogen Free
Date Code
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QW-R102-008,J
UZ1086
ABSOLUTE MAXIMUM RATINGS
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
7.5
V
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 Case
TO-220
TO-263
SOT-223
θ
JC
SYMBOL
RATINGS
12
4
4
15
UNIT
°C/W
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(V
IN
≤7V,
T
J
=25°C, unless otherwise specified.)
PARAMETER
Reference Voltage
UZ1086-1.8
UZ1086-2.5
Output Voltage
UZ1086-2.85
UZ1086-3.3
UZ1086-5.0
Line Regulation (Note1,2)
Load Regulation (Note1,2)
Dropout Voltage
Current Limit
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
Ripple Rejection
SYMBOL
V
REF
*
*
*
*
*
*
*
*
*
*
*
TEST CONDITIONS
1.5V≤ (V
IN
-V
OUT
)
≤5.75V
10mA≤I
OUT
≤1A
3.3V≤V
IN
≤7V
4V≤V
IN
≤7V
10mA≤I
OUT
≤1A
4.35V≤V
IN
≤7V
4.8V≤V
IN
≤7V
6.5V≤V
IN
≤7V
(V
OUT
+1.5V)
≤V
IN
≤7V,I
OUT
=10mA
V
IN
-V
OUT
=2V, 10mA≤I
OUT
≤1A
I
OUT
=1.5A
V
IN
-V
OUT
=2V
MIN. TYP. MAX. UNIT
1.225 1.25 1.275
1.764
2.450
2.793
3.234
4.900
1.80
2.50
2.85
3.30
5.00
0.005
0.05
1.30
2
35
0.2
4
60
72
1.836
2.550
2.907
3.366
5.100
0.2
0.5
1.50
120
5
10
13
V
V
V
V
V
V
%
%
V
A
μA
μA
mA
mA
dB
V
OUT
ΔV
OUT
ΔV
OUT
V
D
I
LIMIT
Iadj
ΔIadj
Io(min)
I
Q
RR
1.6
Thermal Regulation
0.004 0.02 %/W
Temperature Stability
ΔV
OUT
0.5
%
Long-Term Stability
ΔV
OUT
0.03 1.0
%
RMS Output Noise
V
OUT
0.003
%
Thermal shutdown
155
°C
Thermal Shutdown Hysteresis
10
°C
Note:
* stand for specifications which apply over the designed operating temperature range.
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line
regulation are measured at a constant junction temperature by low duty cycle pulse testing.
2. Line and load regulation are guaranteed up to the maximum power dissipation. Power dissipation is
determined by input/output differential and the output current. Guaranteed maximum output power will not
be available over the full input/output voltage range.
1.5V≤ (V
IN
- V
OUT
)
≤5.75V,
10mA≤I
OUT
≤1A
* 1.5V≤ (V
IN
-V
OUT
)
≤5.75V
* V
IN
=V
OUT
+1.25V
f=120Hz, C
OUT
=22μF, Tantalum
V
IN
-V
OUT
=3V, I
OUT
=1.5A
Ta=25°C, 30ms pulse
*
T
a
=125°C, 1000hrs
T
a
=25°C, 10Hz≤f≤10kHz
Junction Temperature
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UZ1086
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
UZ1086
V
IN
=3.3V
+
10 F
V
IN
ADJ
V
OUT
R1
124
+
22 F
1.5V at 1.5A
V
OUT
=V
REF
(1+R2/R1)+I
Adj
*R2
R2
24.9
V
IN
=5V
+
10 F
V
IN
UZ1086-2.85
V
OUT
+
GND
22 F
2.85V at 1.5A
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UZ1086
TYPICAL CHARACTERISTICS
LINEAR INTEGRATED CIRCUIT
Figure 1.Dropout Voltage vs.Output Current
1.5
1.4
Dropout Voltage Deviation(%)
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0
0
Figure 2. Load Regulation vs.Temperature
0.1
0.0
5
0
-0.05
-0.1
-
0.15
-0.2
-75 -50 -25 0
25 50 75 100 125150 175
I=1A
Dropout Voltage (V)
0.3
0.6
0.9
1.2
Output Current (A)
1.5
Junction Temperature(°C)
Figure 4.Output Voltage vs.Temperature
3.7
3.65
3.6
Reference Voltage(V)
3.55
3.5
3.45
3.4
3.35
3.3
3.25
V
OUT
=3.3V
V
OUT
=3.6V
V
OUT
SET WITH 1% RESISTORS
Figure 3.Reference Votage vs.Temperature
1.25
1.245
1.24
Reference Voltage(V)
1.235
1.23
1.225
1.22
1.215
1.21
1.205
1.2
-75 -50 -25 0
25 50 75 100 125150 175
UZ1086 adjustable Only
3.2
-75 -50 -25 0 25 50 75 100 125150 175
Junction Temperature(°C)
Junction Temperature(°C)
Figure 5.Minimum Load Current vs.Temperature
5
Figure 6.Adjust Pin Current vs.Temperature
100
90
Note1.UZ1086 Only
Minimum Load Current (mA)
4
Adjust Pin Current ( A)
25 50 75 100 125 150 175
80
70
60
50
40
30
20
10
0
-75 -50 -25 0
3
2
1
0
-75 -50 -25 0
25 50 75 100 125150 175
Junction Temperature(°C)
Junction Temperature(°C)
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QW-R102-008,J
