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
1
TO-263
1
TO-263-3
1
TO-220
1
1
TO-252
SOT-223
*Pb-free plating product number: UZ1086L-xx
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
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
UZ1086-xx-AA3-A-T
UZ1086L-xx-AA3-A-T
UZ1086-xx-TA3-A-T
UZ1086L-xx-TA3-A-T
UZ1086-xx-TN3-A-R
UZ1086L-xx-TN3-A-R
UZ1086-xx-TN3-A-T
UZ1086L-xx-TN3-A-T
UZ1086-xx-TQ2-A-R
UZ1086L-xx-TQ2-A-R
UZ1086-xx-TQ2-A-T
UZ1086L-xx-TQ2-A-T
UZ1086-xx-TQ3-A-R
UZ1086L-xx-TQ3-A-R
UZ1086-xx-TQ3-A-T
UZ1086L-xx-TQ3-A-T
Package
SOT-223
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
A/G
O
I
Packing
Tape Reel
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)
UZ1086L-xx-TA3-A-T
(1)Packing Type
(2)Pin Assignment
(3)Package Type
(4)Output Voltage Code
(5)Lead Plating
(1) R: Tape Reel, T: Tube
(2) refer to Pin Assignment
(3) AA3: SOT-223, TA3: TO-220, TN3: TO-252,
TQ 2: TO-263, TQ3: TO-263-3
(4) xx: refer to Marking Information
(5) L: Lead Free Plating Blank: Pb/Sn
,
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Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R102-008,F
UZ1086
MARKING INFORMATION
PACKAGE
TO-220
TO-252
TO-263
TO-263-3
VOLTAGE CODE
18 :1.8V
25 :2.5V
2J :2.85V
33 :3.3V
50 :5.0V
AD :ADJ
18 :1.8V
25 :2.5V
2J :2.85V
33 :3.3V
50 :5.0V
AD :ADJ
LINEAR INTEGRATED CIRCUIT
MARKING
UTC
UZ1086
VOLTAGE CODE
LEAD PLATING
DATE CODE
1
2
3
UZ1086
LEAD PLATING
VOLTAGE CODE
DATE CODE
SOT-223
1
2
3
THERMAL DATA
PARAMETER
TO-252
Thermal Resistance Junction-Case
TO-220
TO-263
SOT-223
SYMBOL
RATINGS
12
4
4
15
UNIT
Θ
JC
°
C/W
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QW-R102-008,F
UZ1086
ABSOLUTE MAXIMUM RATINGS
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
7.5
V
℃
Junction Temperature
T
J
+125
℃
Operating Temperature
T
OPR
-20 ~ +85
℃
Storage Temperature
T
STG
-40 ~ +150
Note 1. 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.
2. The device is guaranteed to meet performance specification within 0
℃
~+70
℃
operating temperature range
and assured by design from -20
℃
~+85
℃
ELECTRICAL CHARACTERISTICS
(V
IN
≤7V,
T
J
=25
°
C, unless otherwise specified.)
PARAMETER
Reference Voltage
UZ1086-1.8
UZ1086-2.5
UZ1086-2.85
Output Voltage
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, 10mA
≤
I
OUT
≤
1A
4V
≤
V
IN
≤
7V, 10mA
≤
I
OUT
≤
1A
4.35V
≤
V
IN
≤
7V,10mA
≤
I
OUT
≤
1A
4.8V
≤
V
IN
≤
7V, 10mA
≤
I
OUT
≤
1A
6.5V
≤
V
IN
≤
7V, 10mA
≤
I
OUT
≤
1A
(V
OUT
+1.5V)≤V
IN
≤7V,
I
OUT
=10mA
V
IN
– V
OUT
=2V, 10mA≤I
OUT
≤1A
∆V
REF
=1%,I
OUT
=1.5A
V
IN
– V
OUT
=2V
MIN.
1.225
1.764
2.450
2.793
3.234
4.900
TYP. MAX. UNIT
1.25
1.80
2.50
2.85
3.30
5.00
0.005
0.05
1.30
2
35
0.2
1.275
1.836
2.550
2.907
3.366
5.100
0.2
0.5
1.40
120
5
V
V
OUT
V
∆
V
OUT
∆
V
OUT
V
D
I
LIMIT
Iadj
∆
Iadj
Io(min)
I
Q
RR
1.6
Thermal Regulation
0.004 0.02 %/W
Temperature Stability
∆
V
OUT
*
0.5
%
Ta=125
℃
, 1000hrs
Long-Term Stability
∆
V
OUT
0.03
1.0
%
Ta=25
℃
, 10Hz≤f≤10kHz
RMS Output Noise
V
OUT
0.003
%
℃
Thermal shutdown
Junction Temperature
155
℃
Thermal Shutdown Hysteresis
10
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
=22
µ
F, Tantalum
V
IN
– V
OUT
=3V, I
OUT
=1.5A
Ta=25
℃
, 30ms pulse
%
%
V
A
µ
A
µ
A
mA
mA
dB
10
4
60
72
13
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QW-R102-008,F
UZ1086
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
V
IN
=3.3V
+
10µF
V
IN
UZ1086
V
OUT
R1
124Ω
ADJ
+
22µF
1.5V at 1.5A
V
OUT
=V
REF
(1+R2/R1)+I
Adj
*R2
R2
24.9Ω
V
IN
=5V
+
10µF
V
IN
UZ1086-2.85
V
OUT
GND
+
2.85V at 1.5A
22µF
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QW-R102-008,F
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
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
SET WITH 1% RESISTORS
V
OUT
=3.6V
∆I=1A
Dropout Voltage (V)
0.3
0.6
0.9
1.2
Output Current (A)
1.5
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
4
Adjust Pin Current (µA)
Figure 6.Adjust Pin Current vs.Temperature
100
90
Note1.UZ1086 Only
80
70
60
50
40
30
20
10
0
-75 -50 -25 0 25 50 75 100 125150 175
Junction Temperature(°C)
Minimum Load Current (mA)
3
2
1
0
-75 -50 -25 0
25 50 75 100 125150 175
Junction Temperature(°C)
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QW-R102-008,F
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