UNISONIC TECHNOLOGIES CO., LTD
UZ1084
5A ADJUSTABLE/FIXED LOW
DROPOUT LINEAR REGULATOR
DESCRIPTION
1
LINEAR INTEGRATED CIRCUIT
1
TO-220
The UTC
UZ1084-ADJ/Fixed
voltages are low dropout
three-terminal regulators with 5A 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.
On-chip thermal limiting provides protection against any
combination of overload and ambient temperature that would create
excessive junction temperatures.
TO-220F
1
TO-252
FEATURES
1
*Fast transient response
*Low dropout Voltage at up to 5A
*Load regulation : 0.5% typical
*On-chip thermal limiting
TO-263-3
APPLICATIONS
1
*Desktop PCs, RISC and embedded processors’ supply
*GTI, SSTL logic reference bus supply
*Low voltage V
CC
logic supply
*Battery-powered circuitry
*Post regulator for switching supply
*Cable and ADSL modems’ DSP core supply
*Set Top Boxes and Web Boxes modules’ supply
TO-263
ORDERING INFORMATION
Ordering Number
Package
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
Tube
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Lead Free
Halogen Free
UZ1084L-xx-TA3-T
UZ1084G-xx-TA3-T
TO-220
UZ1084L-xx-TF3-T
UZ1084G-xx-TF3-T
TO-220F
UZ1084L-xx-TN3-R
UZ1084G-xx-TN3-R
TO-252
UZ1084L-xx-TQ2-T
UZ1084G-xx-TQ2-T
TO-263
UZ1084L-xx-TQ2-R
UZ1084G-xx-TQ2-R
TO-263
UZ1084L-xx-TQ3-T
UZ1084G-xx-TQ3-T
TO-263-3
UZ1084L-xx-TQ3-R
UZ1084G-xx-TQ3-R
TO-263-3
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
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QW-R102-010.L
UZ1084
MARKING INFORMATION
PACKAGE
TO-220
TO-220F
TO-252
TO-263
TO-263-3
VOLTAGE CODE
15 :1.5V
18 :1.8V
25 :2.5V
33 :3.3V
50 :5.0V
AD:ADJ
LINEAR INTEGRATED CIRCUIT
MARKING
UTC
UZ1084
XX
1
2
3
LOT Code
Voltage Code
L: Lead Free
G: Halogen Free
Date Code
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2 of 6
QW-R102-010.L
UZ1084
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°С, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
DC Input Voltage
V
IN
15
V
Operating Temperature
T
OPR
0 ~ +125
°С
Storage Temperature
T
STG
-65 ~ 150
°С
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
SYMBOL
θ
JA
RATINGS
112
54
64
12
4
4
UNIT
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
PARAMETER
TO-252
Junction to Ambient
TO-220
TO-263/TO-263-3
TO-252
Junction to Case
TO-220
TO-263/TO-263-3
θ
JC
ELECTRICAL CHARACTERISTICS
For UZ1084-Adjustable
(Operating Conditions: 4.75≤V
IN
≤5.25,
T
J
=25°С unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Reference Voltage
V
REF
I
OUT
=10mA
1.23 1.25 1.27
V
Line Regulation
V
OUT
l
OUT
=10mA
0.5
2
%
Load Regulation
V
OUT
10mA≤l
OUT
≤
5A
0.5
2.5
%
Dropout Voltage
V
D
△
V
REF
%=2%, lo=5A
1.5
V
Current Limit
I
LIMIT
(V
IN
-V
OUT
)=2V
5.5
6.5
A
Adjust Pin Current
I
ADJ
35
100
μA
Adjust Pin Current Change
∆I
ADJ
1.5V≤(V
IN
-V
OUT
)≤ 5.75V, 10mA≤l
OUT
≤5A
5
μA
Minimum Load Current
I
O(MIN)
1.5V≤(V
IN
-V
OUT
)≤5.75V
5
10
mA
Thermal shutdown
150
°C
For UZ1084-xx (Fixed Voltage)
(Operating Conditions: 1.5V≤ (V
IN
-V
OUT
)
≤5.75V,
T
J
=25°С unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
1%
UZ1084-15 l
OUT
=10mA
2%
1%
UZ1084-18 l
OUT
=10mA
2%
1%
Output Voltage
V
OUT
UZ1084-25 l
OUT
=10mA
2%
1%
UZ1084-33 l
OUT
=10mA
2%
1%
UZ1084-50 l
OUT
=10mA
2%
Line Regulation
V
OUT
I
OUT
=10mA
Load Regulation
V
OUT
10mA≤l
OUT
≤5A
Dropout Voltage
V
D
△
V
REF
%=2%, l
OUT
=5A
Current Limit
I
LIMIT
(V
IN
-V
OUT
)=2V
Minimum Load Current
∆I
ADJ
1.5V≤ (V
IN
-V
OUT
)
≤5.75V
Quiescent Current
I
Q
V
IN
=12V
Thermal shutdown
MIN. TYP MAX UNIT
1.485 1.5 1.515
V
1.470 1.5 1.530
V
1.782 1.8 1.818
V
1.764 1.8 1.836
V
2.475 2.5 2.525
V
2.450 2.5 2.550
V
3.267 3.3 3.333
V
3.234 3.3 3.366
V
4.950 5.0 5.050
V
4.900 5.0 5.100
V
0.5
2
%
0.5
2.5
%
1.5
V
5.5
6.5
A
5
10
mA
10
13
mA
150
C
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QW-R102-010.L
UZ1084
TYPICAL APPLICATION CIRCUITS
Adjustable Voltage Regulator
UZ1084-ADJ
V
OUT
V
IN
+
ADJ
LINEAR INTEGRATED CIRCUIT
V
IN
=12V
22μF
V
OUT
=2.5V
R1
124Ω
R2
124Ω
+
22μF
V
OUT
=V
REF
(1+R2/R1)+I
ADJ*
R2
Fixed Voltage Regulator
UZ1084-1.5
V
IN
=3.3V
+ 10µF
V
IN
V
OUT
GND
V
OUT
=1.5 V
at 5A
22µF
+
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QW-R102-010.L
UZ1084
TYPICAL CHARACTERISTICS
Dropout Voltage vs. Output Current
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
LINEAR INTEGRATED CIRCUIT
Minimum Load Current v.s. Temperature
5
Minimum Load Current (mA)
Dropout Voltage, V
D
(V)
T=-25°С
T=25°С
4
3
T=125°С
2
1
0
1
2
3
4
Output Current, I
OUT
(A)
5
-40 -20
0
20 40 60 80 100 120
Temperature (°С)
Short-Circuit Current v.s. Temperature
8
Short-Circuit Current (A)
70
60
50
40
30
20
10
-40 -20
0
20 40 60 80 100 120
Temperature (°С)
Adjust Pin Current v.s. Temperature
7
6
5
4
Adjust Pin Current (µA)
-40 -20
0
20 40 60 80 100 120
Temperature (°С)
3.40
3.38
Output Voltage, V
OUT
(V)
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
Output Voltage v.s. Temperature
V
OUT
=3.3V
Quiescent Current, IQ (mA)
8
7
6
5
4
3
Quiescent Current v.s. Temperature
3.20
-40 -20
0
20 40 60 80 100 120
Temperature (°С)
2
-40 -20
0
20 40 60 80 100 120
Temperature (°С)
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QW-R102-010.L
Embedded System
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