A Product Line of
Diodes Incorporated
AZ1084
5A LOW DROPOUT LINEAR REGULATOR
Description
The AZ1084 is a series of low dropout positive voltage regulators with
a maximum dropout of 1.5V at 5A of load current.
The series features on-chip thermal limiting which provides protection
against any combination of overload and ambient temperatures that
would create excessive junction temperatures. It also includes a
trimmed band-gap reference and a current limiting circuit.
The AZ1084 is available in 1.5V, 1.8V, 2.5V, 3.3V and 5.0V versions.
The fixed versions integrate the adjust resistors. It is also available in
an adjustable version which can set the output voltage with two
external resistors.
The AZ1084 series is available in standard packages of TO263, TO-
263-2, TO-220-3, TO-252-2 (3), TO-252-2 (4) and TO-252-2 (5).
Features
Low Dropout Voltage: 1.3V Typical at 5A
Current Limiting and Thermal Protection
Output Current: 5A
Current Limit: 6.5A
Operating Junction Temperature Range: 0 to +125°
C
Line Regulation (Adj Version): 0.015% (Typical)
Load Regulation (Adj Version): 0.1% (Typical)
Lead-Free Packages: TO263, TO-263-2, TO-220-3, TO-252-2 (3),
TO-252-2 (4), TO-252-2 (5)
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
Lead-Free Packages, Available in “Green” Molding Compound:
TO263, TO-263-2, TO-220-3, TO-252-2 (3), TO-252-2 (4), TO-
252-2 (5)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
High Efficiency Linear Regulators
Battery Chargers
Post Regulation for Switching Supply
Microprocessor Supply
Desktop PCs, RISC and Embedded Processors' Supply
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Notes:
Pin Assignments
S Package
(TO263)
S2 Package
(TO-263-2)
D Package
(TO-252-2 (3) (Option 1))
3
2
1
INPUT
OUTPUT
ADJ/GND
3
2
1
INPUT
OUTPUT(TAB)
ADJ/GND
3
2
1
INPUT
OUTPUT
ADJ/GND
D Packages
(TO-252-2 (3) (Option 2))
(TO-252-2 (4))
(TO-252-2 (5))
3
2
1
INPUT
3
2
1
INPUT
OUTPUT
ADJ/GND
3
2
1
INPUT
OUTPUT
ADJ/GND
OUTPUT
ADJ/GND
AZ1084
Document number: DS36598 Rev. 3 - 2
1 of 22
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October 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AZ1084
Pin Assignments
(Cont.)
T Package
(TO-220-3 (Option 1))
3
2
1
T Package
(TO-220-3 (Option 2))
INPUT
OUTPUT
ADJ/GND
3
2
1
INPUT
OUTPUT
ADJ/GND
T Package
(TO-220-3 (Option 3))
3
2
1
INPUT
OUTPUT
ADJ/GND
Typical Applications Circuit
V
IN
3
+
10F
AZ1084-ADJ
2
INPUT
OUTPUT
ADJ
1
R1
150
V
OUT
+
22F
V
OUT
=V
REF
* (1+R2/R1) + I
ADJ
* R2
R2
150
V
IN
AZ1084-5.0
3
+
10F
INPUT
OUTPUT
GND
1
2
V
OUT
+
22F
AZ1084
Document number: DS36598 Rev. 3 - 2
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October 2013
© Diodes Incorporated
A Product Line of
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AZ1084
Functional Block Diagram
Absolute Maximum Ratings
(Note 4)
Symbol
T
J
T
STG
T
LEAD
Parameter
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
Rating
+150
-65 to +150
+260
TO-263-2
TO263
θ
JA
Thermal Resistance (Note 5)
TO-220-3
TO-252-2 (3)/TO-
252-2 (4)/TO-252-2
(5)
ESD
ESD
Notes
Unit
°
C
°
C
°
C
60
60
60
100
V
V
°
C/W
ESD (Human Body Model)
ESD (Machine Model)
2000
400
4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
5. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, T
J(max)
, the junction-
to-ambient thermal resistance, θ
JA
, and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated
using: P
D(max)
=(T
J(max)
-T
A
)/θ
JA
. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
thermal shutdown.
AZ1084
Document number: DS36598 Rev. 3 - 2
3 of 22
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October 2013
© Diodes Incorporated
A Product Line of
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AZ1084
Recommended Operating Conditions
Symbol
V
IN
T
J
Input Voltage
Operating Junction Temperature Range
Parameter
Min
–
0
Max
12
+125
Unit
V
º
C
Electrical Characteristics
Symbol
V
REF
Parameter
Reference Voltage
(Typicals and limits appearing in normal type apply for T
J
= +25° Limits appearing in
Boldface
type
C.
apply over the entire operating junction temperature range.)
Conditions
AZ1084-ADJ,
I
OUT
= 10mA, V
IN
-V
OUT
= 3V,
10mA ≤ I
OUT
≤ 5A, 1.5V ≤ V
IN
-V
OUT
≤ 5V
AZ1084-1.5,
I
OUT
= 0mA, V
IN
= 4.5V,
10mA ≤ I
OUT
≤ 5A, 3.0V ≤ V
IN
≤ 6V
AZ1084-1.8,
I
OUT
= 0mA, V
IN
= 4.8V,
10mA ≤ I
OUT
≤ 5A, 3.3V ≤ V
IN
≤ 6V
V
OUT
Output Voltage
AZ1084-2.5,
I
OUT
= 0mA, V
IN
= 5.5V
10mA ≤ I
OUT
≤ 5A, 4.0V ≤ V
IN
≤ 7V
AZ1084-3.3,
I
OUT
= 0mA, V
IN
= 6.3V,
10mA ≤ I
OUT
≤ 5A, 4.8V ≤ V
IN
≤ 8V
AZ1084-5.0,
I
OUT
= 0mA, V
IN
= 8V,
10mA ≤ I
OUT
≤ 5A, 6.5V ≤ V
IN
≤ 10V
AZ1084-ADJ,
I
OUT
= 10mA, 2.85V ≤ V
IN
≤ 10V
AZ1084-1.5,
I
OUT
= 10mA, 3.0V ≤ V
IN
≤ 10V
AZ1084-1.8,
I
OUT
= 10mA, 3.3V ≤ V
IN
≤ 10V
AZ1084-2.5,
I
OUT
= 10mA, 4.0V ≤ V
IN
≤ 10V
AZ1084-3.3,
I
OUT
= 10mA, 4.8V ≤ V
IN
≤ 10V
AZ1084-5.0,
I
OUT
= 10mA, 6.5V ≤ V
IN
≤ 10V
AZ1084-ADJ, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
AZ1084-1.5, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
AZ1084-1.8, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
AZ1084-2.5, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
AZ1084-3.3, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
AZ1084-5.0, 0mA ≤ I
OUT
≤ 5A,
V
IN
-V
OUT
= 3V
Min
1.238
1.225
1.485
1.47
1.782
1.764
2.475
2.45
3.267
3.234
4.95
4.9
–
–
–
–
–
–
–
–
–
–
–
–
Typ
1.250
1.250
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5
5
0.015
0.035
0.5
1
0.5
1
0.5
1
0.5
1
0.5
1
0.1
0.2
3
7
3
7
3
7
3
7
5
10
Max
1.262
1.270
1.515
1.53
1.818
1.836
2.525
2.55
3.333
3.366
5.05
5.1
0.2
0.2
6
6
6
6
6
6
6
6
10
10
0.3
0.4
15
20
15
20
15
20
15
20
20
35
Unit
V
V
V
V
V
V
%
mV
mV
mV
mV
mV
%
mV
mV
mV
mV
mV
October 2013
∆V
OUT
Line Regulation
∆V
OUT
Load Regulation
AZ1084
Document number: DS36598 Rev. 3 - 2
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A Product Line of
Diodes Incorporated
AZ1084
Electrical Characteristics
(Cont. Typicals and limits appearing in normal type apply for T
J
= +25
o
C. Limits appearing in
Boldface
type apply over the entire operating junction temperature range.)
Symbol
V
DROP
Parameter
Dropout Voltage
Conditions
I
OUT
= 5A, ∆V
REF
, ∆V
OUT
= 1%
TO-220-3
Min
–
–
–
–
–
5.5
–
–
60
–
–
–
–
–
Typ
1.3
4.15
7.36
4.15
4.15
6.5
3
5
72
55
0.2
0.5
0.5
0.003
Max
1.5
–
–
–
–
–
10
10
–
120
5
–
–
–
Unit
V
θ
JC
TO-252-2 (3)/TO-252-2 (4)/TO-252-2 (5)
Thermal Resistance
TO263
TO-263-2
°
C/W
I
LIMIT
I
LOAD
(MIN)
I
Q
PSRR
I
ADJ
∆I
ADJ
–
–
–
Current Limit
Minimum Load Current
Quiescent Current
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Noise (% of V
OUT
)
V
IN
-V
OUT
= 3V
V
IN
= 10V (AZ1084-ADJ)
V
IN
= 10V (AZ1084)
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 5A, V
IN
-V
OUT
= 3V
V
IN
= 4.25V, I
OUT
= 10mA
10mA ≤ I
OUT
≤ 5A,
1.5V ≤ (V
IN
-V
OUT
) ≤ 4.5V
I
OUT
= 10mA, V
IN
-V
OUT
= 1.5
T
A
= 125° 1000Hrs
C,
10Hz ≤ f ≤ 10kHz
A
mA
mA
dB
µA
µA
%
%
%
AZ1084
Document number: DS36598 Rev. 3 - 2
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October 2013
© Diodes Incorporated
