Data Sheet
3A LOW DROPOUT LINEAR REGULATOR
General Description
The AZ1085 is a series of low dropout positive voltage
regulators with a maximum dropout of 1.5V at 3A of
load current.
The series features on-chip thermal shutdown. It also
includes a bandgap reference and a current limiting cir-
cuit.
The AZ1085 is available in 1.5V, 1.8V, 2.5V, 2.85V,
3.3V, 5.0V and adjustable versions. The fixed versions
integrate the adjust resistors. The adjustable version
can set the output voltage with two external resistors.
The AZ1085 series is available in standard packages of
TO-263-2, TO-263-3, TO-220-3 and TO-252-2 (1).
AZ1085
Features
·
·
·
·
·
·
·
Low Dropout Voltage: Typical 1.3V at 3A
Current Limiting and Thermal Protection
Output Current: 3A
Current Limit: 4.5A
Operating Junction Temperature: 0 to 125
o
C
Line Regulation: 0.015% (Typical)
Load Regulation: 0.1% (Typical)
Applications
·
·
·
·
·
·
·
·
High Efficiency Linear Regulators
Battery Charger
Post Regulation for Switching Supplies
Microprocessor Supply
Mother Board Power Supplies
DVD-Video Player
Telecom Equipment
Set Top boxes and Web Boxes Modules' Supply
TO-263-3
TO-263-2
TO-252-2 (1)
TO-220-3
Figure 1. Package Types of AZ1085
Mar. 2007 Rev. 1. 3
1
BCD Semiconductor Manufacturing Limited
Data Sheet
3A LOW DROPOUT LINEAR REGULATOR
Pin Configuration
T Package
(TO-220-3)
D Package
(TO-252-2 (1))
3
INPUT
OUTPUT
ADJ/GND
2
1
OUTPUT
ADJ/GND
INPUT
AZ1085
3
2
1
S Package
(TO-263-3)
S2 Package
(TO-263-2)
3
2
1
INPUT
OUTPUT
ADJ/GND
3
2
1
INPUT
OUTPUT (TAB)
ADJ/GND
Figure 2. Pin Configuration of AZ1085 (Top View)
Functional Block Diagram
INPUT
Thermal
Protection
-
+
OUTPUT
A1
A2
For Adjustable Output, disconnect A1 and A2, connect B
For Fixed Output, connect A1 and A2, disconnect B
ADJ/
GND
B
Figure 3. Functional Block Diagram of AZ1085
Mar. 2007 Rev. 1. 3
2
BCD Semiconductor Manufacturing Limited
Data Sheet
3A LOW DROPOUT LINEAR REGULATOR
Ordering Information
AZ1085
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel
Blank: Tube
Package
D: TO-252-2 (1)
T: TO-220-3
S: TO-263-3
S2: TO-263-2
ADJ: Adjustable Output
1.5: Fixed Output 1.5V
1.8: Fixed Output 1.8V
2.5: Fixed Output 2.5V
2.85: Fixed Output 2.85V
3.3: Fixed Output 3.3V
5.0: Fixed Output 5.0V
AZ1085
Circuit Type
Package
Tempera-
ture Range
Part Number
Tin Lead
AZ1085D-ADJ
AZ1085D-ADJTR
AZ1085D-1.5
AZ1085D-1.5TR
AZ1085D-1.8
AZ1085D-1.8TR
Lead Free
AZ1085D-ADJE1
AZ1085D-ADJTRE1
AZ1085D-1.5E1
AZ1085D-1.5TRE1
AZ1085D-1.8E1
AZ1085D-1.8TRE1
AZ1085D-2.5E1
AZ1085D-2.5TRE1
AZ1085D-2.85E1
AZ1085D-2.85TRE1
AZ1085D-3.3E1
AZ1085D-3.3TRE1
AZ1085D-5.0E1
AZ1085D-5.0TRE1
AZ1085T-ADJE1
AZ1085T-1.5E1
AZ1085T-1.8E1
AZ1085T-2.5E1
AZ1085T-2.85E1
AZ1085T-3.3E1
AZ1085T-5.0E1
Tin Lead
Marking ID
Lead Free
AZ1085D-ADJE1
AZ1085D-ADJE1
AZ1085D-1.5E1
AZ1085D-1.5E1
AZ1085D-1.8E1
AZ1085D-1.8E1
AZ1085D-2.5E1
AZ1085D-2.5E1
AZ1085D-2.85E1
AZ1085D-2.85E1
AZ1085D-3.3E1
AZ1085D-3.3E1
AZ1085D-5.0E1
AZ1085D-5.0E1
AZ1085T-ADJE1
AZ1085T-1.5E1
AZ1085T-1.8E1
AZ1085T-2.5E1
AZ1085T-2.85E1
AZ1085T-3.3E1
AZ1085T-5.0E1
Packing
Type
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tube
Tube
Tube
Tube
Tube
Tube
AZ1085D-ADJ
AZ1085D-ADJ
AZ1085D-1.5
AZ1085D-1.5
AZ1085D-1.8
AZ1085D-1.8
AZ1085D-2.5
AZ1085D-2.5
AZ1085D-2.85
AZ1085D-2.85
AZ1085D-3.3
AZ1085D-3.3
AZ1085D-5.0
AZ1085D-5.0
AZ1085T-ADJ
AZ1085T-1.5
AZ1085T-1.8
AZ1085T-2.5
AZ1085T-2.85
AZ1085T-3.3
AZ1085T-5.0
TO-252-2 (1)
0 to 125
o
C
AZ1085D-2.5
AZ1085D-2.5TR
AZ1085D-2.85
AZ1085D-2.85TR
AZ1085D-3.3
AZ1085D-3.3TR
AZ1085D-5.0
AZ1085D-5.0TR
AZ1085T-ADJ
AZ1085T-1.5
AZ1085T-1.8
TO-220-3
0 to 125
o
C
AZ1085T-2.5
AZ1085T-2.85
AZ1085T-3.3
AZ1085T-5.0
Mar. 2007 Rev. 1. 3
3
BCD Semiconductor Manufacturing Limited
Data Sheet
3A LOW DROPOUT LINEAR REGULATOR
Ordering Information (Continued)
Package
Tempera-
ture Range
Part Number
Tin Lead
AZ1085S-ADJ
AZ1085S-ADJTR
AZ1085S-1.5
AZ1085S-1.5TR
AZ1085S-1.8
AZ1085S-1.8TR
TO-263-3
0 to 125
o
C
AZ1085S-2.5
AZ1085S-2.5TR
AZ1085S-2.85
AZ1085S-2.85TR
AZ1085S-3.3
AZ1085S-3.3TR
AZ1085S-5.0
AZ1085S-5.0TR
AZ1085S2-ADJ
AZ1085S2-ADJTR
AZ1085S2-1.5
AZ1085S2-1.5TR
AZ1085S2-1.8
AZ1085S2-1.8TR
TO-263-2
0 to 125
o
C
AZ1085S2-2.5
AZ1085S2-2.5TR
AZ1085S2-2.85
AZ1085S2-2.85TR
AZ1085S2-3.3
AZ1085S2-3.3TR
AZ1085S2-5.0
AZ1085S2-5.0TR
Lead Free
AZ1085S-ADJE1
AZ1085S-ADJTRE1
AZ1085S-1.5E1
AZ1085S-1.5TRE1
AZ1085S-1.8E1
AZ1085S-1.8TRE1
AZ1085S-2.5E1
AZ1085S-2.5TRE1
AZ1085S-2.85E1
AZ1085S-2.85TRE1
AZ1085S-3.3E1
AZ1085S-3.3TRE1
AZ1085S-5.0E1
AZ1085S-5.0TRE1
AZ1085S2-ADJE1
AZ1085S2-ADJTRE1
AZ1085S2-1.5E1
AZ1085S2-1.5TRE1
AZ1085S2-1.8E1
AZ1085S2-1.8TRE1
AZ1085S2-2.5E1
AZ1085S2-2.5TRE1
AZ1085S2-2.85E1
AZ1085S2-2.85TRE1
AZ1085S2-3.3E1
AZ1085S2-3.3TRE1
AZ1085S2-5.0E1
AZ1085S2-5.0TRE1
Tin Lead
AZ1085S-ADJ
AZ1085S-ADJ
AZ1085S-1.5
AZ1085S-1.5
AZ1085S-1.8
AZ1085S-1.8
AZ1085S-2.5
AZ1085S-2.5
AZ1085S-2.85
AZ1085S-2.85
AZ1085S-3.3
AZ1085S-3.3
AZ1085S-5.0
AZ1085S-5.0
AZ1085S2-ADJ
AZ1085S2-ADJ
AZ1085S2-1.5
AZ1085S2-1.5
AZ1085S2-1.8
AZ1085S2-1.8
AZ1085S2-2.5
AZ1085S2-2.5
AZ1085S2-2.85
AZ1085S2-2.85
AZ1085S2-3.3
AZ1085S2-3.3
AZ1085S2-5.0
AZ1085S2-5.0
Marking ID
Lead Free
AZ1085S-ADJE1
AZ1085S-ADJE1
AZ1085S-1.5E1
AZ1085S-1.5E1
AZ1085S-1.8E1
AZ1085S-1.8E1
AZ1085S-2.5E1
AZ1085S-2.5E1
AZ1085S-2.85E1
AZ1085S-2.85E1
AZ1085S-3.3E1
AZ1085S-3.3E1
AZ1085S-5.0E1
AZ1085S-5.0E1
AZ1085S2-ADJE1
AZ1085S2-ADJE1
AZ1085S2-1.5E1
AZ1085S2-1.5E1
AZ1085S2-1.8E1
AZ1085S2-1.8E1
AZ1085S2-2.5E1
AZ1085S2-2.5E1
AZ1085S2-2.85E1
AZ1085S2-2.85E1
AZ1085S2-3.3E1
AZ1085S2-3.3E1
AZ1085S2-5.0E1
AZ1085S2-5.0E1
Packing
Type
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
AZ1085
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 3
4
BCD Semiconductor Manufacturing Limited
Data Sheet
3A LOW DROPOUT LINEAR REGULATOR
Absolute Maximum Ratings (Note 1)
Parameter
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Symbol
T
J
T
STG
T
LEAD
TO-220-3
Thermal Resistance (Note 2)
θ
JA
AZ1085
Value
150
-65 to 150
260
60
100
60
60
2000
Unit
o
C
o
o
C
C
TO-252-2 (1)
TO-263-3
TO-263-2
o
C/W
ESD (Human Body Model)
ESD
V
Note 1: 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 Max-
imum Ratings" for extended periods may affect device reliability.
Note 2: 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 tem-
perature 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.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature Range
Symbol
V
IN
T
J
0
Min
Max
12
125
Unit
V
o
C
Mar. 2007 Rev. 1. 3
5
BCD Semiconductor Manufacturing Limited
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