3A LOW DROPOUT LINEAR REGULATOR AZ1085
Data Sheet
1
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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-263-2L, TO-263-3L, TO-220 and TO-252.
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
Figure 1. Package Types of AZ1085
TO-252
TO-220
TO-263-3L
TO-263-2L
3A LOW DROPOUT LINEAR REGULATOR AZ1085
Data Sheet
2
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
Figure 2. Pin Configuration of AZ1085 (Top View)
Pin Configuration
Functional Block Diagram
Figure 3. Functional Block Diagram of AZ1085
T Package
(TO-220)
S Package
(TO-263-3L)
INPUT
OUTPUT
ADJ/GND
1
2
3
1
2
3
ADJ/GND
OUTPUT
D Package
(TO-252)
1
2
3
ADJ/GND
OUTPUT
INPUT
INPUT
S Package
(TO-263-2L)
ADJ/GND
INPUT
1
2
3
OUTPUT (TAB)
Thermal
Protection
+
-
For Adjustable Output, disconnect A1 and A2, connect B
INPUT
OUTPUT
ADJ/
GND
A1
A2
B
For Fixed Output, connect A1 and A2, disconnect B
3A LOW DROPOUT LINEAR REGULATOR AZ1085
Data Sheet
3
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
Circuit Type
Package
D: TO-252
ADJ: Adjustable Output
1.5: Fixed Output 1.5V
1.8: Fixed Output 1.8V
2.5: Fixed Output 2.5V
3.3: Fixed Output 3.3V
5.0: Fixed Output 5.0V
E1: Lead Free
Blank: Tin Lead
AZ1085 -
TR: Tape and Reel
Blank: Tube
T: TO-220
S: TO-263-3L
S2: TO-263-2L
2.85: Fixed Output 2.85V
Package
Tempera-
ture Range
Part Number
Marking ID
Packing
Type
Tin Lead
Lead Free
Tin Lead
Lead Free
TO-252
0 to
125
o
C
AZ1085D-ADJ
AZ1085D-ADJE1
AZ1085D-ADJ
AZ1085D-ADJE1
Tube
AZ1085D-ADJTR
AZ1085D-ADJTRE1
AZ1085D-ADJ
AZ1085D-ADJE1
Tape & Reel
AZ1085D-1.5
AZ1085D-1.5E1
AZ1085D-1.5
AZ1085D-1.5E1
Tube
AZ1085D-1.5TR
AZ1085D-1.5TRE1
AZ1085D-1.5
AZ1085D-1.5E1
Tape & Reel
AZ1085D-1.8
AZ1085D-1.8E1
AZ1085D-1.8
AZ1085D-1.8E1
Tube
AZ1085D-1.8TR
AZ1085D-1.8TRE1
AZ1085D-1.8
AZ1085D-1.8E1
Tape & Reel
AZ1085D-2.5
AZ1085D-2.5E1
AZ1085D-2.5
AZ1085D-2.5E1
Tube
AZ1085D-2.5TR
AZ1085D-2.5TRE1
AZ1085D-2.5
AZ1085D-2.5E1
Tape & Reel
AZ1085D-2.85
AZ1085D-2.85E1
AZ1085D-2.85
AZ1085D-2.85E1
Tube
AZ1085D-2.85TR
AZ1085D-2.85TRE1
AZ1085D-2.85
AZ1085D-2.85E1
Tape & Reel
AZ1085D-3.3
AZ1085D-3.3E1
AZ1085D-3.3
AZ1085D-3.3E1
Tube
AZ1085D-3.3TR
AZ1085D-3.3TRE1
AZ1085D-3.3
AZ1085D-3.3E1
Tape & Reel
AZ1085D-5.0
AZ1085D-5.0E1
AZ1085D-5.0
AZ1085D-5.0E1
Tube
AZ1085D-5.0TR
AZ1085D-5.0TRE1
AZ1085D-5.0
AZ1085D-5.0E1
Tape & Reel
TO-220
0 to
125
o
C
AZ1085T-ADJ
AZ1085T-ADJE1
AZ1085T-ADJ
AZ1085T-ADJE1
Tube
AZ1085T-1.5
AZ1085T-1.5E1
AZ1085T-1.5
AZ1085T-1.5E1
Tube
AZ1085T-1.8
AZ1085T-1.8E1
AZ1085T-1.8
AZ1085T-1.8E1
Tube
AZ1085T-2.5
AZ1085T-2.5E1
AZ1085T-2.5
AZ1085T-2.5E1
Tube
AZ1085T-2.85
AZ1085T-2.85E1
AZ1085T-2.85
AZ1085T-2.85E1
Tube
AZ1085T-3.3
AZ1085T-3.3E1
AZ1085T-3.3
AZ1085T-3.3E1
Tube
AZ1085T-5.0
AZ1085T-5.0E1
AZ1085T-5.0
AZ1085T-5.0E1
Tube
Ordering Information
3A LOW DROPOUT LINEAR REGULATOR AZ1085
Data Sheet
4
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
Package
Tempera-
ture Range
Part Number
Marking ID
Packing
Type
Tin Lead
Lead Free
Tin Lead
Lead Free
TO-263-3L
0 to
125
o
C
AZ1085S-ADJ
AZ1085S-ADJE1
AZ1085S-ADJ
AZ1085S-ADJE1
Tube
AZ1085S-ADJTR
AZ1085S-ADJTRE1
AZ1085S-ADJ
AZ1085S-ADJE1
Tape & Reel
AZ1085S-1.5
AZ1085S-1.5E1
AZ1085S-1.5
AZ1085S-1.5E1
Tube
AZ1085S-1.5TR
AZ1085S-1.5TRE1
AZ1085S-1.5
AZ1085S-1.5E1
Tape & Reel
AZ1085S-1.8
AZ1085S-1.8E1
AZ1085S-1.8
AZ1085S-1.8E1
Tube
AZ1085S-1.8TR
AZ1085S-1.8TRE1
AZ1085S-1.8
AZ1085S-1.8E1
Tape & Reel
AZ1085S-2.5
AZ1085S-2.5E1
AZ1085S-2.5
AZ1085S-2.5E1
Tube
AZ1085S-2.5TR
AZ1085S-2.5TRE1
AZ1085S-2.5
AZ1085S-2.5E1
Tape & Reel
AZ1085S-2.85
AZ1085S-2.85E1
AZ1085S-2.85
AZ1085S-2.85E1
Tube
AZ1085S-2.85TR
AZ1085S-2.85TRE1
AZ1085S-2.85
AZ1085S-2.85E1
Tape & Reel
AZ1085S-3.3
AZ1085S-3.3E1
AZ1085S-3.3
AZ1085S-3.3E1
Tube
AZ1085S-3.3TR
AZ1085S-3.3TRE1
AZ1085S-3.3
AZ1085S-3.3E1
Tape & Reel
AZ1085S-5.0
AZ1085S-5.0E1
AZ1085S-5.0
AZ1085S-5.0E1
Tube
AZ1085S-5.0TR
AZ1085S-5.0TRE1
AZ1085S-5.0
AZ1085S-5.0E1
Tape & Reel
TO-263-2L
0 to
125
o
C
AZ1085S2-ADJ
AZ1085S2-ADJE1
AZ1085S2-ADJ
AZ1085S2-ADJE1
Tube
AZ1085S2-ADJTR
AZ1085S2-ADJTRE1
AZ1085S2-ADJ
AZ1085S2-ADJE1
Tape & Reel
AZ1085S2-1.5
AZ1085S2-1.5E1
AZ1085S2-1.5
AZ1085S2-1.5E1
Tube
AZ1085S2-1.5TR
AZ1085S2-1.5TRE1
AZ1085S2-1.5
AZ1085S2-1.5E1
Tape & Reel
AZ1085S2-1.8
AZ1085S2-1.8E1
AZ1085S2-1.8
AZ1085S2-1.8E1
Tube
AZ1085S2-1.8TR
AZ1085S2-1.8TRE1
AZ1085S2-1.8
AZ1085S2-1.8E1
Tape & Reel
AZ1085S2-2.5
AZ1085S2-2.5E1
AZ1085S2-2.5
AZ1085S2-2.5E1
Tube
AZ1085S2-2.5TR
AZ1085S2-2.5TRE1
AZ1085S2-2.5
AZ1085S2-2.5E1
Tape & Reel
AZ1085S2-2.85
AZ1085S2-2.85E1
AZ1085S2-2.85
AZ1085S2-2.85E1
Tube
AZ1085S2-2.85TR
AZ1085S2-2.85TRE1
AZ1085S2-2.85
AZ1085S2-2.85E1
Tape & Reel
AZ1085S2-3.3
AZ1085S2-3.3E1
AZ1085S2-3.3
AZ1085S2-3.3E1
Tube
AZ1085S2-3.3TR
AZ1085S2-3.3TRE1
AZ1085S2-3.3
AZ1085S2-3.3E1
Tape & Reel
AZ1085S2-5.0
AZ1085S2-5.0E1
AZ1085S2-5.0
AZ1085S2-5.0E1
Tube
AZ1085S2-5.0TR
AZ1085S2-5.0TRE1
AZ1085S2-5.0
AZ1085S2-5.0E1
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Ordering Information (Continued)
3A LOW DROPOUT LINEAR REGULATOR AZ1085
Data Sheet
5
Apr. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Operating Junction Temperature
T
J
150
o
C
Storage Temperature
T
S
-65
150
o
C
Lead Temperature (Soldering, 10 sec.)
T
LEAD
300
o
C
ESD (Human Body Model)
ESD
2000
V
Parameter
Symbol
Min
Max
Unit
Input Voltage
V
IN
12
V
Operating Junction Temperature Range
T
J
0
125
o
C
Absolute Maximum Ratings (Note 1)
PDF 
ZIP