5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
1
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
General 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 pro-
vides 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, 2.85V,
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
TO-263-2, TO-263-3, TO-220 and TO-252.
Features
·Low Dropout Voltage: 1.3V Typically at 5A
·Current Limiting and Thermal Protection
·Output Current: 5A
·Current Limit: 6.5A
·Operating Junction Temperature Range:0 to 125oC
·Line Regulation: 0.015% (Typical)
·Load Regulation: 0.2% (Typical)
Applications
·High Efficiency Linear Regulators
·Battery Chargers
·Post Regulation for Switching Supply
·Microprocessor Supply
·Desktop PCs, RISC and Embedded Processors'
Supply
Figure 1. Package Types of AZ1084
TO-252 TO-220TO-263-3 TO-263-2
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
2
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Figure 2. Pin Configuration of AZ1084 (Top View)
Pin Configuration
Functional Block Diagram
Figure 3. Functional Block Diagram of AZ1084
T Package
(TO-220)
S Package
(TO-263-3)
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-263-2)
ADJ/GND
INPUT
1
2
3
OUTPUT (TAB)
Thermal
Protection +
-
For Adjustable Output, disconnect A1 and A2, c onnect B
INPUT
OUTPUT
ADJ/
GND
A1 A2
B
For Fixed Ou tput, connect A1 and A2, disconnect B 1
2
3
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
3
Oct. 2005 Rev. 1. 2 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
AZ1084 -
TR: Tape and Reel
Blank: Tube
T: TO-220
S: TO-263-3
S2: TO-263-2
2.85: Fixed Output 2.85 V
Package Tempera-
ture Range Part Number Marking ID Packing
Type
Tin Lead Lead Free Tin Lead Lead Free
TO-252 0 to 125oC
AZ1084D-ADJ AZ1084D-ADJE1 AZ1084D-ADJ AZ1084D-ADJE1 Tube
AZ1084D-ADJTR AZ1084D-ADJTRE1 AZ1084D-ADJ AZ1084D-ADJE1 Tape & Reel
AZ1084D-1.5 AZ1084D-1.5E1 AZ1084D-1.5 AZ1084D-1.5E1 Tube
AZ1084D-1.5TR AZ1084D-1.5TRE1 AZ1084D-1.5 AZ1084D-1.5E1 Tape & Reel
AZ1084D-1.8 AZ1084D-1.8E1 AZ1084D-1.8 AZ1084D-1.8E1 Tube
AZ1084D-1.8TR AZ1084D-1.8TRE1 AZ1084D-1.8 AZ1084D-1.8E1 Tape & Reel
AZ1084D-2.5 AZ1084D-2.5E1 AZ1084D-2.5 AZ1084D-2.5E1 Tube
AZ1084D-2.5TR AZ1084D-2.5TRE1 AZ1084D-2.5 AZ1084D-2.5E1 Tape & Reel
AZ1084D-2.85 AZ1084D-2.85E1 AZ1084D-2.85 AZ1084D-2.85E1 Tube
AZ1084D-2.85TR AZ1084D-2.85TRE1 AZ1084D-2.85 AZ1084D-2.85E1 Tape & Reel
AZ1084D-3.3 AZ1084D-3.3E1 AZ1084D-3.3 AZ1084D-3.3E1 Tube
AZ1084D-3.3TR AZ1084D-3.3TRE1 AZ1084D-3.3 AZ1084D-3.3E1 Tape & Reel
AZ1084D-5.0 AZ1084D-5.0E1 AZ1084D-5.0 AZ1084D-5.0E1 Tube
AZ1084D-5.0TR AZ1084D-5.0TRE1 AZ1084D-5.0 AZ1084D-5.0E1 Tape & Reel
TO-220 0 to 125oC
AZ1084T-ADJ AZ1084T-ADJE1 AZ1084T-ADJ AZ1084T-ADJE1 Tube
AZ1084T-1.5 AZ1084T-1.5E1 AZ1084T-1.5 AZ1084T-1.5E1 Tube
AZ1084T-1.8 AZ1084T-1.8E1 AZ1084T-1.8 AZ1084T-1.8E1 Tube
AZ1084T-2.5 AZ1084T-2.5E1 AZ1084T-2.5 AZ1084T-2.5E1 Tube
AZ1084T-2.85 AZ1084T-2.85E1 AZ1084T-2.85 AZ1084T-2.85E1 Tube
AZ1084T-3.3 AZ1084T-3.3E1 AZ1084T-3.3 AZ1084T-3.3E1 Tube
AZ1084T-5.0 AZ1084T-5.0E1 AZ1084T-5.0 AZ1084T-5.0E1 Tube
Ordering Information
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
4
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Package Tempera-
ture Range Part Number Marking ID Packing
Type
Tin Lead LeadFree Tin Lead LeadFree
TO-263-3 0 to 125oC
AZ1084S-ADJ AZ1084S-ADJE1 AZ1084S-ADJ AZ1084S-ADJE1 Tube
AZ1084S-ADJTR AZ1084S-ADJTRE1 AZ1084S-ADJ AZ1084S-ADJE1 Tape & Reel
AZ1084S-1.5 AZ1084S-1.5E1 AZ1084S-1.5 AZ1084S-1.5E1 Tube
AZ1084S-1.5TR AZ1084S-1.5TRE1 AZ1084S-1.5 AZ 1084S-1.5E1 Tape & Reel
AZ1084S-1.8 AZ1084S-1.8E1 AZ1084S-1.8 AZ1084S-1.8E1 Tube
AZ1084S-1.8TR AZ1084S-1.8TRE1 AZ1084S-1.8 AZ 1084S-1.8E1 Tape & Reel
AZ1084S-2.5 AZ1084S-2.5E1 AZ1084S-2.5 AZ1084S-2.5E1 Tube
AZ1084S-2.5TR AZ1084S-2.5TRE1 AZ1084S-2.5 AZ 1084S-2.5E1 Tape & Reel
AZ1084S-2.85 AZ1084S-2.85E1 AZ1084S-2.85 AZ1084S-2.85E1 Tube
AZ1084S-2.85TR AZ1084S-2.85TRE1 AZ1084S-2.85 AZ1084S-2.85E1 Tape & Reel
AZ1084S-3.3 AZ1084S-3.3E1 AZ1084S-3.3 AZ1084S-3.3E1 Tube
AZ1084S-3.3TR AZ1084S-3.3TRE1 AZ1084S-3.3 AZ 1084S-3.3E1 Tape & Reel
AZ1084S-5.0 AZ1084S-5.0E1 AZ1084S-5.0 AZ1084S-5.0E1 Tube
AZ1084S-5.0TR AZ1084S-5.0TRE1 AZ1084S-5.0 AZ 1084S-5.0E1 Tape & Reel
TO-263-2 0 to 125oC
AZ1084S2-ADJ AZ1084S2-ADJE1 AZ1084S2-ADJ AZ1084S2-ADJE1 Tube
AZ1084S2-ADJTR AZ1084S2-ADJTRE1 AZ1084S2-ADJ AZ1084S2-ADJE1 Tape & Reel
AZ1084S2-1.5 AZ1084S2-1.5E1 AZ1084S2-1.5 AZ1084S2-1.5E1 Tube
AZ1084S2-1.5TR AZ1084S2-1.5TRE1 AZ1084S2-1.5 AZ1084S2-1.5E1 Tape & Reel
AZ1084S2-1.8 AZ1084S2-1.8E1 AZ1084S2-1.8 AZ1084S2-1.8E1 Tube
AZ1084S2-1.8TR AZ1084S2-1.8TRE1 AZ1084S2-1.8 AZ1084S2-1.8E1 Tape & Reel
AZ1084S2-2.5 AZ1084S2-2.5E1 AZ1084S2-2.5 AZ1084S2-2.5E1 Tube
AZ1084S2-2.5TR AZ1084S2-2.5TRE1 AZ1084S2-2.5 AZ1084S2-2.5E1 Tape & Reel
AZ1084S2-2.85 AZ1084S2-2.85E1 AZ1084S2-2.85 AZ1084S2-2.85E1 Tube
AZ1084S2-2.85TR AZ1084S2-2.85 TRE1 AZ1084S2-2.85 AZ1084S2-2.85E1 Tape & Reel
AZ1084S2-3.3 AZ1084S2-3.3E1 AZ1084S2-3.3 AZ1084S2-3.3E1 Tube
AZ1084S2-3.3TR AZ1084S2-3.3TRE1 AZ1084S2-3.3 AZ1084S2-3.3E1 Tape & Reel
AZ1084S2-5.0 AZ1084S2-5.0E1 AZ1084S2-5.0 AZ1084S2-5.0E1 Tube
AZ1084S2-5.0TR AZ1084S2-5.0TRE1 AZ1084S2-5.0 AZ1084S2-5.0E1 Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Ordering Information (Continued)
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
5
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Note 1: S tresses 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.
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Operating Junction Temperature Range TJ150 oC
Storage Temperature Range TS-65 150 oC
Lead Temperature (Soldering, 10 sec.) TLEAD 300 oC
ESD (Human Body Model) ESD 2000 V
Parameter Symbol Min Max Unit
Input Voltage VIN 12 V
Operating Junction Temperature Range TJ 0 125 oC
Absolute Maximum Ratings (Note 1)
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
6
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25
o
C. Limits appearing in
Boldface
type apply over
Parameter Symbol Conditions Min Typ Max Unit
Reference Voltage VREF
AZ1084-ADJ,
IOUT = 10mA, VIN -VOUT = 3V,
10mA ≤ IOUT ≤ 5A, 1.5V ≤ VIN - VOUT ≤ 5V
1.238
1.225
1.250
1.250
1.262
1.270
V
Output Voltage VOUT
AZ1084-1.5,
IOUT = 0mA, VIN = 4.5V,
10mA≤ IOUT ≤ 5A, 3.1V≤ VIN ≤ 6V
1.485
1.47 1.5
1.5 1.515
1.53
V
AZ1084-1.8,
IOUT = 0mA, VIN = 4.8V,
10mA≤ IOUT ≤ 5A, 3.4V≤ VIN ≤ 6V
1.782
1.764
1.8
1.8
1.818
1.836
V
AZ1084-2.5,
IOUT = 0mA, VIN = 5.5V,
10mA≤ IOUT ≤ 5A, 4.1V≤ VIN ≤ 7V
2.475
2.45
2.5
2.5
2.525
2.55
V
AZ1084-2.85,
IOUT = 0mA, VIN = 6V,
10mA≤ IOUT ≤ 5A, 4.5V≤ VIN ≤ 8V
2.822
2.793
2.85
2.85
2.879
2.907
V
AZ1084-3.3,
IOUT = 0mA, VIN = 6.3V,
10mA≤ IOUT ≤ 5A, 4.9V≤ VIN ≤ 8V
3.267
3.234
3.3
3.3
3.333
3.366
V
AZ1084-5.0,
IOUT = 0mA, VIN = 8V,
10mA≤ IOUT ≤ 5A, 6.6V≤ VIN ≤ 10V
4.95
4.9
5
5
5.05
5.1
V
Line Regulation ∆VOUT
AZ1084-ADJ,
IOUT = 10mA, 2.85V ≤ VIN ≤ 10V 0.015
0.035 0.2
0.2 %
AZ1084-1.5,
IOUT = 10mA, 3.1V ≤ VIN ≤ 10V 0.5
1 6
6 mV
AZ1084-1.8,
IOUT = 10mA, 3.4V ≤ VIN ≤ 10V 0.5
1 6
6 mV
AZ1084-2.5,
IOUT = 10mA, 4.1V ≤ VIN ≤ 10V 0.5
1 6
6 mV
AZ1084-2.85,
IOUT = 10mA, 4.5V ≤ VIN ≤ 10V 0.5
1 6
6 mV
AZ1084-3.3,
IOUT = 10mA, 4.9V ≤ VIN ≤ 10V 0.5
1 6
6 mV
AZ1084-5.0,
IOUT = 10mA, 6.6V ≤ VIN ≤ 10V 0.5
1 10
10 mV
the entire operating junction temperature range.
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
7
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Electrical Characteristics (Continued)
Parameter Symbol Conditions Min Typ Max Unit
Load Regulation ∆VOUT
AZ1084-ADJ, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 0.1
0.2 0.3
0.4 %
AZ1084-1.5, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 3
7 15
20 mV
AZ1084-1.8, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 3
7 15
20 mV
AZ1084-2.5, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 3
7 15
20 mV
AZ1084-2.85, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 3
7 15
20 mV
AZ1084-3.3, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 3
7 15
20 mV
AZ1084-5.0, 0mA≤ IOUT ≤ 5A,
VIN - VOUT = 3V 5
10 20
35 mV
Dropout Voltage IO = 5A, ∆VREF,∆VOUT= 1% 1.3 1.5 V
Current Limit ILIMIT VIN - VOUT = 3V, 5.5 6.5 A
Minimum
Load Current VIN = 10V (AZ1084-ADJ) 3 10 mA
Quiescent Current VIN = 10V (AZ1084) 5 10 mA
Ripple Rejection fRIPPLE = 120Hz, COUT = 25µF Tantalum,
IOUT = 5A, VIN - VOUT = 3V 60 72 dB
Adjust Pin Current VIN = 4.25V, IOUT = 10mA 55 120 µA
Adjust Pin Current
Change 10mA ≤ IOUT ≤ 5A,
1.5V≤ (VIN -VOUT) ≤ 4.5V 0.2 5 µA
Temperature
Stability IOUT = 10mA, VIN - VOUT = 1.5 0.5 %
Long Term Stability TA = 125oC, 1000Hrs 0.5 %
RMS Noise
(% of VOUT)10Hz ≤ f ≤ 10kHz 0.003 %
Thermal Resistance
Junction -to-Case θJC TO-263
TO-220
TO-252
3
3
4
oC/W
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.
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
8
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Typical Performance Characteristics
Figure 4. Dropout Voltage vs. Output Current Figure 5. Output Voltage vs. Temperature
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
Dropout Voltage (V)
Output Current (A)
0 25 50 75 100 125
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
Line Regulation (mV)
TJ (oC)
0255075100125
2.47
2.48
2.49
2.50
2.51
2.52
2.53
Output Voltage (V)
TJ (oC)
Figure 6. Line Regulation vs. Temperature
012345
20
25
30
35
40
45
50
55
60
65
70
75
80
Adjust Pin Current (uA)
Output Current (A)
Figure 7. Adjust Pin Current vs. Output Current
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
9
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Figure 8. Dropout Voltage vs. Temperature Figu re 9. Short Circuit Current vs. Dropout Voltage
Typical Performance Characteristics (Continued)
0 25 50 75 100 125
1.20
1.25
1.30
1.35
1.40
Dropout Voltage (V)
TJ (oC)
024681012
0
1
2
3
4
5
6
7
8
Short Circuit Current (A)
Dropout Voltage (V)
Figure 10. Load Transient Response Figure 11. Line Transie nt Response
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
10
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Figure 12. Typical Applications of AZ1084
Typical Application
AZ1084-ADJ
VIN VOUT
ADJ
VIN
10µF
Tantalum
R2
22µF
Tantalum
++
++
VIN
AZ1084-5.0
VIN VOUT
GND
10µF
Tantalum 22µF
Tantalum
VOUT
VOUT
R1
VOUT=VREF* (1+R2/R1) + IADJ * R2
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
11
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Mechanical Dimensions
TO-263-3 Unit: mm(inch)
7°
3°7°
8.640(0.340)
9.650(0.380)
0.990(0.039)
0.510(0.020)
2.540(0.100)
1.150(0.045)
9.650(0.380)
3°
14.760(0.581)
8.840(0.348)
2.640(0.104)
0.020(0.001)
8°
2°
0°
6°
0.380(0.015)
2.390(0.094)
0.360(0.014)
2.200(0.087)
70°
10.290(0.405)
4.070(0.160)
4.820(0.190)
1.390(0.055)
1.150(0.045)
1.390(0.055)
2.540(0.100)
1.270(0.050)
1.390(0.055)
2.690(0.106)
15.740(0.620)
0.250(0.010)
2.700(0.106)
0.400(0.016)
5.600(0.220)
7.420(0.292)
7.980(0.314)
2.540(0.100)
2.540(0.100)
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
12
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Mechanical Dimensions (Continued)
TO-263-2 Unit: mm(inch)
7°
3°7°
8.640(0.340)
9.650(0.380)
0.990(0.039)
0.510(0.020)
2.540(0.100)
1.150(0.045)
9.650(0.380)
3°
14.760(0.581)
8.840(0.348)
2.640(0.104)
0.020(0.001)
8°
2°
0°
6°
0.380(0.015)
2.390(0.094)
0.360(0.014)
2.200(0.087)
70°
10.290(0.405)
4.070(0.160)
4.820(0.190)
1.390(0.055)
1.150(0.045)
1.390(0.055)
2.540(0.100)
1.270(0.050)
1.390(0.055)
2.690(0.106)
15.740(0.620)
0.250(0.010)
2.700(0.106)
0.400(0.016)
5.600(0.220)
7.420(0.292)
7.980(0.314)
2.540(0.100)
2.540(0.100)
1.500(0.059)
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
13
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Mechanical Dimensions (Continued)
TO-220 Unit: mm(inch)
φ3.560(0.140)
14.230(0.560)
1.160(0.046)
0.813(0.032)
8.763(0.345)
2.540(0.100) 0.356(0.014)
2.080(0.082)
3°
7°
3.560(0.140)
7°
9.660(0.380)
0.550(0.022)
60°
0.381(0.015)
2.580(0.102)
60°
8.520(0.335)
φ1.500(0.059)
0.200(0.008)
1.850(0.073)
2.540(0.100)
0.381(0.015)
0.406(0.016)
3.380(0.133)
10.660(0.420)
4.060(0.160) 1.350(0.053)
27.880(1.098)
30.280(1.192)
9.520(0.375)
16.510(0.650)
4.820(0.190)
2.880(0.113)
1.760(0.069)
5A LOW DROPOUT LINEAR REGULATOR AZ1084
Data Sheet
14
Oct. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Mechanical Dimensions (Continued)
TO-252 Unit: mm(inch)
1°
7°
1.400(0.055)
0.020(0.001)
0.460(0.018)
2.240(0.088)
0.650(0.026)
9.500(0.374)
0.750(0.030)
0.640(0.025)
5.230(0.206) 6.380(0.251)
2.600(0.102)5.360(0.211)
2.180(0.086)
0.600(0.024)
5°5°
8°
0.400(0.016)
0.510(0.020)
0.480(0.019)
1.080(0.043)
×45°
6.680(0.263)
0.580(0.023)
2.380(0.094)
5.430(0.214)
0.950(0.037)
10.100(0.398)
2.340(0.092) 2.240(0.088)
2.340(0.092)
0.780(0.031)
0.850(0.033)
1.760(0.069)
5.560(0.219)
1.320(0.052)
0.540(0.021)
0.120(0.005)
3.000(0.118)
2.90°
3.10°2.90°
3.10°
IMPOR TANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility fo r use of any its products for any
particular purpose, nor does BCD Semiconductor Man ufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
- Wafer Fab
Shanghai SIM-BCD Semiconductor Manufacturing Limited
800, Yi Shan Road, Shanghai 200233, China
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
BCD Semiconductor Manufacturing Limited
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