Advanced AMS1083
Monolithic 8A LOW DROPOUT VOLTAGE REGULATOR
Systems
RoHS compliant
FEATURES APPLICATIONS
• Three Terminal Adjustable or Fixed • High Efficiency Linear Regulators
1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V
• Output Current of 8A • Microprocessor Supply
• Operates Dow
• Line Regulation: 0.015% • Constant Current Regulators
• Load Regulation: 0.1% • Notebook/Personal Computer Supplies
• TO-220 and TO-263 packages available • Portable Instrumentation
n to 1V Dropout • Battery Chargers
GENERAL DESCRIPTION
The AMS1083 series of adjustable and fixed voltage regulators are designed to provide 8A output current and to operate
down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.5V at maximum output
current, decreasing at lower load currents.
On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload
conditions on both the regulator and power source circuitry.
The AMS1083 devices are pin compatible with older three-terminal regulators and are offered in 3 lead TO-220 package and 3
lead TO-263 (Plastic DD).
ORDERING INFORMATION:
3 LEAD TO-220 3 LEAD TO-263
AMS1083CT AMS1083CM
AMS1083CT-1.5 AMS1083CM-1.5
AMS1083CT-2.5 AMS1083CM-2.5
AMS1083CT-2.85 AMS1083CM-2.85
AMS1083CT-3.0 AMS1083CM-3.0
AMS1083CT-3.3 AMS1083CM-3.3
AMS1083CT-3.5 AMS1083CM-3.5
AMS1083CT-5.0 AMS1083CM-5.0
PIN CONNECTIONS
FIXED VERSION
1- Ground
2- V
OUT
3- V
IN
PACKAGE TYPE OPERATING JUNCTION
TEMPERATURE RANGE
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
0 to 125° C
ADJUSTABLE VERSION
1- Adjust
2- V
3- V
OUT
IN
• Post Regulators for Switching Supplies
FRONT VIEW
3
2
1
3
2
1
TAB IS
OUTPUT
TAB IS
OUTPUT
FRONT VIEW
Advanced Monolithic Systems, Inc.
AMS1083
ABSOLUTE MAXIMUM RATINGS (Note 1)
Power Dissipation Internally limited Soldering information
Input Voltage 15V Lead Temperature (25 sec)
Operating Junction Temperature Thermal Resistance
Control Section
Power Transistor
Storage temperature
0°C to 125°C
0°C to 150°C
- 65°C to +150°C
TO-220 package
TO-263 package
* With package soldering to 0.5in2 copper area over backside
ground plane or internal power plane ϕ
20°C/W to >40°C/W depending on mounting technique.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
= 0 mA, and TJ = +25°C unless otherwise specified.
OUT
265°C
= 50°C/W
ϕ
JA
ϕ
30°C/W *
JA=
can vary from
JA
Parameter
Device Conditions Min Typ Max Units
Reference Voltage
(Note 2)
Output Voltage
(Note 2)
AMS1083-2.5
Line Regulation AMS1083/-1.5/-2.5/-
Load Regulation
(Notes 2, 3)
AMS1083-1.5
AMS1083-2.85
AMS1083-3.0
AMS1083-3.3
AMS1083-3.5
AMS1083-5.0
AMS1083 I
AMS1083-1.5
AMS1083-2.85
AMS1083-3.0
AMS1083-3.3
AMS1083-3.5
AMS1083-5.0
2.85/ -3.0/-3.3/-3.5/-5.0
AMS1083
AMS1083-2.5
= 10 mA
OUT
10mA ≤ I
≤ 8A , 3V≤ VIN ≤ 12V
0 ≤ I
OUT
≤ 8A , 4V≤ VIN ≤ 12V
0 ≤ I
OUT
0 ≤ I
≤ 8A , 4.35V≤ VIN ≤ 12V
OUT
≤ 8A , 4.5V ≤ VIN ≤ 12V
0 ≤ I
OUT
≤ 8A , 4.75V ≤ VIN ≤ 12V
0 ≤ I
OUT
≤ 8A, 5V ≤ VIN ≤ 12V
0 ≤ I
OUT
≤ 8A , 6.5V ≤ VIN ≤ 12V
0 ≤ I
OUT
= 10 mA , 1.5V≤ (VIN - V
I
LOAD
- V
(V
IN
OUT
= 5V, 0 ≤ I
V
IN
= 5V, 0 ≤ I
V
IN
= 5V, 0 ≤ I
V
IN
= 5V, 0 ≤ I
V
IN
= 5V, 0 ≤ I
V
IN
= 5.25V, 0 ≤ I
V
IN
= 8V, 0 ≤ I
V
IN
≤ 8A, 1.5V≤ (VIN - V
OUT
) =3V, 10mA ≤ I
≤ 8A
OUT
≤ 8A
OUT
≤ 8A
OUT
≤ 8A
OUT
≤ 8A
OUT
≤ 8A
OUT
≤ 8A
OUT
OUT
OUT
) ≤ 12V
OUT
≤ 8A
) ≤ 12V
1.238
1.225
1.485
1.470
2.475
2.450
2.820
2.790
2.970
2.940
3.267
3.235
3.465
3.430
4.950
4.900
1.250
1.250
1.500
1.500
2.500
2.500
2.850
2.850
3.000
3.000
3.300
3.300
3.500
3.500
5.000
5.000
0.3
0.6
0.1
0.2
3 6 12
3 6 12
3 6 12
3 6 12
3 7 15
3 6 15
5
10
1.262
1.270
1.515
1.530
2.525
2.550
2.880
2.910
3.030
3.360
3.333
3.365
3.535
3.570
5.050
5.100
6
10
0.3
0.4
20
20
20
20
25
25
20
35
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV
mV
%
%
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
Dropout Voltage
(V
- V
OUT
)
IN
AMS1083/-1.5/-2.5/-
2.85/ -3.0/-3.3/-3.5/-5.0
Advanced Monolithic Systems, Inc.
∆V
OUT
, ∆V
= 1%, I
REF
= 8 A (Note 4)
OUT
1.3 1.5
V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
= 0 mA, and TJ = +25°C unless otherwise specified.
OUT
AMS1083
Parameter
Device Conditions Min Typ Max Units
Current Limit
Minimum Load
Current
Quiescent Current AMS1083/-1.5/-2.5/-
Ripple Rejection AMS1083
AMS1083-1.5
AMS1083-2.5
AMS1083-2.85
AMS1083-3.0
AMS1083-3.3
AMS1083-3.5
AMS1083-5.0
Thermal Regulation AMS1083 TA = 25°C, 30ms pulse 0.008 0.04 %W
AMS1083/-1.5/-2.5/-
2.85/ -3.0/-3.3/-3.5/-5.0
(VIN - V
AMS1083 (VIN - V
≤ 12V
V
2.85/ -3.0/-3.3/-3.5/-5.0
IN
f =120Hz , C
(V
IN-VOUT
f =120Hz , C
V
= 4.5V
IN
f =120Hz , C
= 5.5V
V
IN
f =120Hz , C
V
= 6V
IN
f =120Hz , C
V
= 6V
IN
f =120Hz , C
V
= 6.3V
IN
f =120Hz , C
= 6.5V
V
IN
f =120Hz , C
= 8V
V
IN
) = 5V
OUT
) = 12V (Note 5)
OUT
= 25µF Tantalum, I
OUT
) = 3V, C
ADJ
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
= 25µF Tantalum, I
OUT
=25µF
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 8A,
= 8A,
= 8A,
= 8A,
= 8A
= 8A
= 8A
= 8A
8.00 9.00 10.00
5 10
60 75
60
60
60
60 72
60 72
60 72
60 68
5
72
72
72
dB
10
A
mA
mA
dB
dB
dB
dB
dB
dB
dB
Adjust Pin Current AMS1083
Adjust Pin Current
AMS1083
Change
Temperature Stability
10mA ≤ I
10mA ≤ I
≤ 8A , 1.5V≤ (VIN - V
OUT
≤ 8A , 1.5V≤ (VIN - V
OUT
OUT
OUT
) ≤ 12V
) ≤ 12V
55
0.2
0.5
120
5
µA
µA
µA
%
Long Term Stability TA =125°C, 1000Hrs 0.3 1 %
RMS Output Noise
OUT
)
(% of V
Thermal Resistance
Junction-to-Case
= 25°C , 10Hz ≤ f ≤ 10kHz
T
A
M Package: Control Circuitry/ Power Transistor
T Package: Control Circuitry/ Power Transistor
0.003 %
1.5/4.0
1.5/4.0
°C/W
°C/W
Parameters identified with boldface type apply over the full operating temperature range.
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the
Electrical Characteristics
. The guaranteed specifications apply only for the test conditions listed.
Note 2: Line and Load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output
differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
Note 3:See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction
temperature by low duty cycle pulse testing. Load regulation is measured at the output lead ~1/8” from the package.
Note 4: Dropout voltage is specified over the full output current range of the device.
Note 5: Minimum load current is defined as the minimum output current required to maintain regulation. When (V
to regulate if the output current is greater than 10mA.
- V
) = 12V the device is guaranteed
IN
OUT
Advanced Monolithic Systems, Inc.