Advanced Monolithic Systems AMS1083 Service Manual

http://www.BDTIC.com/AMS
Advanced AMS1083
Monolithic 8A LOW DROPOUT VOLTAGE REGULATOR
Systems
RoHS compliant
FEATURES APPLICATIONS
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
http://www.BDTIC.com/AMS
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
http://www.BDTIC.com/AMS
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.
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