AMS1084
5A
LDO VOLTAGE REGULATOR
DESCRIPTION
The
AMS1084
is a positive low voltage dropout regulator, voltage
dropout is only 1.5V at
5A.
AMS1084
has two versions: the fixed version and the adjustable
version. V
OUT
has a tolerance of less than 1% for fixed versions
1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version.
The
AMS1084
integrates overheating protection and current limit
circuits. It is an suitable for all electronic products.
TO-263-3L
TO-252-2L
TO-263-2L
TO-220-3L
FEATURES
* 1% accuracy for fixed output V
OUT
while the voltage is 1.5V,
1.8V, 2.5V, 3.3V, 5.0V and the adjustable output V
OUT
* Low Dropout Voltage: 1.5V at 5A output current
* Current Limiting: 6.5A
*Load regulation : 0.1% typical (adjustable version)
*Line regulation : 0.015% typical (adjustable version)
* Temperature Range:
0°C
to 125°C
APPLICATIONS
*
High Efficiency Linear Regulators
* SMPS Post-Regulator
* Battery Charger
*
Microprocessor Supply
*Desktop PCs, RISC and embedded processors'supply
ORDERING INFORMATION
(Temperature range: 0°C ~125°C)
AMS1084
TR: Tape & Reel
Blank: Tube
Package
CD: TO-252-2L CM: TO-263-2L
Blank: Pb free
CM: TO-263-3L
CT: TO-220-3L
: 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
1
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AMS1084
PART NO
Package
Marking
Material
Pb free
Pb free
Packing Type
Tube
AMS1084D-ADJ
AMS1084D-ADJTR
AMS1084D-1.5
AMS1084D-1.5TR
AMS1084D-1.8
AMS1084D-1.8TR
AMS1084D-2.5
AMS1084D-2.5TR
AMS1084D-3.3
AMS1084D-3.3TR
AMS1084D-5.0
AMS1084D-5.0TR
AMS1084S-ADJ
AMS1084S-ADJTR
AMS1084S-1.5
AMS1084S-1.5TR
AMS1084S-1.8
AMS1084S-1.8TR
AMS1084S-2.5
AMS1084S-2.5TR
AMS1084S-3.3
AMS1084S-3.3TR
AMS1084S-5.0
AMS1084S-5.0TR
AMS1084T-ADJ
AMS1084T-1.5
AMS1084T-1.8
AMS1084T-2.5
AMS1084T-3.3
AMS1084T-5.0
AMS1084S2-ADJ
AMS1084S2-ADJTR
AMS1084S2-1.5
AMS1084S2-1.5TR
AMS1084S2-1.8
AMS1084S2-1.8TR
AMS1084S2-2.5
TO-263-2L
TO-220-3L
TO-263-3L
TO-252-2L
AMS1084CD
AMS1084CD
AMS1084CD-1.5
AMS1084CD-1.5
AMS1084CD-1.8
AMS1084CD-1.8
AMS1084CD-2.5
AMS1084CD-2.5
AMS1084CD-3.3
AMS1084CD-3.3
AMS1084CD-5.0
AMS1084CD-5.0
AMS1084CM
AMS1084CM-ADJ
AMS1084CM-1.5
AMS1084CM-1.5
AMS1084CM-1.8
AMS1084CM-1.8
AMS1084CM-2.5
AMS1084CM-2.5
AMS1084CM-3.3
AMS1084CM-3.3
AMS1084CM-5.0
AMS1084CM-5.0
AMS1084CT
AMS1084CT-1.5
AMS1084CT-1.8
AMS1084CT-2.5
AMS1084CT-3.3
AMS1084CT-5.0
AMS1084CM
AMS1084CM
AMS1084CM-1.5
AMS1084CM-1.5
AMS1084CM-1.8
AMS1084CM-1.8
AMS1084CM-2.5
Tape & Reel
Tube
Pb free
Pb free
Tape & Reel
Tube
Pb free
Pb free
Pb free
Pb free
Tape & Reel
Tube
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Pb free
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Tape & Reel
Tube
Pb free
Pb free
Tube
Pb free
Pb free
Tube
Tube
Tube
Tube
Pb free
Pb free
Pb free
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
Tape & Reel
Tube
Pb free
Pb free
Pb free
Tape & Reel
Tube
2
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http://www.ams-semitech.com
AMS1084
PART NO
Package
Marking
Material
Pb free
Packing Type
Tape & Reel
Tube
AMS1084S2-2.5TR
AMS1084S2-3.3
AMS1084S2-3.3TR
AMS1084S2-5.0
AMS1084S2-5.0TR
TO-263-2L
AMS1084CM-2.5
AMS1084CM-3.3
AMS1084CM-3.3
AMS1084CM-5.0
AMS1084CM-5.0
Pb free
Pb free
Tape & Reel
Tube
Pb free
Pb free
Tape & Reel
BLOCK DIAGRAM
V
IN
TSD
Current
limit
V
O
Band
gap
F1
F2
A
Fixed : F1 and F2 connect, disconnect A
Adj : A connect, F1 and F2 disconnect
ADJ/GND
ABOSOLUTE MAXIMUM
RATINGS
Characteristics
Input Supply Voltage
Lead Temperature (Soldering,5 Seconds)
Symbol
Ratings
Unit
V
IN
T
LEAD
T
J
T
S
PD
ESD
20
260
150
-65 ~ +150
Internally Limited (Note1)
V
°C
°C
V
mW
V
Operating Junction Temperature Range
Storage Temperature
Range
Power Dissipation
ESD Tolerance (Minimum)
2000
Note1: The maximum allowable power dissipation is a function of maximum operating junction temperature T
J
(max)
,
the junction to ambient thermal resistance
θ
JA
, and the ambient temperature T
amb
. The maximum
allowable power dissipation at any ambient temperature is given: P
D (max)
= (T
J (max)
- T
amb
)/θ
JA,
exceeding the
maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal
shutdown. The junction to ambient thermal resistance
θ
JA
of different packages may be different, and the he
value of
θ
JA
depends on mounting technique.
3
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AMS1084
RECOMMENDED OPERATING CONDITIONS
Characteristics
Input Supply Voltage
Operating Junction Temperature Range
Symbol
Ratings
Unit
V
IN
TJ
12
0 ~ +125
V
°C
ELECTRICAL CHARACTERISTICS
(T
amb
=25°C, unless otherwise specified. Limits appearing in Boldface
type apply over the entire junction temperature range for operation, 0°C to 125°C. )
Characteristics
Symbol
Conditions
Min.
Typ.
Max.
Unit
AMS1084-ADJ,
Reference Voltage
V
REF
I
OUT
=10mA, V
IN
-V
OUT
=3V,
AMS1084-1.5,
I
OUT
=10mA, V
IN
=4.5V,
10mA≤I
OUT
≤5A,
3.0V≤V
IN
≤6V
AMS1084-1.8,
I
OUT
=10mA, V
IN
=4.8V,
10mA≤I
OUT
≤
5A, 3.3V≤V
IN
≤6V
AMS1084-2.5,
1.238 1.250 1.262
V
10mA≤I
OUT
≤5A,1.5V≤V
IN
-V
OUT
≤5V
1.225 1.250 1.270
1.485
1.47
1.782
1.764
2.475
2.45
3.267
3.234
4.95
4.9
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5
5
0.015
0.035
0.5
1
0.5
1
0.5
1
0.5
1
0.5
1
1.515
1.53
1.818
1.836
2.525
2.55
3.333
3.366
5.05
5.1
0.2
0.2
6
6
6
6
6
6
6
6
10
10
%
mV
mV
mV
mV
mV
V
V
V
V
V
Output Voltage
V
OUT
I
OUT
=10mA, V
IN
=5.5V
10mA≤I
OUT
≤5A,
4.0V≤V
IN
≤7V
AMS1084-3.3,
I
OUT
=10mA, V
IN
=6.3V,
10mA≤I
OUT
≤5A,
4.8V≤V
IN
≤8V
AMS1084-5.0,
I
OUT
=10mA, V
IN
=8V, 10mA≤
I
OUT
≤5A,
6.5V≤V
IN
≤10V
AMS1084-ADJ,
I
OUT
=10mA, 2.85V≤V
IN
≤10V
AMS1084-1.5,
I
OUT
=10mA, 3.0V≤V
IN
≤10V
AMS1084-1.8,
I
OUT
=10mA, 3.3V≤V
IN
≤10V
AMS1084-2.5,
I
OUT
=10mA, 4.0V≤V
IN
≤10V
AMS1084-3.3,
I
OUT
=10mA, 4.8V≤V
IN
≤10V
AMS1084-5.0,
I
OUT
=10mA, 6.5V≤V
IN
≤10V
Line Regulation
ΔV
OUT
4
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AMS1084
Characteristics
Symbol
Conditions
Min.
Typ.
Max.
Unit
AMS1084-ADJ,
0mA≤I
OUT
≤5A,
V
IN
-V
OUT
=3V
AMS1084-1.5,
0mA≤I
OUT
≤5A,
V
IN
-V
OUT
=3V
AMS1084-1.8,
0mA≤ I
OUT
≤5A
Load Regulation
0.1
0.2
3
7
3
7
3
7
3
7
5
10
1.45
5.5
6.5
3
5
60
72
55
0.2
0.5
0.5
0.003
60
60
60
100
0.3
0.4
15
20
15
20
15
20
15
20
20
35
1.5
%
mV
mV
mV
mV
mV
V
A
ΔV
OUT
V
IN
-V
OUT
=3V
AMS1084-2.5,
0mA≤I
OUT
≤5A,
V
IN
-V
OUT
=3V
AMS1084-3.3,
0mA≤I
OUT
≤5A,
V
IN
-V
OUT
=3V
AMS1084-5.0,
0mA≤I
OUT
≤5A,
V
IN
-V
OUT
=3V
Dropout Voltage
Current Limitting
Minimum Load Current
V
DROP
I
LIMIT
I
LOAD
(MIN)
I
OUT
=5A,
ΔV
REF
,
ΔV
OUT
=1%
V
IN
-V
OUT
=3V
V
IN
=10V (AMS1084-ADJ)
V
IN
=10V (AMS1084)
f
RIPPLE
=120Hz, C
OUT
=25μF
I
OUT
=5A, V
IN
-V
OUT
=3V
V
IN
=4.25V, I
OUT
=10mA
10mA≤I
OUT
≤5A,
1.5V≤(V
IN
-V
OUT
)≤4.5V
I
OUT
=10mA, V
IN
-V
OUT
=1.5V
T
amb
=125°C, 1000Hrs
10Hz≤f≤10kHz
TO-263-3L
10
10
mA
mA
dB
Quiescent Current
I
Q
PSRR
I
ADJ
ΔI
ADJ
Ripple Rejection
Adjust Pin Current
120
5
μA
μA
%
%
%
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Output Noise(% of Vout)
Thermal Resistance
θ
JA
TO-263-2L
TO-220-3L
TO-252-2L
°C/W
5
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