AMS AMS1085S-1.5TR 3a ldo voltage regulator Datasheet

AMS1085
3A LDO VOLTAGE REGULATOR
DESCRIPTION
The AMS1085 is a positive low voltage dropout regulator, voltage
dropout is only 1.18V at 3A.
AMS1085 has two versions: the fixed version and the adjustable
version. VOUT has a tolerance of less than 1% for fixed versions
TO-263-2L
TO-220-3L
TO-263-3L
TO-252-2L
1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version.
The AMS1085 integrates overheating protection and current limit
circuits. It is an suitable for all electronic products.
FEATURES
* 1% accuracy for fixed output VOUT while the voltage is 1.5V,
1.8V, 2.5V, 3.3V, 5.0V and the adjustable output VOUT
* Low Dropout Voltage: 1.18V at 3A output current
APPLICATIONS
* High Efficiency Linear Regulators
* Current Limiting: 4.5A
* SMPS Post-Regulator
*Load regulation : 0.1% typical (adjustable version)
* Battery Charger
*Line regulation : 0.015% typical (adjustable version)
* Microprocessor Supply
* Temperature Range: 0°C to 125°C
*Desktop PCs, RISC and embedded processors'supply
ORDERING INFORMATION (Temperature range: 0°C ~125°C)
AMS1085
TR: Tape & Reel
Blank: Tube
Package
Blank: Pb free
CD: TO-252-2L
: Adjustable Output
1.5: Fixed Output 1.5V
CM: TO-263-3L CT: TO-220-3L
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
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
PART NO
Marking
Package
Material
Packing Type
AMS1085D-ADJ
AMS1085CD
Pb free
Tube
AMS1085D-ADJTR
AMS1085CD
Pb free
Tape & Reel
AMS1085D-1.5
AMS1085CD-1.5
Pb free
Tube
AMS1085D-1.5TR
AMS1085CD-1.5
Pb free
Tape & Reel
AMS1085D-1.8
AMS1085CD-1.8
Pb free
Tube
AMS1085CD-1.8
Pb free
Tape & Reel
AMS1085CD-2.5
Pb free
Tube
AMS1085D-2.5TR
AMS1085CD-2.5
Pb free
Tape & Reel
AMS1085D-3.3
AMS1085CD-3.3
Pb free
Tube
AMS1085D-3.3TR
AMS1085CD-3.3
Pb free
Tape & Reel
AMS1085D-5.0
AMS1085CD-5.0
Pb free
Tube
AMS1085D-5.0TR
AMS1085CD-5.0
Pb free
Tape & Reel
AMS1085S-ADJ
AMS1085CM
Pb free
Tube
AMS1085S-ADJTR
AMS1085CM
Pb free
Tape & Reel
AMS1085S-1.5
AMS1085CM-1.5
Pb free
Tube
AMS1085S-1.5TR
AMS1085CM-1.5
Pb free
Tape & Reel
AMS1085S-1.8
AMS1085CM-1.8
Pb free
Tube
AMS1085CM-1.8
Pb free
Tape & Reel
AMS1085CM-2.5
Pb free
Tube
AMS1085S-2.5TR
AMS1085CM-2.5
Pb free
Tape & Reel
AMS1085S-3.3
AMS1085CM-3.3
Pb free
Tube
AMS1085S-3.3TR
AMS1085CMS-3.3
Pb free
Tape & Reel
AMS1085S-5.0
AMS1085CM-5.0
Pb free
Tube
AMS1085S-5.0TR
AMS1085CM-5.0
Pb free
Tape & Reel
AMS1085T-ADJ
AMS1085CT
Pb free
Tube
AMS1085T-1.5
AMS1085CT-1.5
Pb free
Tube
AMS1085CT-1.8
Pb free
Tube
AMS1085CT-2.5
Pb free
Tube
AMS1085T-3.3
AMS1085CT-3.3
Pb free
Tube
AMS1085T-5.0
AMS1085CT-5.0
Pb free
Tube
AMS1085S2-ADJ
AMS1085CM
Pb free
Tube
AMS1085S2-ADJTR
AMS1085CM
Pb free
Tape & Reel
AMS1085S2-1.5
AMS1085CM-1.5
Pb free
Tube
AMS1085CM-1.5
Pb free
Tape & Reel
AMS1085S2-1.8
AMS1085CM-1.8
Pb free
Tube
AMS1085S2-1.8TR
AMS1085CM-1.8
Pb free
Tape & Reel
AMS1085S2-2.5
AMS1085CM-2.5
Pb free
Tube
AMS1085D-1.8TR
AMS1085D-2.5
AMS1085S-1.8TR
AMS1085S-2.5
AMS1085T-1.8
AMS1085T-2.5
AMS1085S2-1.5TR
TO-252-2L
TO-263-3L
TO-220-3L
TO-263-2L
2
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
Marking
Package
PART NO
Material
Packing Type
AMS1085S2-2.5TR
AMS1085CM-2.5
Pb free
Tape & Reel
AMS1085S2-3.3
AMS1085CM-3.3
Pb free
Tube
AMS1085CM-3.3
Pb free
Tape & Reel
AMS1085S2-5.0
AMS1085CM-5.0
Pb free
Tube
AMS1085S2-5.0TR
AMS1085CM-5.0
Pb free
Tape & Reel
TO-263-2L
AMS1085S2-3.3TR
BLOCK DIAGRAM
VIN
Current
limit
TSD
VO
Band
gap
Fixed : F1 and F2 connect, disconnect A
F1
F2
Adj : A connect, F1 and F2 disconnect
A
ABOSOLUTE MAXIMUM
RATINGS
Characteristics
ADJ/GND
Symbol
Ratings
Unit
VIN
20
V
TLEAD
260
°C
Operating Junction Temperature Range
TJ
150
°C
Storage Temperature
Range
Power Dissipation
TS
-65 ~ +150
V
PD
Internally Limited (Note1)
mW
ESD
2000
V
Input Supply Voltage
Lead Temperature (Soldering,5 Seconds)
ESD Tolerance (Minimum)
Note1: The maximum allowable power dissipation is a function of maximum operating junction temperature TJ
(max),
the junction to ambient thermal resistance θJA, and the ambient temperature Tamb. The maximum
allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - Tamb)/θJA, 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 θJA of different packages may be different, and the he
value of θJA depends on mounting technique.
3
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
RECOMMENDED OPERATING CONDITIONS
Characteristics
Ratings
Symbol
Input Supply Voltage
Operating Junction Temperature Range
Unit
VIN
12
V
TJ
0 ~ +125
°C
ELECTRICAL CHARACTERISTICS (Tamb=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
AMS1085-ADJ,
Reference Voltage
VREF
IOUT=10mA, VIN-VOUT=3V,
1.238 1.250 1.262
V
10mA≤IOUT≤3A,1.5V≤VIN-VOUT≤5V 1.225 1.250 1.270
AMS1085-1.5,
IOUT=10mA, VIN=4.5V,
1.485
1.5
1.515
10mA≤IOUT≤3A, 3.0V≤VIN≤6V
1.47
1.5
1.53
IOUT=10mA, VIN=4.8V,
1.782
1.8
1.818
10mA≤IOUT≤ 3A, 3.3V≤VIN≤6V
1.764
1.8
1.836
IOUT=10mA, VIN=5.5V
2.475
2.5
2.525
10mA≤IOUT≤3A, 4.0V≤VIN ≤7V
2.45
2.5
2.55
IOUT=10mA, VIN=6.3V,
3.267
3.3
3.333
10mA≤IOUT≤3A, 4.8V≤VIN≤8V
3.234
3.3
3.366
IOUT=10mA, VIN=8V, 10mA≤
4.95
5
5.05
IOUT≤3A, 6.5V≤VIN≤10V
4.9
5
5.1
AMS1085-ADJ,
0.015
0.2
IOUT=10mA, 2.85V≤VIN≤10V
0.035
0.2
0.5
6
1
6
0.5
6
1
6
0.5
6
1
6
0.5
6
1
6
0.5
10
1
10
V
AMS1085-1.8,
V
AMS1085-2.5,
Output Voltage
VOUT
V
AMS1085-3.3,
V
AMS1085-5.0,
AMS1085-1.5,
IOUT=10mA, 3.0V≤VIN≤10V
AMS1085-1.8,
Line Regulation
ΔVOUT
IOUT=10mA, 3.3V≤VIN≤10V
AMS1085-2.5,
IOUT=10mA, 4.0V≤VIN≤10V
AMS1085-3.3,
IOUT=10mA, 4.8V≤VIN≤10V
AMS1085-5.0,
IOUT=10mA, 6.5V≤VIN≤10V
4
Advanced Monolithic Systems
http://www.ams-semitech.com
V
%
mV
mV
mV
mV
mV
AMS1085
Characteristics Symbol
Load Regulation
ΔVOUT
Dropout Voltage
VDROP
Current Limitting
ILIMIT
Minimum Load Current
ILOAD
(MIN)
Quiescent Current
IQ
Ripple Rejection
PSRR
Adjust Pin Current
IADJ
Adjust Pin Current Change
ΔIADJ
Conditions
Min.
Typ.
Max.
AMS1085-ADJ, 0mA≤IOUT≤3A,
0.1
0.3
VIN-VOUT=3V
0.2
0.4
AMS1085-1.5, 0mA≤IOUT≤3A,
3
15
VIN-VOUT=3V
7
20
AMS1085-1.8, 0mA≤ IOUT≤3A
3
15
VIN-VOUT=3V
7
20
AMS1085-2.5, 0mA≤IOUT≤3A,
3
15
VIN-VOUT=3V
7
20
AMS1085-3.3, 0mA≤IOUT≤3A,
3
15
VIN-VOUT=3V
7
20
AMS1085-5.0, 0mA≤IOUT≤3A,
5
20
VIN-VOUT=3V
10
35
IOUT=3A, ΔVREF, ΔVOUT=1%
1.18
1.3
VIN-VOUT=3V
4.5
Unit
%
mV
mV
mV
mV
mV
V
A
VIN=10V (AMS1085-ADJ)
3
10
mA
VIN=10V (AMS1085)
5
10
mA
fRIPPLE=120Hz, COUT=25μF
IOUT=3A, VIN-VOUT=3V
60
72
VIN=4.25V, IOUT=10mA
10mA≤IOUT≤3A,
1.5V≤(VIN-VOUT)≤4.5V
dB
55
120
μA
0.2
5
μA
Temperature Stability
IOUT=10mA, VIN-VOUT=1.5V
0.5
%
Long Term Stability
Tamb=125°C, 1000Hrs
0.5
%
RMS Output Noise(% of Vout)
10Hz≤f≤10kHz
0.003
%
Thermal Resistance
θJA
TO-263-3L
60
TO-263-2L
60
TO-220-3L
60
TO-252-2L
100
5
Advanced Monolithic Systems
http://www.ams-semitech.com
°C/W
AMS1085
PIN CONFIGURATION
TO-252-2L
TO-263-2L
1
2
TO-263-3L
1
3
2
1
2
TO-220-3L
1
3
2
3
3
PIN DESCRIPTION
Functions
Pin No.
Pin name
I/O
1
GND/ADJ
--/O
2
VOUT
O
Output voltage
3
VIN
I
Input supply voltage
Ground/ADJ
FUNCTION DESCRIPTION
The AMS1085 is a LDO regulator, its pass transistor is made up of a single NPN transistor being driven by a PNP.
The dropout voltage is defined as: VDROP = VBE+ VSAT.
The AMS1085 has two versions: the fixed output version and the adjustable output version. Output voltages can be
1.5V, 1.8V, 2.5V, 3.3V, and 5.0V.On-chip thermal shut-down circuit provides protection against overload
and overheating that would create excessive junction temperature.
The adjustable output version requires a 22 μF or bigger tantalum capacitor at output for AMS1085 stability. The
capacitor for fixed output version can be smaller and should be determined base on actual application. Generally,
the stability of linear regulator stability decreases with output currents increase.
6
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
TYPICAL APPLICATION CIRCUIT
AMS1085
Vin
Vin
Vout
Vout
GND
10uF
22uF
Figure 1. Typical Fixed Output Voltage
AMS1085-ADJ
Vin
Vin
ADJ
10uF
Vout
Vout
R1
22uF
R2
Vout=Vref X (1+R2/R1) + Iadj X R2
Figure 2. Typical Adjustable Output Voltage
Note: The above circuit and parameters are reference only, please set the parameters of the real application
circuit based on the real test.
7
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
TYPICAL CHARACTERISTICS CURVES
PSRR vs. Frequency
Output Voltage Change vs. Temperature Stability
90
80
70
60
50
40
30
20
10
0
2.0
1.0
0
-1.0
-2.0
-50 -25
0
25
50
75 100 125 150
10
Temperature
100
Short-Circuit Current vs. Dropout Voltage
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
5
4
2
0
6
5
4
3
2
1
0
2
4
6
8
10
12
Dropout Voltage (V)
100
90
80
70
60
50
40
30
20
10
0
Vout=10V
Iin=0.2A
Cin=1uF Tantalum
Cout=10uF Tantalum
100
Time (uS)
Cadj=0
Cin=1uF
Cout=10uF Tantalum
Vout=10V
Vin=13V
PRELOAD=100mA
0
50
100
Adjust Pin Current vs. Temperature
Cadj=0
0
1M
Time (uS)
Line Transient Response
60
40
20
0
-20
-40
-60
14
13
12
100K
Load Transient Response
7
0
1K
10K
Frequency (Hz)
200
-50 -25
0
25 50 75
Temperature
8
Advanced Monolithic Systems
http://www.ams-semitech.com
100 125 150
AMS1085
PACKAGE OUTLINE
Unit: mm
TO-252-2L
6.50±0.25
2.30±0.20
5.30±0.10
5.55±0.25
3.80 REF
1.50±0.15
0.505+/-0.10
0.80±0.10
1.59±0.19
0~0.127
2.30
0.60±0.10
0.505±0.1
4.60+/-0.10
TO-220-3L
2.74±0.20
Unit: mm
4.57±0.20
10.16±0.20
1.27±0.10
8.95±0.30
12.26±0.20
Φ3.835±0.100
2.67±0.15
13.60±0.20
3.76±0.20
1.27
0.81
0.42±0.11
2.54±0.10
5.08±0.10
9
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS1085
PACKAGE OUTLINE
Unit: mm
TO-263-2L
10.15+/-0.30
4.57+/-0.10
1.27+/-0.10
1.27+/-0.10
0.30~0.55
0~0.15
0.81+/-0.10
2.54TYP
4.98~5.18
TO-263-3L
Unit: mm
4.57±0.10
15.25±0.20
8.70±0.20
1.27±0.10
0~0.15
2.54±0.20
5.28±0.20
1.27
0.81
2.54TYP
10.16±0.15
10
Advanced Monolithic Systems
http://www.ams-semitech.com
+0.15
0.38 -0.07
AMS1085
Disclaimer:
•
AMS reserves the right to make changes to the information herein for the improvement of the design and performance
without further notice! Customers should obtain the latest relevant information before placing orders and should verify
that such information is complete and current.
•
All semiconductor products malfunction or fail with some probability under special conditions. When using AMS products
in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety
standards strictly and take essential measures to avoid situations in which a malfunction or failure of such AMS products
could cause loss of body injury or damage to property.
•
AMS will supply the best possible product for customers!
11
Advanced Monolithic Systems
http://www.ams-semitech.com
Similar pages