ELM ELM1085DG Bipolar 3a ldo voltage regulator Datasheet

ELM1085DG Bipolar 3A LDO Voltage regulator
■General description
ELM1085DG is positive and bipolar LDO three terminal voltage regulator with 3A output current capability.
This series includes thermal shutdown protection and short circuit current limiter. ELM1085 series is only
available in adjustable version.
■Features
■Application
•
•
•
•
•
•
•
•
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Output voltage range (adj.) : 1.27V to 5.55V
Line regulation
: Typ.0.5%
Load regulation
: Typ.0.5%
LDO voltage
: 1.3V typical at up to 3A
Package
: TO-252
SCSI terminator
Linear regulator
Battery chargers
Micro-controller
■Maximum absolute ratings
Parameter
Power supply voltage
Power dissipation
Thermal resistance junction to case
Thermal resistance junction to ambient
Operating junction temperature
Storage temperature
Lead temperature(soldering 10s.)
Symbol
Vcc
Pd
Rθjc
Rθja
Top
Tstg
Tlead
Limit
7
Internally limited
5
70
0 to +125
-40 to +150
260
Unit
V
W
°C/W
°C/W
°C
°C
°C
■Selection guide
ELM1085DG-S
Symbol
a
b
c
Package
Product version
Taping direction
ELM1085 D G - S
↑ ↑ ↑
a b c
D: TO-252
G
S: Refer to PKG file
* Taping direction is one way.
■Pin configuration
TO-252(TOP VIEW)
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Pin No.
1
2/TAB
3
�
�
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3- 1
Pin name
ADJ/GND
VOUT
VIN
ELM1085DG Bipolar 3A LDO Voltage regulator
■Typical application
Vout=Vref (1+R2/R1)+Iadj×R2
VIN
Vin
ELM1085DG
Cin
VOUT
Vref
ADJ
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Vout
R1
Cout
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Iadj
R2
* Cin needed if device is far from filter capacitors.
* Cout required for stability.
* We recommend to use Min. 10μF tantalum condenser.
■Electrical characteristics
Parameter
Reference voltage
Line regulation
Load regulation
Dropout voltage
Current limit
Min.load current
Adjust Pin current
Symbol
Vref
ΔVout/ΔVin
ΔVout/ΔIout
Vdif
Ilim
Il (min)
Iadj
RMS output noise
Vn
Ripple rejection ratio
RR
Condition
Iout=10mA, Vin=5V
Iout=10mA, Vin=(Vout+1.5V) to 7V
Iout=10mA to 3A, Vin-Vout=3V
Iout=3A, ΔVref=1%
Vin-Vout=2V
1.5V≤(Vin-Vout)≤5.75V
f=120Hz, Vin=5V, Iout=3A, Cout=22μF
Min.
1.23
4
60
■Marking
TO-252
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L
1085
D
G
a to i
3- 2
:
:
:
:
:
LDO
Product No.code
PKG type (TO-252)
Pb-Free package mark
Production code
Top=25°C
Typ. Max. Unit
1.25
1.27 V
0.5
2.0
%
0.5
2.5
%
1.30
1.45 V
5
A
10
mA
55
100 μA
Vout×
mV
0.003%
72
dB
ELM1085DG
Bipolar 3A LDO Voltage regulator
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■Typical
characteristics
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Dropout Voltage vs. Output Current
Short-Circuit Current vs.Temperature
2.0
10
T�J=-40° C
1.6
T�J=125° C
T�J=25° C
1.4
1.2
1.0
0.8
0.5
0.4
V��IN-VOUT(SHORT
CIRCUIT)=5V
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9
Short-Circuit Current(A)
Dropout Voltage(V)
1.8
8
7
6
5
4
3
0.2
V��IN-V���
OUT(SHORT CIRCUIT)=3.3V
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out
2
0
0
0.5
1.0
1.5
2.0
2.5
1
-50
3.0
0
Output Current(A)
100
A)
1
Adjust Pin Current (
Output Voltage Change(%)
1.5
0.5
0
-0.5
-1
90
80
70
60
50
40
30
20
10
-1.5
-25
0
25
50
75 100
0
-50
125 150
50
75
100
125 150
18
80
16
70
14
60
12
50
10
Power(W)
Ripple Rejection(dB)
25
20
90
40
V��IN -V O���
UT =3V
V�����������
R IP PLE(p-p) =1V
I���
O UT =3A
100
8
6
4
2
0
10
0
Maximum Power Dissipation*
R ipple R ejection vs. Frequency
10
-25
Temperature(° C)
Temperature(° C)
20
150
Adjust Pin Current vs.Temperature
2
30
100
Temperature(°C)
Percent Change in Output Voltage vs.Temperature
-2
-50
50
1k
10k
100k
0
50
70
90
110
130
150
Case Temperature(° C)
Frequency(H z)
*as Limited by Maximum Junction Temperature
3 -� 3
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