LM1084HN
MECHANICAL DATA
Dimensions in mm
17.65 (0.695)
17.39 (0.685)
6.86 (0.270)
6.09 (0.240)
1.14 (0.707)
0.88 (0.035)
5 AMP LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR IN
TO258 HERMETIC PACKAGE
17.96 (0.707)
17.70 (0.697)
13.84 (0.545)
13.58 (0.535)
1 2 3
4.19 (0.165)
3.94 (0.155)
Dia.
21.21 (0.835)
20.70 (0.815)
19.05 (0.750)
12.70 (0.500)
FEATURES
• Ajustable Output Voltage
• Output Voltage Tolerance ±1%
• Hermetic Isolated TO258
5.08 (0.200)
BSC
1.65 (0.065)
1.39 (0.055)
Typ.
3.56 (0.140)
BSC
• Built in Thermal Overload Protection
• Short Circuit Current Limit
• Low Dropout Voltage
• Screening Options Available
The LM1084HN low drop positive adjustable
regulator is designed to provide 5A with
higher efficiency than a standard device. All
internal circuitry is designed to operate
down to 1V input/output differential.
TO–258 METAL PACKAGE
Pin 1– Adjust
Pin 2 – Vout
Pin 3 – Vin
ABSOLUTE MAXIMUM RATINGS
@25°C
Power Dissipation (Pd)
Input - Output Voltage Differential
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering 10 seconds)
Thermal Resistance:
q
jc (Isolated)
q
jc (Non-Isolated)
Maximum Output Current
Internally Limited
35V
-55°C to + 150°C
-65°C to + 150°C
300°C
2.75°C/W
2.3°C/W
5.0A
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website:
http://www.semelab.co.uk
E-mail:
sales@semelab.co.uk
02/00
LM1084HN
ELECTRICAL CHARACTERISTICS
(Per Diode)
Parameter
Test Conditions
V
IN
- V
OUT
=3.0V
V
REF
Reference Voltage
I
OUT
= 10mA
T
A
= 25°C
1.5V
£
V
IN
- V
OUT
£
25V
10mA
£
I
OUT
£
I
FL
1.5
£
V
IN
- V
OUT
£
15V
V
OUT
V
IN
Line Regulation (Note 1)
I
OUT
= 10mA
T
A
= 25°C
15V
£
V
IN
- V
OUT
£
35V
I
OUT
=10mA
V
IN
- V
OUT
=3.0V
V
OUT
V
IN
V
DO
Dropout Voltage
Thermal Regulation
V
IN
V
OUT
I
Adj
3
I
Adj
Min.
1.238
Typ.
Max.
1.262
Unit
V
•
•
1.225
1.270
0.2
%
0.5
0.3
%
T
A
= 25°C
Load Regulation
10mA
£
I
OUT
£
I
FL
•
I
OUT
= I
FL
30ms pulse
D
0.4
1.5
0.015
60
V
%W
dB
V
REF
= 1%
•
T
A
= +25°C
Ripple Rejection
f = 120H
z,
C
Adj
= 25
m
F
C
OUT
= 25
m
F (tantalum), I
FL
= 3.0A
•
V
IN
- V
OUT
=3.0V
1.5V
£
V
IN
- V
OUT
£
25V
10mA
£
I
OUT
£
I
FL
1.5V
£
V
IN
- V
OUT
£
25V
10mA
£
I
OUT
£
I
FL
V
IN
- V
OUT
= 25V
V
IN
- V
OUT
= 5.0V
V
IN
- V
OUT
= 25V
Tj = -55 to +125°C
T
A
= +125°C, t = 1000hrs
Ajust Pin Current
Ajust Pin Current Change
Minimum Load Current
Current Limit
Temperature Stability (Note 2)
Long Term Stability (Note 2)
•
•
•
•
•
•
5.5
0.3
120
5.0
10
m
A
A
m
I
Min
I
Lim
V
OUT
T
V
OUT
T
mA
A
1.5
%
1.0
Notes:
1 Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique.
Power dissipation is internally limted. Regulation is guaranteed up to maximum power dissipation of 45 W. Power
dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum power
dissipation is not available over the full input/output voltage range.
2 Guaranteed by design, characterization or correlation to other tested parameters.
3
•
Specification applies over the full operating temperature range.
4 I
FL
is defined as the minimum value of current limit as a function of input to output voltage.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website:
http://www.semelab.co.uk
E-mail:
sales@semelab.co.uk
02/00
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