LT1083HN
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)
7.5 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
• Adjustable 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 LT1083HN low drop positive adjustable
regulator is designed to provide 7.5A 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.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
02/00
LT1083HN
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)
•
•
•
•
•
•
8.0
0.4
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 60 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.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
02/00
