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
LT1083HN
02/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
MECHANICAL DATA
Dimensions in mm
123
17.65 (0.695)
17.39 (0.685)
4.19 (0.165)
3.94 (0.155)
Dia.
13.84 (0.545)
13.58 (0.535)
17.96 (0.707)
17.70 (0.697)
19.05 (0.750)
12.70 (0.500)
1.65 (0.065)
1.39 (0.055)
Typ.
5.08 (0.200)
BSC 3.56 (0.140)
BSC
21.21 (0.835)
20.70 (0.815)
1.14 (0.707)
0.88 (0.035)
6.86 (0.270)
6.09 (0.240)
7.5 AMP LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR IN
TO258 HERMETIC PACKAGE
FEATURES
• Adjustable Output Voltage
• Output Voltage Tolerance ±1%
• Hermetic Isolated TO258
• Built in Thermal Overload Protection
• Short Circuit Current Limit
• Low Dropout Voltage
• Screening Options Available
TO–258 METAL PACKAGE
ABSOLUTE MAXIMUM RATINGS @25°C
Pin 1– Adjust Pin 2 – Vout Pin 3 – Vin
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
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.
Parameter Test Conditions Min. Typ. Max. Unit
1.238 1.262
1.225 1.270
0.2
0.5
0.3
0.4
1.5
0.015
60
120
5.0
10
8.0
0.4
1.5
1.0
LT1083HN
02/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
VREF Reference Voltage
VOUT Line Regulation (Note 1)
VIN
VOUT Load Regulation
VIN
VDO Dropout Voltage
Thermal Regulation
VIN Ripple Rejection
VOUT
IAdj Ajust Pin Current
3IAdj Ajust Pin Current Change
IMin Minimum Load Current
ILim Current Limit
VOUT Temperature Stability (Note 2)
T
VOUT Long Term Stability (Note 2)
T
VIN - VOUT =3.0V
IOUT = 10mA TA= 25°C
1.5V
£
VIN - VOUT
£
25V
10mA
£
IOUT
£
IFL
1.5
£
VIN - VOUT
£
15V
IOUT = 10mA TA= 25°C
15V
£
VIN - VOUT
£
35V
IOUT =10mA
VIN - VOUT =3.0V TA= 25°C
10mA
£
IOUT
£
IFL
IOUT = IFL
D
VREF = 1%
30ms pulse TA= +25°C
f = 120Hz, CAdj = 25
m
F
COUT = 25
m
F (tantalum), IFL = 3.0A
VIN - VOUT =3.0V
1.5V
£
VIN - VOUT
£
25V
10mA
£
IOUT
£
IFL
1.5V
£
VIN - VOUT
£
25V
10mA
£
IOUT
£
IFL
VIN - VOUT = 25V
VIN - VOUT = 5.0V
VIN - VOUT = 25V
Tj = -55 to +125°C
TA= +125°C, t = 1000hrs
V
%
%
V
%W
dB
m
A
m
A
mA
A
%
ELECTRICAL CHARACTERISTICS (Per Diode)
•
•
•
•
•
•
•
•
•
•
•
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.
4I
FL is defined as the minimum value of current limit as a function of input to output voltage.
