Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Prelim. 4/95
LT1085M
MILITARY VERSION
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
DEVICE(1) PACKAGE
LT1085MK–XX TO–3
LT1085MG–XX TO–257
LT1085MIG–XX Isolated TO–257
LT1085MSM–XX TO–220SM
DESCRIPTION
The LT1085 voltage regulators are monolithic
integrated circuits designed for use in applications
requiring a well regulated positive output voltage
with low input-output differential voltage.
Features include full power usage of up to 3A load current, internal current limiting and ther mal shutdown. Safe area
protection on the die is also included, providing protection of the series pass Darlington transistor under most conditions.
The hermetically sealed TO–3 packages are utilised for high reliablitiy and low thermal resistance, whilst the SMD1
package is designed for surface mount applications.
Note
1) –XX = Voltage Option: 3.3, 5 or 12
–XX = Left blank for Adjustable Option.
3 AMP POSITIVE
VOLTAGE REGULATOR
VIN Input – Output Voltage Differential
PDPower Dissipation
R
q
JC Ther mal Resistance Junction To Case TO–3 Control
TO–3 Power
R
q
JC Ther mal Resistance Junction To Case SMD1 Control
SMD1 Power
R
q
JC Ther mal Resistance Junction To Case TO–257 Control
TO–257 Power
TJOperating Junction Temperature Range Control
Power
TSTG Storage Temperature Range
TLEAD Lead Temperature (for 10 sec.)
35V
Inter nally limited *
0.93°C / W
3.0°C / W
0.79°C / W
4.0°C / W
0.79°C / W
4.0°C / W
–55 to 150°C
–55 to 200°C
–65 to 150°C
300°C
FEATURES
• Low Dropout Performance
• Fixed or Adjustable Voltages
• Fixed Output Voltages of 3.3V, 5V & 12V
• Adjustable Output Voltage Rang e From 1.2V
• Line Regulation 0.015% / V Typical.
• Load Regulation 0.01% Typical.
• Available in Hermetically Sealed TO–3,SMD1 and
TO–257 (isolated & non-isolated) Packages.
• Military Temperature Range (–55 to +150°C)