LT1085M
MILITARY VERSION
3 AMP POSITIVE
VOLTAGE REGULATOR
INPUT
SAFE AREA
PROTECT ION
CU RR EN T
LIMITING
AMPLIFIER
L IM I T
OU TPUT
SEN SE
T H E R M AL
O V ER L O AD
FEATURES
• Low Dropout Performance
• Fixed or Adjustable Voltages
• Fixed Output Voltages of 3.3V, 5V & 12V
• Adjustable Output Voltage Range 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)
DEVICE
(1)
LT1085MK–XX
LT1085MG–XX
LT1085MIG–XX
LT1085MSM–XX
PACKAGE
TO–3
TO–257
Isolated TO–257
TO–220SM
VOL T AGE
REGUL ATION
AMPLIFIER
V
R E F
ADJUST
DESCRIPTION
The LT1085 voltage regulators are monolithic
Note
integrated circuits designed for use in applications
1) –XX = Voltage Option: 3.3, 5 or 12
requiring a well regulated positive output voltage
–XX = Left blank for Adjustable Option.
with low input-output differential voltage.
Features include full power usage of up to 3A load current, internal current limiting and thermal 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.
ABSOLUTE MAXIMUM RATINGS
(T
case
= 25°C unless otherwise stated)
V
IN
P
D
R
q
JC
R
q
JC
R
q
JC
T
J
T
STG
T
LEAD
Input – Output Voltage Differential
Power Dissipation
Thermal Resistance Junction To Case
Thermal Resistance Junction To Case
Thermal Resistance Junction To Case
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (for 10 sec.)
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
35V
Internally limited *
TO–3
TO–3
SMD1
SMD1
TO–257
TO–257
Control
Power
Control
Power
Control
Power
Control
Power
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
Prelim. 4/95
* These ratings are only applicable for power dissipations of 30 Watts over a limited range of V
IN
– V
OUT
.
Semelab plc.
SEME-LAB [ SEME LAB ]
