LT1085GMD Datasheet, PDF (1/3 Pages) Seme LAB – 3 AMP POSITIVE VOLTAGE REGULATOR

LT1085GMD
LT1085IGDII
LT1085SMD
3 AMP POSITIVE
VOLTAGE REGULATOR
CURRENT
LIMITING
AMPLIFIER
T HERM AL
O VER LO AD
LIMIT
SENSE
INPUT
SAFE AREA
PROTECTION
OU TP U T
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)
VOLTAGE
REGULATION
AMPLIFIER
V_{R E F}
AD JU S T
DESCRIPTION
The LT1085 voltage regulators are monolithic inte-
grated circuits designed for use in applications
requiring a well regulated positive output voltage
with low input-output differential voltage.
DEVICE⁽¹⁾
PACKAGE
LT1085K–XX
LT1085G–XX
LT1085IG–XX
LT1085SMD–XX
TO–3
TO–257
Isolated TO–257
SMD1
Note
1) –XX = Voltage Option: 3.3, 5 or 12
–XX = Left blank for Adjustable Option.
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 Input – Output Voltage Differential
35V
P_D
Power Dissipation
Internally limited *
R_qJC Thermal Resistance Junction To Case
TO–3
TO–3
Control
Power
0.93°C / W
3.0°C / W
R_qJC Thermal Resistance Junction To Case
SMD1
SMD1
Control
Power
0.79°C / W
4.0°C / W
R_qJC Thermal Resistance Junction To Case
TO–257
TO–257
Control
Power
0.79°C / W
4.0°C / W
T_J
Operating Junction Temperature Range
Control
Power
–55 to 150°C
–55 to 200°C
T_STG Storage Temperature Range
–65 to 150°C
T_LEAD Lead Temperature (for 10 sec.)
* These ratings are only applicable for power dissipations of 30 Watts over a limited range of V_IN – V_OUT.
300°C
Semelab plc. Telephone [phone]. Fax [phone].
E-mail: [e-mail] Website: http://www.semelab.co.uk
Prelim. 7/00