Datasheet

2
LT1083/LT1084/LT1085 Fixed
TAB IS
OUTPUT
T PACKAGE
3-LEAD PLASTIC TO-220
V
IN
V
OUT
GND
FRONT VIEW
3
2
1
Power Dissipation.............................. Internally Limited
Input Voltage* ........................................................ 30V
Operating Input Voltage
3.3V, 3.6V Devices ........................................... 20V
5V Devices ....................................................... 20V
12V Devices ..................................................... 25V
Operating Junction Temperature Range
“C” Grades
Control Section .............................. 0°C to 125°C
Power Transistor............................ 0°C to 150°C
“M” Grades
Control Section .......................... –55°C to 150°C
Power Transistor........................ –55°C to 200°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
100% Thermal Limit Functional Test.
*Although the devices maximum operating voltage is limited, (20V for a
3V, 5V device, and 25V for a 12V device) the devices are guaranteed to
withstand transient input voltages up to 30V. For input voltages greater
than the maximum operating input voltage some degradation of
specifications will occur. For input/output voltage differentials greater than
15V, a minimum external load of 5mA is required to maintain regulation.
ORDER PART NUMBER
LT1083CP-5
LT1083CP-12
LT1084CP-5
LT1084CP-12
LT1083CK-5
LT1083CK-12
LT1083MK-5
LT1083MK-12
LT1084CK-5
LT1084CK-12
LT1084MK-5
LT1084MK-12
LT1085CK-5
LT1085CK-12
LT1085MK-5
LT1085MK-12
θ
JA
= 35°C/W
θ
JA
= 45°C/W
θ
JA
= 50°C/W
LT1084CT-3.3
LT1084CT-5
LT1084CT-12
LT1085CT-3.3
LT1085CT-3.6
LT1085CT-5
LT1085CT-12
LT1085CM-3.3
LT1085CM-3.6
LT1085IM-3.6
θ
JA
= 30°C/W*
*WITH PACKAGE SOLDERED TO 0.52IN
2
COPPER AREA OVER BACKSIDE GROUND
PLANE OR INTERNAL POWER PLANE. θ
JA
CAN
VARY FROM 20°C/W TO > 40°C/W DEPENDING
ON MOUNTING TECHNIQUE.
ABSOLUTE AXI U RATI GS
WWWU
(Note 1)
PRECO DITIO I G
U
UU
PACKAGE/ORDER I FOR ATIO
UU
W
1
2
V
IN
CASE IS
OUTPUT
GND
K PACKAGE
2-LEAD TO-3 METAL CAN
V
IN
V
OUT
GND
P PACKAGE
3-LEAD TO-3P PLASTIC
FRONT VIEW
TAB IS
OUTPUT
3
2
1
ORDER PART NUMBER
TAB IS
OUTPUT
M PACKAGE
3-LEAD PLASTIC DD
FRONT VIEW
V
IN
V
OUT
GND
3
2
1
OBSOLETE NOT RECOMMENDED
FOR NEW DESIGNS
Consult factory for parts specified with wider operating temperature ranges.