LT1118CST-2.5 Linear Technology, LT1118CST-2.5 Datasheet - Page 6

• Manufacturer Part Number: LT1118CST-2.5
• Description: IC LDO REG FXD 2.5V 800MA SOT223
• Manufacturer: Linear Technology

Specifications of LT1118CST-2.5

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.5V
• Voltage - Input: Up to 15V
• Voltage - Dropout (typical): 1V @ 800mA
• Number Of Regulators: 1
• Current - Output: 800mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Limit (min): -

OPERATION
LT1118/LT1118-2.5/
LT1118-2.85/LT1118-5
TYPICAL APPLICATIONS
connected to the die substrate. Table 1 shows measured
thermal resistance from junction to ambient for the LT1118
connected to various sized PC board ground planes. The
power dissipated in the LT1118 varies with input voltage
and loading. When the regulator is sourcing current the
power which must be dissipated by the package is:
6
P
D
= (V
IN
– V
OUT
) • I
LOAD
V
5V
IN
5V
1μF
+
2.2μF
IN
IN
SCSI Active Terminator
Power Supply Splitter
LT1118-2.85
LT1118-2.5
GND
GND
TERMPWR
OUT
OUT
When the regulator is sinking load current, power dissipa-
tion is nearly independent of V
as:
Heat sinking to the IC package must consider the worst
case power dissipation which may occur.
Table 1. Measured Thermal Resistance from Junction to Ambient
for the LT1118
Free Air
1 Sq Inch Copper
4 Sq Inch Copper
P
D
= V
1μF
1μF
OUT
•
•
•
•
•
•
•
•
110Ω
110Ω
110Ω
110Ω
110Ω
• I
LOAD
5V
ANALOG
COMMON
2.5V
1118 TA04
27 LINES
1118 TA03
S8 Package
120°C/W
55°C/W
35°C/W
IN
and can be calculated
SOT-223
95°C/W
53°C/W
38°C/W
1118fd