LP3852EMP-2.5/NOPB National Semiconductor, LP3852EMP-2.5/NOPB Datasheet - Page 15

• Manufacturer Part Number: LP3852EMP-2.5/NOPB
• Description: IC, LDO VOLT REG, 2.5V, 1.5A, SOT-223-5
• Manufacturer: National Semiconductor

Specifications of LP3852EMP-2.5/NOPB

• Primary Input Voltage: 7V
• Output Voltage Fixed: 2.5V
• Dropout Voltage Vdo: 240mV
• No. Of Pins: 5
• Output Current: 1.5A
• Operating Temperature Range: -40°C To +125°C
• Termination Type: SMD
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HEATSINKING TO-263 PACKAGE
The TO-263 package uses the copper plane on the PCB as
a heatsink. The tab of these packages are soldered to the
copper plane for heat sinking.
θ
a typical PCB with 1 ounce copper and no solder mask over
the copper area for heat sinking.
As shown in the figure, increasing the copper area beyond 1
square inch produces very little improvement. The minimum
JA
FIGURE 5. θ
of TO-263 package for different copper area sizes, using
JA
vs Copper (1 Ounce) Area for TO-263
package
Figure 5
shows a curve for the
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15
value for θ
32°C/W.
Figure 6
TO-263 packages for different ambient temperatures, assum-
ing θ
125°C.
FIGURE 6. Maximum power dissipation vs ambient
JA
is 35°C/W and the maximum junction temperature is
shows the maximum allowable power dissipation for
JA
temperature for TO-263 package
for the TO-263 package mounted to a PCB is
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