LP3856ESX-1.8/NOPB National Semiconductor, LP3856ESX-1.8/NOPB Datasheet - Page 15

• Manufacturer Part Number: LP3856ESX-1.8/NOPB
• Description: IC REG LDO 3A 1.8V TO-263-5
• Manufacturer: National Semiconductor

Specifications of LP3856ESX-1.8/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: 2.5 ~ 7 V
• Number Of Regulators: 1
• Current - Output: 3A (Max)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-5, D²Pak (5 leads + Tab), TO-263BA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Other names: LP3856ESX-1.8

As shown in the figure, increasing the copper area beyond 1
square inch produces very little improvement. The minimum
value for θ
32°C/W.
FIGURE 5. θ
JA
for the TO-263 package mounted to a PCB is
JA
vs Copper (1 Ounce) Area for TO-263
package
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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
temperature for TO-263 package
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