LM2940S-12 National Semiconductor, LM2940S-12 Datasheet - Page 15

• Manufacturer Part Number: LM2940S-12
• Description: IC, LDO VOLT REG, 12V, 1A, TO-263
• Manufacturer: National Semiconductor

Specifications of LM2940S-12

• Primary Input Voltage: 26V
• Output Voltage Fixed: 12V
• Dropout Voltage Vdo: 500mV
• No. Of Pins: 3
• Output Current: 1A
• Operating Temperature Range: -40°C To +125°C
• Termination Type: SMD
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

HEATSINKING LLP PACKAGE PARTS
The value of θ
for the LLP package is specifically dependent
JA
on PCB trace area, trace material, and the number of layers
and thermal vias. It is recommended that a minimum of 6
thermal vias be placed under the center pad to improve ther-
mal performance.
For techniques for improving the thermal resistance and pow-
er dissipation for the LLP package, please refer to Application
Note AN-1187.
882241
FIGURE 6. Maximum Power Dissipation vs. T
for the
A
SOT-223 Package
15
www.national.com