TLS710B0

Application Information

Data Sheet

16

Rev. 1.0, 2015-03-12

In case of rapid transients of input voltage or load current, the capacitance should be dimensioned in accordance

and verified in the real application that the output stability requirements are fulfilled.

6.3

Thermal Considerations

Knowing the input voltage, the output voltage and the load profile of the application, the total power dissipation

can be calculated:

P

(1)

with

•

P

•

V

•

V

•

I

•

I

The maximum acceptable thermal resistance

R

R

(2)

with

•

T

•

T

Based on the above calculation the proper PCB type and the necessary heat sink area can be determined with

reference to the specification in “Thermal Resistance” on Page 6.

Example

Application conditions:

V

V

I

T

Calculation of

R

P

(

V

= (13.5 V – 5 V) × 100 mA

= 0.85 W

R

= (150 °C – 85 °C) / 0.85 W = 76.47 K/W

As a result, the PCB design must ensure a thermal resistance

R

can be used.