Data Sheet

15

Rev. 1.0 2015-11-02

TLS810B1LDV50

Application Information

6.2.2

Output Pin

An output capacitor is mandatory for the stability of linear voltage regulators.

The requirement to the output capacitor is given in “Functional Range” on Page 8. The graph “Output

Capacitor Series Resistor ESR(CQ) versus Output Current IQ” on Page 14 shows the stable operation range

of the device.

TLS810B1 is designed to be stable with extremely low ESR capacitors. According to the automotive

environment, ceramic capacitors with X5R or X7R dielectrics are recommended.

The output capacitor should be placed as close as possible to the regulator’s output and GND pins and on the

same side of the PCB as the regulator itself.

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:

(6.1)

with

(6.2)

with

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 9.

Example

Application conditions:

–

() I

Q

×

+

×

=

,

,

–

----------------------------

=