Hi Community.
I have soldered schematic with the TPS62143 as Voltageregulator. I selected the components according to the WebBench Design Report. The partnumbers are not the same because my distributor did not sell them but the parameters are the required one. I used this coil.
The input voltage range is 6V - 15V, output voltage = 5V and my schematic needs about 200mA.
The Problem is, that the output voltage drops down to about 3,4V if the input voltage exceeds about 10V.
At first, I thought that the Switcher is damaged and changed it. But the second one has the same behavior.
I have also a seconds (another board) with this switcher and nearly the same desgin with the same parts and this one works very fine.
Can anyone help me to find out why the voltage drop happens?
Here is the design: