In my application, I need -5v for OP-AMP application. Load on -5V is 200mA.
I have come across various possible ways, as follows:
We are using TPS5430 in our system, so to avoid new inventory, we will prefer this option.
2) Using negative clamper circuit as described Stack Exchange Query Here, I observed -5V was regulating randomly. I tried with different c33 values (0.1uf,4.4nf), but sometimes it worked fine, but not always. Even after connecting dummy load at 7.5V output as per suggestion on that query, regulation was random.
Can someone tell me, 1st option which I listed above,is it safe for regulation(-5V)?
I am concerned because TPS5430 is buck regulator, not buck-boost?
And also, when similar buck (LM2576) used as inverting buck boost it stated in datasheet that it draws more current at input.
Is this applicable to TPS5430 also ( in datasheet of TPS5430, it's not mentioned that it will draw more input current as LM2576, I am concerned because my input current has limitation to source high current since there are many peripherals)
Other than this, is there convenient option to generate -5v?
Thank you in advance.