Hi Nishizawa-san,
With 5Vin, you will not get -5Vout. It will be lower by the output impedance and LDO dropout.
Many applications do not need -5.0Vout. If you do, you need to use an inverting buck-boost converter circuit such as this reference design…
Hello,
TPS63710 has a 70% maximum duty cycle, that's why webench cannot simulate your system.
Many applications do not need -5.0Vout. If you do, you need to use an inverting buck-boost converter circuit such as this reference design:
http://www.ti…
Hi Anand,
Unfortunately we have no software which can support this.
This can be replicated easily on the TPS62125-EVM, we have a blog explain how to modify a step down converter to an inverting buck boost topology:
https://e2e.ti.com/blogs_/b/powerhouse…
For a -5Vout inverting boost function, please see these reference designs:
http://www.ti.com/tool/PMP9760 (lower current discrete)
www.ti.com/.../TIDA-01457 (higher current module)
Hi Eli,
For a constant -7V, I recommend boosting to ~5V with the TPS61099, then using the TPS62125 to get -7V per this reference design: http://www.ti.com/tool/PMP9760
Thanks for explaining. Is the anode powered from another voltage or from GND?
Here are 2 TI reference designs, which further explain these types of solutions. You might take a look at the lower power and lower input voltage TPS62120/2.
http://www.ti…