Hi,
Yes, it can be used working as inverting buck-boost. For the specific design process, you can refer to the two ANs in the attachment. Hope this can help you. Thanks.
Create an Inverting Power Supply Using Peak Current Mode Buck Converter.pdf …
Hello
I think that device should be OK.
Please see the attached application note for help with an inverting design.
You may be able to use the SPICE model to test; as shown in the application note.
Also, you could test it out on the EVM.
Thanks…
Hi,John
I am sorry.
The Application Reports are attached here Working with inverting buck-boost converters.pdf . Using the TPS54335A to Create an Inverting Power Supply.pdf
Hi, Thank you for your reply ! Nice, note that the controller I tested is the LMR36006AQRNXTQ1 soldered on the LMR33630CRNXEVM eval board. Moreover, the inductor value of 33uH has been chosen to avoid getting too "early into the PFM mode. The actual power…
Hello
Yes you can try to parallel a ceramic with the tantalum.
You may also want some capacitance at the node VCC_3P3_SOM
Also, check the self-resonant frequency of your inductor. Try to choose an inductor with a
high self-resonant frequency,…
Hello
I have attached some app notes that may be of some help.
If you use the same switching frequency as in the app note that you found, then you could use the same inductor and adjust the feedback divider
for -15Vout.
However, the compensation…
Hello
To help mitigate certain EMI issues the following may be helpful:
1. A small resistor in series with the BOOT cap may help. The maximum value should be 10Ω.
2. A snubber from the SW node to GND may also help. These components should be placed…
Hello
Yes you can use the LM43602 for an IBB. I would use the values for the LM43601 as a starting point for LM43602.
Also, your can use the inverting/non-inverting Spice model to help verify your design LM43602.
Please have a look at the attached…
Hello
It may be that an input voltage of 5V is too small for this device to boost up to -15V.
Can you test with an input voltage of 12V.
Try removing R98.
Please send waveforms of the switch node and output during bad and good behavior and during…
You can convert a positive 15V to a negative 15V with a buck converter. That should work.
I have attached two app notes that show how to connect the converter to get a negative 15Vout.
5287.snva856.pdf
1447.snva722b.pdf
