Hi Ben,
A buck converter in an inverting buck-boost topology can be made by following this reference design: TIDA-01405 , different buck converters can be used in place of the one given in the reference design.
The least time consuming design should be…
Hi Jesse,
No, this is not allowed since the voltage across the IC would be 6.8V and this exceeds its ratings.
The TPS63710 is a perfect device for those requirements, if very low noise is needed by the load. If smaller size is desired, we have this reference…
Part Number: TPS82140 Other Parts Discussed in Thread: TIDA-01405 , , TPS82130 , TPS63710 Tool/software: WEBENCH® Design Tools Dear Sir/Madam,
I am using TIDA-01405 Design as reference.
Part Number : TPS82140 Input = 5v Output = -1.7v
What will be the max…
Hi Di,
For most applications with your parameters, a simple and small inverting charge pump like LM27761 is a good solution. If you need more power, you need to use an inductive solution like in this reference design: www.ti.com/.../TIDA-01405
Based…
Hi Chris
Thank you for your reply.
TIDA-01405 would be good solution.
And please tell us SLVA317B additionally.
Is it possible to meet our requirement if we use other device which has higher switch current? (Such as TPS54531)
Because ordinary DCDC…
Ah, TPS63710 cannot be used here anyways due to its 70% duty cycle limit.
LM27761 gives almost enough current for the -2.25V case. Otherwise, you need an inverting buck-boost like in this design: www.ti.com/.../TIDA-01405
Hi Sakai-san,
Yes, TPS63700 is an inverting buck-boost converter that can operate under your Vin, Vout, and Iout.
But it is an older and larger device. I would rather recommend the much smaller TPS82130 module, in a design like these:
www.ti.com/.…
Are you powering an RF data converter? This TIDA can likely also be used: www.ti.com/.../tida-01405
I don't think paralleling these ICs makes too much sense, as they contain both a charge pump and LDO. If you need to use an LDO, use a bigger inverting…
I would suggest using the TPS82130 to go from 12V to ~5.5V and ~3V, then use LDOs to get to 5V and 2.5V. You can get 3.3V from 5V with another LDO.
You can use 2 more TPS82130s to get the -5.5V from the 5.5V rail and the -3V from the 12V rail, per this…