TPS650250: TPS650250 & TPS62441-Q1

Hi Ismail, 

Thank you for reaching out on E2E! Could you clarify a few things for me, are you looking for a replacement for TPS650250? 
What are the current requirements for each rail? Do they all need to be bucks, or are LDOs acceptable?

TPS65910 and TPS65911 devices include an internal RTC.

TPS659118 has a preprogrammed sequence for 3.3 V (Buck) → 1.8V (Buck) → 0.9 V (LDO). More information can be found in this User Guide. 

One thing to note, our devices are able to control power up sequence of the output rails without a dedicated RTC oscillator, if this is the sole purpose. 

Custom sequence and voltage requirements can be programmed to user-programmable device TPS6521905 . 
TPS6521905 can be shutdown by the SoC via the RESET/EN pin inputs. 

Let us know if you have further questions or comments.

Best Regards, 
Sarah

Hello Sarah,

FYKI, we are looking for  the right solution for my application, I'd like to schedule a meeting to discuss it in detail. Your last response was helpful, but I need more specific application-related information. Would you be available for a discussion?

Thanks

Ismail P

Hello Mr. Sathish,

The above part code TPS650250 application note is not providing enough information to conclude. I felt there is a small gap in understanding our application.

Let me Rephrase it: PMIC used to Power down our Mindgrove Application board wrt the enable signal (1.8V) received from the Mindgrove Soc.

For  power-up the Mindgrove Application Board in 2 modes. ( both modes implemented in simultaneously)

* Auto Mode: Once Mindgrove App board needs to wake up after a power down event, using either a RTC or timer to control the wake up time

Example sequence: Application Board--> Power Down Signal from SoC--> PMIC disable the rails--> Interrupt generate from RTC ( In-build with PMIC)--> PMIC enable the rails.

*Bypass Mode: When Mindgrove App board is power Down, it need to Power up (wake-up ) the board wrt the External switches (ex: Touch display or Push button)

Sequence: Application Board--> Power Down Signal from SoC --> PMIC disable the rails--> Interrupt generate from  Push button ( external one)--> PMIC enable the rails.

Thanks,

Ismail P

ismail@mindgrovetech.in

Mindgrove technologies

Hi Ismail,

TPS650250 provides individual enable pins for 3 converters and a combined separate input for LDOs. I don't see an option for auto power up after a power down event.

TPS6521905 (user programmable version) can be configured in push button mode and when RESET pin is configured in COLD RESET it can power down all the rails and power up automatically but there is no option for programmable time between power down and power on.

Sathish

Hello Sathish,
Could you suggest alternative PMIC partcode to meet our needs?. We are looking for the PMIC  that incorporates the following feature of Auto power up after a Power down event.

Thanks,

Ismail P

Hi Ismail,

i am checking with our team but not sure if we have adjustable wake time PMICs.

Hello Sathish,

Please discuss with your team internally and propose a solution that best fits our use case. If that’s not feasible, kindly recommend an alternative approach to fulfill our requirements.

Thanks in advance

Ismail P

Thanks Sathish, I raised the New support request. let me check with device expert and get back to you later for conveying my sincere thanks.

Ismail P

Thank you Ismail.