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TPS65217: Replacement of TPS65217 (PMIC Battery-Powered Systems) for AM2434

RAJASREE RAJASEKHARAN
Prodigy 56 points
Part Number: TPS65217
Other Parts Discussed in Thread: AM2434, , TPS65218, TPS65070, TPS65219, BQ24072, BQ25898

Tool/software:

We are currently developing a battery-powered embedded system based on the TI AM2434 microcontroller. Initially, we chose the LTC3566-2 as the power management IC (PMIC) due to its integrated battery charger, LDO, and buck-boost converter. However, we’ve encountered limitations with the LTC3566-2 — specifically, it cannot supply sufficient load current required by the AM2434 and associated peripherals.

We are now exploring a replacement PMIC that is better suited for the AM2434’s power demands. Ideally, we are looking for a device with the following features:

  • Multiple regulated power rails (for core, I/O, and peripherals)

  • Proper power-up/power-down sequencing

  • Support for Li-Ion battery charging

  • High integration to minimize board space

  • Support for low-power modes (suitable for power-sensitive applications)

  • Compatibility with USB input power (optional but preferred)

We came across the TPS65217x family, which is commonly used with SitaraTm AM335x processors, and we're considering something similar for our application. However, we’re not sure if it's fully compatible with the power requirements and sequencing needs of the AM243x series.

Has anyone successfully used a PMIC with the AM2434 (or similar AM243x devices)? We would appreciate any recommendations, reference designs, or insights into suitable PMICs that are proven to work well in battery-powered applications with the AM2434.

Thanks in advance for your help!

  • 0
    TI__Genius 9187 points

    Hello Rajasree, 

    Thank you for your interest in using TI PMICs!

    As you mentioned, the TPS65217x family was designed specifically with pairing with AM335x in mind.
    And as such, the pre-programmed default values are not fit to the AM2434 requirements.
    But the default voltages and sequence can be changed via I2C control.

    Unfortunately we do not have any reference designs or references that demonstrate TPS65217 pairing with AM2434.

    We do have some alternate PMIC solutions with design resources for AM243x:

    TPS65218x + LP8733 for AM243x

    • Powers core, I/O, peripherals, with memory support
    • Optional Backup Battery support from coin cell battery
    • TPS65218x can support external battery charger for battery-powered applications

    TPS65219 with AM243x

    • Powers core, I/O, peripherals, with memory support
    • Cost and space optimized
    • No built-in battery support

    Please feel free to take a look over the options above and let me know if you have any further questions!

    Best Regards,
    Sarah

  • 0 in reply to Sarah Lao
    Prodigy 56 points

    Hi Sarah,

    Thank you for your response and the helpful suggestions regarding PMIC options for the AM243x.

    We would like to highlight that our application requires lithium-ion battery support as part of the battery management system. Specifically, we need the PMIC to be capable of charging the battery directly.

    From your suggestions, it seems the TPS65218x offers support for external battery chargers in battery-powered applications. Could you please confirm whether it can support charging a lithium-ion battery directly, or if an additional charger IC is required alongside the PMIC?

    Additionally, if there are any TI reference designs or documentation that demonstrate lithium-ion battery charging with TPS65218x (or another recommended PMIC), we would appreciate it if you could share them.

    Looking forward to your guidance.

    Best regards,
    Rajasree

  • 0 in reply to RAJASREE RAJASEKHARAN
    TI__Genius 9187 points

    Hi Rajasree, 

    The TPS65218 itself cannot support charging, it would require an additional charger IC.

    Typically I have seen BQ258798 be paired with TPS65218 to support the charging, but we do not have any reference designs with this implementation. 

    For PMICs that specifically have the charging capabilities, we have limited options in our portfolio:

    • TPS65217 (that you previously considered)
    • TPS65070
      • Fixed output LDOs, adjustable Bucks
      • Linear Battery Charger with Power Path

    Best Regards, 
    Sarah 

  • 0 in reply to Sarah Lao
    Prodigy 56 points

    Thank you for the clarification.

    I looked into the BQ258798, but I wasn’t able to locate this specific part on the TI website or in the product catalog. It might be a typo or an internal/reference-only part — if there’s an updated or correct part number, I’d appreciate it if you could share that.

    As for the TPS65070, after reviewing the datasheet, I noticed that it supports up to 1.2A output current, which unfortunately doesn't meet the requirements of my application. My design is based on the AM2434 microcontroller, along with additional peripherals, and requires a minimum system load current of 2A. Due to this limitation, TPS65070 won’t be suitable for our design.

    Could you kindly recommend any other TI PMICs that:

    • Are suitable for powering the AM2434 or similar Sitara-class SoCs,

    • Can handle at least 2A total load current, and

    • Either integrate battery charging or interface well with an external battery charger?

    I am currently considering using the TPS65219 in combination with the BQ24072 charger IC. This combination appears to meet both the load current and power path requirements for our system. However, I’m still in the process of finalizing the power architecture and would appreciate any further suggestions or validated reference designs you might recommend.

    Thanks again for your continued support!

  • 0 in reply to RAJASREE RAJASEKHARAN
    Prodigy 56 points

    Thank you for the clarification.

    I looked into the BQ258798, but I wasn’t able to locate this specific part on the TI website or in the product catalog. It might be a typo or an internal/reference-only part — if there’s an updated or correct part number, I’d appreciate it if you could share that.

    As for the TPS65070, after reviewing the datasheet, I noticed that it supports up to 1.2A output current, which unfortunately doesn't meet the requirements of my application. My design is based on the AM2434 microcontroller, along with additional peripherals, and requires a minimum system load current of 2A. Due to this limitation, TPS65070 won’t be suitable for our design.

    Could you kindly recommend any other TI PMICs that:

    • Are suitable for powering the AM2434 or similar Sitara-class SoCs,

    • Can handle at least 2A total load current, and

    • Either integrate battery charging or interface well with an external battery charger?

    I am currently considering using the TPS65219 in combination with the BQ24072 charger IC. This combination appears to meet both the load current and power path requirements for our system. However, I’m still in the process of finalizing the power architecture and would appreciate any further suggestions or validated reference designs you might recommend.

    Thanks again for your continued support!

  • 0 in reply to RAJASREE RAJASEKHARAN
    TI__Genius 9187 points

    Hi Rajasree, 

    Apologies, let me correct that part number, it should be BQ25898 .

    Looking at your requirements, I would say that TPS65219 is the best option we have in the TI PMIC portfolio. It can support 2A - 3.5 A on the bucks.  
    TPS65218x can only support up to 1.8 A.

    While TPS65219 does not have integrated battery charging, it can be battery-powered and used alongside an external battery charger. 

    Unfortunately, we do not have any existing reference designs for battery-powered applications for this PMIC, however the design guide linked earlier does provide a helpful start to how the PMIC can power the AM2434:

    Best Regards, 
    Sarah