SLDA059 February   2022 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6441 , AM6442 , LP8733 , TPS65218 , TPS6521815 , TPS6521855

 

  1.   Trademarks
  2. 1Introduction
  3. 2LP8733xx and TPS65218xx Device Overview
  4. 3LP8733xx and TPS65218xx PMIC Variants
  5. 4PMIC Selection Guide
  6. 5Example Power Maps
    1. 5.1 AM64x Single-PMIC Solution
    2. 5.2 AM64x Dual-PMIC Solution
    3. 5.3 AM243x (ALX Package) Single-PMIC Solution
    4. 5.4 AM243x (ALV Package) Single-PMIC Solution
  7. 6TPS6521815 Programming Information
  8. 7Conclusion

AM64x Single-PMIC Solution

An example power map using LP873364 for the AM64x with LPDDR4 memory support is shown in Figure 5-1, and with DDR4 memory support in Figure 5-2.

LP873364 has four rails and two configurable GPOs that can be used for sequencing. Therefore, the LP873364 solution consists of 1 PMIC + × discretes (depending on implementation of LPDDR4 or DDR4). This single-PMIC LP873364 solution is cost and size optimized compared to the AM64x dual-PMIC solution. The PCB area using the LP873364 solution with LPDDR4 memory support is about a 42% reduction in size as compared to the current AM64x SK EVM. This solution has also been extensively tested in the lab for power, sequencing, brownout, and fault conditions. Please refer to the Powering the AM64x with the LP8733xx PMIC application brief for in-depth information on implementing this solution.

Figure 5-1 Using LP873364 to Power AM64x with LPDDR4 Memory Support
Figure 5-2 Using LP873364 to Power AM64x with DDR4 Memory Support

Figure 5-2 provides an example power map using LP873364 for the AM64x with DDR4 memory support. A second TPS745 discrete LDO is enabled by LP873364 LDO0 to supply the DDR4 VPP rail.