SLDA059 February   2022 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , 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

PMIC Selection Guide

Table 4-1 details a selection guide for powering the AM64x or AM243x. The PMIC solution choice will depend on the desired power configuration, memory support, and peripherals support such as Ethernet PHY. The recommended discrete regulators to implement these supports are also listed. The next section provides example power maps for each PMIC solution, and also highlights additional design considerations such as solution size and cost.

Table 4-1 AM64x and AM243x PMIC Solution Selection Guide
AM64x Single-PMIC SolutionAM64x Dual-PMIC SolutionAM243x (ALX Package) PMIC SolutionAM243x (ALV Package) PMIC Solution
PMICLP873364[3]LP873364 + TPS6521855[4]LP87334D[5]
Memory SupportLPDDR4 or DDR4LPDDR4 or DDR4NoNoLPDDR4 or DDR4
Recommended Discrete RegulatorsTPS745, TPS62822TPS745NoTPS62822 or TPS745 (for 1.1 V or 2.5 V Ethernet PHY support)TPS62822, TPS745
PMIC Package Size5 mm x 5 mm5 mm x 5 mm + 6 mm x 6 mm5 mm x 5 mm5 mm x 5 mm5 mm x 5 mm
Example Power MapFigure 5-1

(with LPDDR4)

Figure 5-2 (with DDR4)

Figure 5-3

(with LPDDR4)

Figure 5-4(with DDR4)

Figure 5-5Figure 5-6Figure 5-7

(with LPDDR4)

Figure 5-8(With DDR4)

Available TI design resourcesLP87334D Technical Reference ManualLP87334D Technical Reference ManualLP87334D Technical Reference Manual

[3] LP87334D is a viable alternate power solution if choosing to power VDD_CORE with under 0.85 V.

[4] The DIY PMIC TPS6521815 comes with all rails disabled, which is beneficial for allowing placement of the PMIC in the system without damaging the SoC during power up. The TPS6521815 can then be programed to the TPS6521855 register settings.

[5] The DIY PMIC TPS6521815 can be used in place of LP87334D to fully customize the power solution, however it may provide more regulators than needed for the processor.