SLVAFW3B March   2025  – October 2025 AM62L , TPS65214

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Power Management IC (PMIC) Overview
  6. 3Low Power Modes and Power Supply Optimization
    1. 3.1 PDN#1: Optimized Power Design for BOM Size and Cost
    2. 3.2 PDN#2: Optimized Power Design for Lowest Suspend Power
    3. 3.3 PDN#3: Fully Flexible Power Design
    4. 3.4 PDN#4: Power Supply Implementation for DDR4
  7. 4Power-Up Sequence
  8. 5Power-Down Sequence
  9. 6Summary
  10. 7References
  11.   A Appendix A: Discrete Power Implementation for PDN#1
  12.   B Revision History

3 Low Power Modes and Power Supply Optimization

The AM62L offers the following low power modes: RTC only, RTC + IO + DDR, DeepSleep and Standby. Refer to the Power section of the AM62L Technical Reference Manual for a detailed description of each low power mode and the supported wakeup sources. At a high level, during RTC only the RTC rails (VDDS_RTC / VDD_RTC) stay ON and the remaining power rails are turned-off. During RTC + IO + DDR the main CORE (VDD_CORE) and the 1.8V analog (VDDA) are turned-off while the remaining rails stay-ON. In contrast, when supporting DeepSleep and Standby all the external power rails stay ON. Table 3-1 shows three PDNs for different power optimization to power AM62L+LPDDR4 based on the required low power modes. This table also includes a PDN for a supply implementation with DDR4.

For applications not using low power modes: PDN#1 is recommended if the total 3.3V IO current is lower than 500mA. If total 3.3V IO current is higher than 500mA, PDN#2 is recommended.

Table 3-1 AM62L Power Delivery Network (PDN)
Power Supply Optimization Memory Supported Low Power Modes
RTC only RTC + IO + DDR DeepSleep Standby
Lowest BOM size, cost (PDN#1) (1) LPDDR4 ✓ ✓
Lowest Suspend Power (PDN#2)(2) LPDDR4 ✓ ✓ ✓
Fully Flexible Design (PDN#3)(2) LPDDR4 ✓ ✓ ✓ ✓
Supply diagram for DDR4 (PDN#4)(3) DDR4 ✓ ✓ ✓ ✓
(1) PDN#1 uses a custom PMIC configuration that is available upon request for high volume applications.
(2) PDN#2 and PDN#3 use the TPS6521401 PMIC configuration.
(3) PDN#4 uses the TPS6521402 PMIC configuration.