1 Introduction

The TPS65220 PMIC is a cost and space optimized solution specially designed to power the AM64x processor and its principal peripherals. A hardware solution is readily available with the AM64x SK EVM Revision 2 using TPS65220 PMIC (SK-AM64B). In addition, functional spin TPS65219 PMIC has flexible mapping and comes in several factory programmed variants to support different AM64x use cases. The AM64x is within the Sitara™ family of Arm® processors, and provides highly flexible, real-time, and low latency processing for a broad range of industrial applications. To be used in applications from motor drives to Programmable Logic Controllers (PLCs), this processor provides powerful computing while supporting power management features designed for portable or power-sensitive systems. Powering a processor such as the AM64x family demands requirements such as sufficient current headroom, tight transient requirements, and a number of rails that can be fully controlled for power up and power down sequencing.

The AM64x processor requires at minimum, power for seven main rails. These include the core supply rails (VDD_CORE and VDDR_CORE), DDR IO supply (VDDS_DDR), and 1.8 V and 3.3 V digital and analog IO rails (VDDSHVx, VDDSHV_MCU, VDDSHVy, VDDA_MCU). This application note discusses the TPS65220 and TPS65219 power management IC (PMIC) and their full feature-set, specially designed to power the AM64 Sitara^TM processor and its principal peripherals.