This application note discusses the voltage regulators/switchers that are suitable for those processors running at 600 MHz. The TigerSHARC® processor requires three different supply voltages, the core voltage of 1.2 V, the internal DRAM voltage at 1.6 V, and the I/O voltage of 2.5 V. These three voltages are discussed in details in the following sections.
This document serves as a detailed guide for powering Tiger SHARC processors, specifically those operating at 600 MHz. It addresses the increasing power demands of these processors as silicon geometry shrinks and clock speeds increase. The guide outlines the necessary supply voltages for the core, internal DRAM, and I/O interfaces, emphasizing the need for efficient power management schemes.
| Core Voltage | 1.2 V |
|---|---|
| Internal DRAM Voltage | 1.6 V |
| I/O Voltage | 2.5 V |
| Switching Frequency | 600 kHz |
| Maximum Output Current (Core) | 12 A |
The processor requires three different supply voltages: 1.2 V for the core, 1.6 V for internal DRAM, and 2.5 V for I/O.
The ADP1821 is recommended for applications implementing two Tiger SHARC processors.
The design selects a switching frequency of 600 kHz to allow for smaller magnetic components.