This document describes a power supply reference board designed for powering digital applications, such as CPUs, FPGAs, memories, etc. The main purpose of the board is to illustrate the basic principles used for the design of the power supply and to give designers a usable prototype for testing and use. The document also discusses the trend in recent years in the supplying of power to MCUs, CPUs, memories, FPGAs, etc., and the need for different voltage levels for different devices in one platform.
The AN2559 application note presents the STEVAL‑PSQ001V1 system power‑supply board, a reference design for powering digital applications such as CPUs, FPGAs and memories. It details the board architecture, including four DC‑DC converters, two linear regulators and a reset circuit, and provides design guidelines for industrial‑grade input voltages up to 36 V.
The document includes main characteristics, schematics, PCB layout, bill of materials and measurement results, helping designers evaluate performance, efficiency and transient response of the board.
| Input voltage range | 5 V – 36 V DC, surge protection |
|---|---|
| Vcore selectable output voltages | 0.9 V, 1.0 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V |
| Vcore current capability | 4 A continuous, 6 A peak |
| Vio selectable output voltages | 1.0 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V or 3.3 V |
| Vio current capability | 2 A continuous, 3 A peak |
| Number of DC‑DC converters | Four |
It describes a power‑supply reference board designed for powering digital applications such as CPUs, FPGAs and memories.
The board accepts an input voltage from 5 V up to 36 V DC and includes surge protection.
The board contains four DC‑DC converters.
Vcore can be set to 0.9 V, 1.0 V, 1.2 V, 1.5 V, 1.8 V or 2.5 V.