1 Introduction

The TPS568231 is a single, D-CAP3™ control mode, synchronous buck converter requiring a very low external component count. The TPS568231 is a high-efficiency, cost effective, low quiescent current synchronous buck converter with integrated FETs. A mode pin is used to select output current limit, switching frequency, and forced continuous conduction mode (FCCM) and discontinuous conduction mode (DCM) operation. The device uses D-CAP3 control mode to provide a fast transient response, good line, load regulation, no requirement for external compensation, and supports low ESR output capacitors. Additionally, the TPS568231 provides adjustable soft start, undervoltage lockout inputs and a power-good output. Rated input voltage and output current ranges for the evaluation module are given in Table 1-1.

The TPS568231EVM evaluation module (EVM) is a single, synchronous buck converter providing 1.2 V at 8 A from 4.5-V to 17-V input. This user’s guide describes the TPS568231EVM performance.