1 Introduction

The TPS56C20 is a synchronous DC-DC converter. The TPS56C20 is a buck converter whose output voltage can be adjusted using the feedback resistor divider network or using VID commands from an I2C interface bus. It is a single, adaptive on-time, D-CAP2™ mode converter requiring a very low external component count. The D-CAP2 control circuit is optimized for low-ESR output capacitors such as POSCAP or SP-CAP, or ceramic types. The D-CAP2 control circuit features fast transient response with no external compensation. The reference design internally sets the switching frequency at a nominal 500 kHz. The design integrates the high- and low-side switching MOSFETs and the gate drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS56C20 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS56C20 DC/DC synchronous converter provides up to a 12-A output from an input voltage source of 4.5 V to 17 V. The output voltage range is from 0.6 V to 1.87 V. The rated input voltage and output current range for the evaluation module are given in Table 1-1.

The TPS56C20EVM-614 evaluation module is a single, synchronous buck converter providing 1.1 V at 12 A from 4.5-V to 17-V input.