1 Introduction

The TPS563219A is a single, adaptive on-time, D-CAP2™ mode, synchronous buck converter requiring a very low external component count. The D-CAP2 control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The slow start time is externally programmable and there is a dedicated Power Good (PG) pin to aid in voltage monitoring and sequencing. The switching frequency is internally set at a nominal 650 kHz. The high-side and low-side switching MOSFETs are incorporated inside the TPS563219A package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS563219A to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS563219A dc/dc synchronous converter is designed to provide up to a 3-A output from an input voltage source of 4.5 V to 17 V. The output voltage range is from 0.8 V to 6.5 V. Rated input voltage and output current ranges for the evaluation module are given in Table 1-1.

The TPS563219AEVM-663 evaluation module (EVM) is a single, synchronous buck converter providing 1.05 V at 3 A from 4.5-V to 17-V input. This user’s guide describes the TPS563219AEVM-663 performance.