1 Introduction
In light-load conditions, the TPS563203 operates in Eco-mode to enable higher efficiency by varying its
switching frequency, the TPS563206 operates in FCCM to maintain constant switching frequency. The main
difference is at light loading, but the other behaviors are similar. This user's guide mainly introduces the
TPS563203 and includes some TPS563206 features that are different from the TPS563203.
The TPS56320x is a single, adaptive on-time, D-CAP3™ control mode, synchronous buck converter that requires
a very low external component count. The D-CAP3 control mode 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 switching frequency is internally set at a nominal 600KHz. The high-side and low-side
switching MOSFETs are incorporated inside the TPS56320x package along with the gate-drive circuitry. The low
drain-to-source on resistance of the MOSFETs and fast switching slew rate allow the TPS56320x to achieve
high efficiency and help keep the junction temperature low at high output currents. The TPS56320x DC/DC
synchronous converter is designed to support up to a 3-A continuous current from an input voltage source of 4.2
V to 17 V. The output voltage range is from 0.6 V to 7 V. Rated input voltage and output current ranges for the
evaluation module are given in Table 1-1.
The TPS56320xEVM evaluation module (EVM) is a single, synchronous buck converter providing 1.05 V at 3 A
from 4.2-V to 17-V input. This user’s guide describes the TPS56320xEVM performance.
Table 1-1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE (VIN) RANGE OUTPUT CURRENT (IOUT)
RANGE
TPS563203EVM VIN = 4.2 V to 17 V 0 A to 3 A
TPS563206EVM VIN = 4.2 V to 17 V 0 A to 3 A
2 Performance Specification Summary
A summary of the TPS563203EVM performance specifications is provided in Table 2-1. Specifications are given
for an input voltage of VIN = 12 V and an output voltage of 1.05 V, unless otherwise noted. The ambient
temperature is 25°C for all measurement, unless otherwise noted.
Table 2-1. Performance Specifications Summary
SPECIFICATIONS TEST CONDITIONS MIN TYP MAX UNIT
Input voltage range 4.2 12 17 V
Output voltage set point 1.05 V
Operating frequency VIN = 12 V, IO = 3 A 600 KHz
Output current range 0 3 A
Over current limit VIN = 12 V, LO = 2.2 µH 3.9 A
Output ripple voltage VIN = 12 V, IO = 3 A 11 mVPP
Introduction www.ti.com
2TPS563203 and TPS563206 Step-Down Converter Evaluation Module User's
Guide
SLUUCQ4 – FEBRUARY 2023
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