7.1 Overview

The TPS566235 is high density synchronous Buck converter which operates from 4.5 V to 18 V input voltage (V_IN), and the output range is from 0.6 V to 7 V. It has 25-mΩ and 12-mΩ integrated MOSFETs that enable high efficiency up to 6 A. The proprietary D-CAP3™ mode enables low external component count, ease of design, optimization of the power design for cost, size and efficiency. The TPS566235 has ultra-low quiescent current (ULQ™) mode. This feature is beneficial for long battery life in system standby mode. The device employs D-CAP3™ mode control that provides fast transient response with no external compensation components. The control topology supports seamless transition between CCM mode at heavy load conditions and DCM operation at light load conditions. There are three operation modes can be configured by MODE pin at light load: Eco-Mode™, OOA and FCCM. Eco-Mode™ allows the TPS566235 to maintain high efficiency at light load. OOA mode makes switching frequency above audible frequency (25kHz), even there is no loading at output side. FCCM mode has the constant switching frequency at both light and heavy load. TPS566235 are able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.