Design of Buck Converter with Dead-time Control and Automatic Power-Down System for WSN Application

Abstract

A buck converter design with an automatic power-down technique and dead-time control system intended for low power application such as a wireless sensor network is proposed. With an input voltage range of 1V to 1.2V, the buck converter regulated the output voltage at 0.8V. This buck converter operates in a pulse-width modulation technique at load current range of 1mA-100mA. The output voltage ripple measured is 7.5 m V with the peak efficiency is 94.98 %. The quiescent current $(\mathrm{I}_{\mathrm{q}})$ of this proposed design is about $5\mu \mathrm{A}$. The line and load regulation is 0.195 mV/V and 0.61mV/mA, respectively. The circuit core layout dimension is $179 \mu\mathrm{m}$ and $120\mu \mathrm{m}$ 65nm CMOS technology.