High-Efficiency DC–DC Converter with Charge-Recycling Gate-Voltage Swing Control

Abstract

This paper proposes a high-efficiency DC–DC converter with charge-recycling gate-voltage swing control with a light load. By achieving a variable gate-voltage swing in a very efficient manner by charge recycling, the power efficiency has been substantially improved due to the lower power consumption and the achieved balance between the switching and conduction losses. A test chip was fabricated using 65-nm CMOS technology. The proposed design reduces the gate-driving loss by up to 87.7% and 47.2% compared to the conventional full-swing and low-swing designs, respectively. The maximum power conversion efficiency was 90.3% when the input and output voltages are 3.3 V and 1.8 V, respectively.

An Analysis of Non-Isolated DC-DC Converter Topologies with Energy Transfer Media

“…For the CBK, I L is always the same as I LOAD [3,4,[13][14][15][16]. In contrast, for the proposed BKETM, I L is I LOAD divided by (1 + D).…”

“…Therefore, neither linear regulators nor SC converters are good candidates for powering high performance loading blocks that require a large I LOAD . On the other hand, a SI converter with an external inductor is an efficient solution in heavy load conditions [13][14][15][16]. Buck, boost, and buck-boost SI converters exist for generating lower, higher, and lower or higher output voltage (V O ), respectively, compared with the battery voltage (V IN ).…”