2019 年 16 巻 13 号 p. 20190244
Buck converter is widely used in the aerospace field. However, radiation in the aerospace environment will result in degradation or failure of devices and circuits. This paper presents a radiation-hard Buck, which is an adaptive on-time Buck. A radiation-hard adaptive on-time generator is proposed by utilizing of leakage current compensation. The proposed radiation-hard adaptive on-time generator is composed of an adaptive on-time timing block and a charging current generator. Finally, the proposed Buck is fabricated in a standard 0.18 µm BCD process. And the radiation tests show that the Buck still maintains stability after total ionizing dose irradiation at a total dose of 350 Krad (Si).