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Total-dose and single-event effects in discrete switching DC/DC power converters are examined using a combination of circuit measurements and simulations. The total-dose experiments focus on the response of the power MOSFET used as the switching element for the converters. The efficiencies of two different types of converters (boost and buck) degrade with increasing total dose, leading to eventual functional failure. The single-event transient response of the converters is determined by the response of the feedback control circuitry. Radiation response is studied using both electrical measurements and simulation techniques, and issues affecting circuit failure are identified.
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Adell et al. (2002) studied this question.
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