A switched capacitor deadtime controller for DC-DC buck converter

In this paper, it introduces a proposed hybrid control system which can simultaneously optimize deadtime and reverse inductor current with both the proposed Switched Capacitor Delay Deadtime Controller (SCD-DTC) and Unbalanced Input Pair Zero Current Detector (UIP-ZCD). Furthermore, the total silicon chip area of the hybrid control system occupies an area of 1.44mm2. The estimated power efficiency is 95.8% which has taken into account of losses due to wire bonding, package leads, PCB traces and other parasitic effects. The VIN_BUCK is 2.8-3.3V and being regulated to a VOUT value of 1.8V while driving 5-30mA of load current. The proposed SCD-DTC implemented in the buck converter minimizes the duration of body diode conduction to be <; 0.1ns.

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