2.5 A, Dual Mode, Wide Efficiency Band, Hysteretic Buck Controller for Automotive Applications
Florin Dumitru, Bogdan Dimitriu, Gheorghe Brezeanu · 2024
This paper presents a dual mode hysteretic Buck converter with high efficiency (>80%) over a wide load current range (10mA÷2A). The regulation loop is simple and employs a digital Asynchronous Finite State Machine (AFSM) for implementing the output regulation algorithm. The proposed solution is implemented and simulated in Infineon's automotive grade technology. A comparative study is conducted showing that the proposed converter offers a maximum efficiency improvement of more than 30% at light load currents (10mA). Also, the circuit was characterized by simulations considering the strict automotive requirements, temperature range (−40 ÷150) °C and considering also process variations.