This role involves Architectural design and optimization of power silicon control systems. The optimization includes small signal and large signal analysis, modeling and prototyping of advanced power conversion topologies such as buck, boost and buck-boost. Major performance characteristics include efficiency, load step response, mode and state transitions, phase shedding/adding, open and closed loop frequency response and EMI mitigation. The control loops may be analog, digital, or mixed signal. Applications for these power circuits include PMIC multi-phase bucks, boosts and buck-boosts, battery chargers (linear, switching, wireless), battery management circuits and WLED backlight controllers. Collaborate with cross-functional teams to develop world-class power solutions for a diverse set of Apple platforms.
Core Responsibilities: •Evaluate & specify optimum design for DC/DC conversion (linear & switched) •System-level architecture (Power-State with Dynamic Voltage a Frequency Management along with multi-supply power sequencing) for power conversion in the mobile design space •Forward-looking solutions for power conversion that optimize efficiency, regulation and total solution area/volume (inclusive of the regulator electronics, inductors and capacitors) •Working with internal teams to specify passives (magnetics and capacitors)
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