Anatomy of peak current mode control in a monolithic dc/dc converter

Monolithic dc/dc converters provide a small solution size for the power management industry by integrating power switches with pulse width modulation (PWM) controllers. On the other hand, partial or all key control loop design parameters are hidden inside a black box. A practical way to identify the values of those parameters not only provides an effective tool for a system designer to retrieve information from an unknown converter, but also gives an insight of the control loop design of a monolithic dc/dc converter. This paper proposes a procedure of identifying the key parameters in a peak current mode control monolithic converter as well as an insight of debugging a monolithic dc/dc converter.