System and method for a switch transistor driver

A method of driving a switching transistor, the method comprising:

• receiving an activation signal for the switching transistor;
• generating a sequence of random values;
• adjusting a driver circuit according to a random value of the sequence of random values;
• and
• upon receipt of the activation signal, driving a control node of the switching transistor with a drive strength based on the random value of the sequence of random values, wherein
• driving the control node of the switching transistor comprises driving the control node of the switching transistor with the driver circuit,
• adjusting the driver circuit comprises adjusting an output voltage of the driver circuit according to the random value of the sequence of random values, and
• adjusting the output voltage comprises applying the random value to an input of a digital-to-analog converter and coupling an output of the digital-to-analog converter to the control node of the switching transistor.

An integrated circuit comprising:

• a pseudo-random sequence generator;
• a plurality of output drivers configured to be coupled to an external switch transistor;
• and
• a logic circuit having inputs coupled to an output of the pseudo-random sequence generator and outputs coupled to the plurality of output drivers, the logic circuit configured to activate a subset of the plurality of output drivers based on an output of the pseudo-random sequence generator upon receipt of an activation signal to modulate a steepness of a switching slope at a control node of the external switch transistor on a cycle by cycle basis.