Adaptive Loop Gain Linear Regulator for Stable Fast Load Response

The patent implements dynamic loop gain adjustment by detecting load current variations and automatically modifying the loop gain accordingly. When load current increases, the loop gain is increased to improve transient response; when load current decreases, the loop gain is reduced to maintain loop stability. This dynamic adaptation resolves the contradiction between transient response and loop stability across varying operating conditions.

The system dynamically adjusts loop gain based on real-time load current detection. Under light load conditions, the loop gain is decreased to ensure adequate loop stability and phase margin. Under heavy load conditions, the loop gain is increased to maintain fast transient response. This dynamic adjustment strategy resolves the contradiction by adapting the loop gain to actual operating conditions.

The patent employs feedback mechanisms where the load current is detected and fed back to the loop gain control circuit. This feedback loop enables automatic adjustment of the loop gain according to the actual load conditions, improving adaptability without requiring complex manual configuration or multiple fixed-gain circuits. The feedback-based approach balances circuit simplicity with performance adaptability.

Instead of changing the dominant pole position, the patent changes the loop gain parameter to achieve both improved transient response and maintained loop stability. By adjusting the loop gain dynamically based on load current, the system achieves fast transient response under heavy load while maintaining adequate phase margin and stability under light load, without the need to relocate the dominant pole which would compromise stability.