Texas Instruments Incorporated
Load transient and jitter of DC-DC converter

Abstract:

A circuit includes an inductor that receives a switched input voltage to provide an output for driving a load. A driver circuit drives the switched input voltage to the inductor in response to input pulses. A ramp circuit coupled to the inductor generates a ramp signal emulating current of the inductor. A control circuit generates the input pulses to control the driver circuit based on the ramp signal and the output for driving the load. A transient monitoring circuit monitors the output with respect to a predetermined threshold and adjusts the ramp circuit based on the output relative to the predetermined threshold to control the emulated current of the inductor to facilitate jitter and load transient performance.