The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
These days, constant on-time current mode (COTCM) control scheme is widely used in the voltage regulator (VR) controllers because it has a higher light-load efficiency and a higher BW design capability while maintaining a simpler compensation requirement. One issue plaguing the COTCM control is its slow transient response which is caused by its fixed TON operation. During the heavy-load step-up transient,...
These days, variable frequency current mode controls are widely used in voltage regulators (VRs) for their higher light load efficiency, better small signal property and better transient response than fixed frequency current mode controls. One major issue for variable frequency control is its large switching frequency (fsw) variation with duty cycle. This variable fSW creates unpredictable noise in...
These days, constant on-time current mode (COTCM) control schemes are widely used in the industry VR controllers for its light load efficiency and higher BW design with simpler compensation requirement. In COTCM control, external ramp is required to be added for jittering reduction to improve the noise performance of the controller. But unfortunately, with the increment of external ramp value, although...
These days inductor current ripple based ‘current mode constant on time (CMCOT)’ control is widely used in voltage regulators (VRs) for its higher light load efficiency, higher bandwidth and simple compensation network. In today's VRs, high load current with very high slew rate is a very common requirement in microprocessor or memory applications. One issue of this ripple based CMCOT control is that,...
This paper presents a new current mode control using charge control concept to improve the performances of the constant on time control. These days, constant on time control is widely used in VR applications for its higher light load efficiency and higher bandwidth design capability. In this constant on time configuration, inductor current ripple based current mode control is very popular in today's...
In this paper, a simple but effective method to improve the load transient performance in constant on time (COT) control is proposed along with its circuit implementation. In COT control, if on time (Ton) is too small because of high frequency or conventional adaptive on time control, it might become comparable to minimum off time of the system and hence can create undershoot at load step up. On the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.