18334708. INTERNAL RAMP COMPENSATION FOR CONSTANT ON-TIME BUCK CONVERTER (STMicroelectronics International N.V.)
Contents
INTERNAL RAMP COMPENSATION FOR CONSTANT ON-TIME BUCK CONVERTER
Organization Name
STMicroelectronics International N.V.
Inventor(s)
Niccolo' Brambilla of San Donato Milanese (IT)
Stefano Corona of Borgarello (IT)
Valeria Bottarel of Novara (IT)
Fulvio Ottavio Lissoni of Cusago (IT)
INTERNAL RAMP COMPENSATION FOR CONSTANT ON-TIME BUCK CONVERTER
This abstract first appeared for US patent application 18334708 titled 'INTERNAL RAMP COMPENSATION FOR CONSTANT ON-TIME BUCK CONVERTER
Original Abstract Submitted
An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter including: a comparator configured to generate a comparator output signal by comparing a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in the comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier configured to generate, at an output terminal of the transconductance amplifier, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between the output terminal of the transconductance amplifier and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the transconductance amplifier and a ramp voltage generated by the ramp signal generator.
