Jason D Houston

US Patent:

20080278123, Nov 13, 2008

Filed:

Mar 31, 2008

Appl. No.:

12/080263

Inventors:

Gustavo James Mehas - Sunnyvale CA, US
Naveen Jain - Panipat, IN
Jayant Vivrekar - San Jose CA, US
Jason Houston - Cary NC, US

Assignee:

Intersil Americas Inc. - Milpitas CA

International Classification:

G05F 1/00

US Classification:

323266

Abstract:

A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to receive the PWM signal, and a synchronous output switch having a phase node there between controlled by the gate driver, and regulator input current measurement circuitry. The regulator input current measurement circuitry comprises a circuit operable for providing a signal representative of at least one phase node timing parameter, a sensing circuit operable for sensing inductor or output current provided by the regulator, and a calculation circuit coupled to receive the signal representative of the phase node timing parameters and the inductor or output current and is operable to determine the input current.