Constant on-time architecture for switching regulators

Details Constant on-time architecture for switching regulators Constant on-time architecture for switching regulators

1996-03-26

1998-05-05

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323285, 323283, G05F 156

Patent

active

057479763

ABSTRACT:
A switching voltage regulator whose switching frequency decreases with reduced load currents is disclosed. The switching voltage regulator includes a current-controlled oscillator that varies the frequency of switching by changing the off-time of the switch and maintaining a constant on-time. The lower frequency as a result of the constant on-time switching reduces switching loss and power consumption at lower load currents. The constant on-time architecture of the present invention significantly improves the overall efficiency of the switching voltage regulator, while reducing component count and die size.

REFERENCES:
patent: 4350891 (1982-09-01), Wuerflein
Maxim Dual-Output Power-Supply Controller for Notebook Computers, Rev. 1; May 1994.
Linear Technology Synchronous Regulator Controller for N-or-P Channel Mosfets, Initial Release, Feb. 1995.

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