Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2000-02-25
2001-05-08
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S273000, C323S282000
Reexamination Certificate
active
06229289
ABSTRACT:
SUMMARY OF THE INVENTION
The present invention provides a method and apparatus for transitioning a power converter between a switched mode of operation and a linear regulator mode of operation in a single power converter. An intermediate mode of operation and associated circuitry is provided that allows the switched mode and linear regulator mode to cooperate to produce a shared power converter output having reduced noise and voltage ripple as compared to a converter that is alternating between switched mode and fully-on modes of operation.
REFERENCES:
patent: 5541499 (1996-07-01), Villard
patent: 5592072 (1997-01-01), Brown
patent: 5945820 (1999-08-01), Namgoong et al.
patent: 5959443 (1999-09-01), Littlefield
patent: 5994885 (1999-11-01), Wilcox et al.
patent: 5998977 (1999-12-01), Hsu et al.
Vishay Siliconix, New Product Description, Si9167, 600-mA Synchronous Buck Converter for 2-Cell Li+ Cellular Phones, Document No. 70898, S-63920, Rev. C, Aug. 23, 1999.
Maxim Integrated Products, Product Description, MAX1677, Compact, High-Efficiency, Dual-Output Step-Up and LCD Bias DC-DC Converter, 19-1403; Rev 0; 11/98.
Maxim Integrated Products, Product Description, MAX1692, Low-Noise, 5.5V-Input, PWM Step-Down Regulator, 19-1400; Rev 0; 11/98.
Maxim Integrated Products, Product Description, MAX748A/MAX763A, 3.3V, Step-Down, Current-Mode PWM DC-DC Converters, 19-0190; Rev 0; 9/93.
Impala Linear Corporation, Product Description, ILC6390/1, SOT-89 Step-Up PFM Switcher with Auto-Load Sense, Jun. 1996.
Dixon, Lloyd H., Jr., “Switching Power Supply Topology Review”, Unitrode Power Supply Design Manual, published by Unitrode Corporation, Lexington, Massachusetts, 1985.
Linear Technology Corporation, “Design Notes—A Simple Ultra-Low Dropout Regulator”, No. 32 in a series, Mar. 1990.
Naviasky Eric H.
Piovaccari Alessandro
Ramsey Carl A.
Cadence Design Systems Inc.
Han Jessica
Lyon & Lyon LLP
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