07427853 is referenced by 2 patents and cites 2 patents.

A switching power regulator for performing DC-to-DC conversion may be implemented with a soft-start circuit configured to ensure orderly power-up of the switching power regulator by controlling the maximum output current delivered to a load while maintaining proper voltage regulation during start-up. The soft-start circuit may use combinations of reference voltages generated by a reference voltage digital-to-analog converter and a programmable width burst-pulse to control an output voltage of the switching power regulator during start-up without requiring external components. The soft-start circuit may provide burst-pulses directly to a drive circuit configured in the switching power regulator to control the output voltage of the switching power regulator, thereby beginning to ramp up the output voltage of the switching power regulator from zero volts. A specified number of clock cycles after the output voltage has reached a specified value, the soft-start circuit may switch control of the drive circuit from the burst pulses to regular PWM or PFM operating modes.

Title
Soft-start circuit for a DC-to-DC converter
Application Number
11/424447
Publication Number
7427853 (B2)
Application Date
June 15, 2006
Publication Date
September 23, 2008
Inventor
Yu En Tzeng
Sunnyvale
CA, US
Agent
Anthony Diepenbrock
James W Huffman
Assignee
VIA Technologies
TW
IPC
G05F 1/40
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