| US 7,589,987 B2 | ||
| DC-to-DC converter with improved transient response | ||
| Laszlo Lipcsei, Campbell, Calif. (US) | ||
| Assigned to O2Micro International Limited, Georgetown, Grand Cayman (Cayman Islands) | ||
| Filed on Jul. 10, 2007, as Appl. No. 11/775,544. | ||
| Application 11/775544 is a continuation of application No. 11/379128, filed on Apr. 18, 2006, granted, now 7,242,598, filed on Jul. 10, 2007. | ||
| Application 11/379128 is a continuation of application No. 10/648085, filed on Aug. 26, 2003, granted, now 7,031,174, filed on Apr. 18, 2006. | ||
| Application 10/648085 is a continuation of application No. 10/262537, filed on Oct. 01, 2002, granted, now 6,678,178, filed on Jan. 13, 2004. | ||
| Application 10/262537 is a continuation of application No. 09/843200, filed on Apr. 25, 2001, granted, now 6,459,602, filed on Oct. 01, 2002. | ||
| Claims priority of provisional application 60/244054, filed on Oct. 26, 2000. | ||
| Prior Publication US 2007/0253230 A1, Nov. 01, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H02M 3/158 (2006.01) | ||
| U.S. Cl. 363—132 [363/98; 323/288] | 20 Claims |
| 13. A multiphase DC to DC convener comprising:
a first conversion circuit electrically coupled in said DC to DC converter comprising a first comparator configured to compare
a first signal representative of an output voltage of said first conversion circuit with a first periodic reference signal
having a DC offset determined by a DC reference voltage to provide a first control signal that drives an output voltage of
said DC to DC convener towards a pre-established value;
a second conversion circuit electrically coupled in said DC to DC converter comprising a second comparator configured to compare
a second signal representative of an output voltage of said second conversion circuit with a second periodic reference signal
having a DC offset determined by said DC reference voltage that is phase shifted from said first periodic reference signal
to provide a second control signal that drives an output voltage of said DC to DC convener towards said pre-established value;
and
a current balancing device coupled to said at least a second conversion circuit configured to maintain currents delivered
by said first and said second conversion circuits at a substantially similar level.
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