Semiconductor devices, DCDC converter and power s

专利名称：Semiconductor devices, DC/DC converter

and power supply

发明人：Masaki Shiraishi,Takayuki Iwasaki,Nobuyoshi

Matsuura

申请号：US11175288申请日：20050707

公开号：US200600032A1公开日：20060112

专利附图：

摘要：A semiconductor device in which the self-turn-on phenomenon is prevented thatcan significantly improve power conversion efficiency. The semiconductor device is a

system-in-package for power supply applications in which a high-side switch, a low-sideswitch, and two drivers are included in a single package. The device includes an auxiliaryswitch disposed between the gate and source of said low-side switch, and a low-sideMOSFET for the low-side switch and an auxiliary MOSFET for the auxiliary switch aredisposed on the same chip. In this way, the self-turn-on phenomenon can be prevented,allowing the mounting of a low-side MOSFET with a low threshold voltage and therebysignificantly improving power conversion efficiency. The gate of the auxiliary MOSFET isdriven by the driver for the high-side MOSFET thereby eliminating the need for a newdrive circuit and realizing the same pin configuration as existing products, which facilitateseasy replacement.

申请人：Masaki Shiraishi,Takayuki Iwasaki,Nobuyoshi Matsuura

地址：Hitachi JP,Hitachi JP,Takasaki JP

国籍：JP,JP,JP

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