Title:
半導体集積回路装置
Document Type and Number:
Japanese Patent JP4461817
Kind Code:
B2
Abstract:
A semiconductor integrated circuit device for a power source capable of being expanded to cope with an increase or decrease in the load includes an outer transistor attached to the outer side of an IC, and a transistor incorporated thereon simultaneously operated to enhance the current output capability of a linear regulator when a load is great. A control circuit controls the transistor to produce a constant voltage, and controls the outer transistor to control the current ratio of the current flowing into the transistor and the current flowing into the outer transistor. An over-current detecting circuit detects, at one time, the collector currents of the transistors flowing into the output line, and executes an over-current protection control based on the detected values.
Inventors:
Goro Ueda
Application Number:
JP2004018391A
Publication Date:
May 12, 2010
Filing Date:
January 27, 2004
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G05F1/10; G05F1/56; H03F1/52; H03K17/082
Domestic Patent References:
| JP57118416U | ||||
| JP11136049A | ||||
| JP2000278940A | ||||
| JP61217814A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Kiyoshi Ogawa
Kiyoshi Ogawa