Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP2017077138
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce the influence of output fluctuation in a charge pump circuit.SOLUTION: A semiconductor device 100 comprises: a charge pump circuit 4 for generating a boosting voltage VCP higher than a power supply voltage Vbb; a smoothing circuit 15 for smoothing the boosting voltage VCP to generate a smoothed boosting voltage VCP2; and a post-stage circuit (e.g., overcurrent protection circuit 13) which operates when receiving supply of the smoothed boosting voltage VCP2. The smoothing circuit 15 includes: a current mirror 151 for generating a charging current Ic which fluctuated in a behavior similar to the boosting voltage VCP; and a capacitor 152 for outputting a charging voltage Vc corresponding the charging current Ic as a smoothed boosting voltage VCP.SELECTED DRAWING: Figure 8
Inventors:
TAKAHASHI NAOKI
Application Number:
JP2015204789A
Publication Date:
April 20, 2017
Filing Date:
October 16, 2015
Export Citation:
Assignee:
ROHM CO LTD
International Classes:
H02M3/07; H01L21/822; H01L27/04
Attorney, Agent or Firm:
Sano patent office