Semiconductor device and method for controlling the semiconductor device
AssigneeRenesas Electronics Corporation
InventorWataru ISHIJIMA
Life of this patent
Estimating the term…
Abstract
A semiconductor device capable of stabilizing the output voltage of a linear regulator even when there are variations in operating conditions or load conditions. The linear regulator steps down a primary power supply voltage to a secondary voltage and outputs the secondary voltage. The variable resistor is connected in series with the power supply line with respect to the output voltage of the linear regulator. The ADC detects a voltage corresponding to the output voltage of the linear regulator. The control circuit controls the resistance value of the variable resistor based on the detected output voltage.
Claims14
A semiconductor device comprising:
- a linear regulator that steps down a primary power supply voltage to a secondary voltage and outputs the secondary voltage;
- a variable resistor connected in series with a power supply line that supplies the output voltage to one or more loads with respect to the output voltage of the linear regulator;
- a detection circuit that detects the output voltage;
- and
- a control circuit that controls the resistance value of the variable resistor based on the detected output voltage, comprising a semiconductor device.
A control method for a semiconductor device that steps down a primary power supply voltage to a secondary voltage in a linear regulator, outputs the secondary voltage from the linear regulator, detects the output voltage of the linear regulator, and controls the resistance value of a variable resistor connected in series with a power supply line that supplies the output voltage to one or more loads based on the detected output voltage.
Dependencies are inferred from the claim text.