Patent ID: 6188210
Filing Date: 2001-02-13
Classification: G05F,Y10S

Abstract:
A soft start linear regulator having an input terminal, an output terminal and a common terminal, comprising:a pass transistor and a second transistor, each transistor having first and second terminals and a control terminal, the voltage between the first terminal and the control terminal controlling the conduction between the first and second terminals of the respective transistor;a pass transistor controller coupled to the output terminal and the control terminal of the pass transistor;a resistor;a capacitor;the pass transistor having its first terminal coupled to the input terminal and its second terminal coupled to the output terminal;the second transistor having its first terminal coupled to the first terminal of the pass transistor, its control terminal coupled to the output terminal and its second terminal coupled to the capacitor, the capacitor being coupled to the resistor and the control terminal of the pass transistor, the resistor being coupled to the common terminal;the voltage across the resistor controlling the voltage on the control terminal of the pass transistor during startup and the pass transistor controlling the voltage on the control terminal of the pass transistor after startup.