Low noise, low power, fast startup, and low drop-out voltage...

Details Low noise, low power, fast startup, and low drop-out voltage... Low noise, low power, fast startup, and low drop-out voltage...

2005-01-13

2008-07-08

Sterrett, Jeffrey L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C327S558000, C327S538000

Reexamination Certificate

active

07397226

ABSTRACT:
A circuit and method for providing voltage regulation that operates with relatively low noise, low power, fast start up and low dropout. The invention includes a constant voltage reference that is coupled to a reference amplifier which amplifies the reference voltage to a selectable level. The output of the reference amplifier is provided to an integrated low pass noise filter which suppresses at least the noise generated by the constant voltage reference and the reference amplifier. The output of the integrated noise filter is provided to the inverting input of an error amplifier, whose non-inverting input is coupled to the output voltage (VOUT). Also, the output of the error amplifier is coupled to a gate of a pass transistor that is coupled between the input voltage (VIN) and the output voltage (VOUT) of the invention.

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