NCP571 , NCV571 low power regulator circuit

The NCP571 , NCV571 are low current voltage regulators available in  few standard output voltage versions (  0.8 V, 0.9 V, 1.0 V and 1.2 V  ) . The NCP571 , NCV571 low dropout linear regulators are designed for handheld communication equipment and portable battery powered applications which require low quiescent current. The NCP571 , NCV571 series features an ultra−low quiescent current of 4.0 uA.

NCP571 , NCV571 device contains a voltage reference unit, an error amplifier, a PMOS power transistor, resistors for setting output voltage, current limit, and temperature limit protection circuits.

The design of the circuit is very simple and offers many features like : low quiescent current of 4.0 uA typical , maximum operating voltage of 12 V , low output voltage option down to 0.8 V , high accuracy output voltage of 3.0% .