In some electronic projects you will need an unusual regulated voltage , unusual , because the voltage required is very small and you can not use zenner diodes or some other tricks due of a compact design . In that case you can use this voltage regulator circuit based on the NCP571 , NCV571 which 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 ) .
This power supply circuit is designed based on the LT3758 current mode, DC DC controller which is capable of generating either positive or negative output voltages. The LTC3758 can be configured as either a boost, flyback, SEPIC or inverting converter.
The operating frequency of LT3758 can be set with an external resistor over a 100kHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin.
The LT3758 supports a wide input voltage range from 5.5V up to 100V .
Using the LTC3412 monolithic synchronous, step-down DC/DC converter from Linear Technology you can design an simple low cost , high efficiency power supply circuit for portable applications like : battery-powered equipment , notebook computers , distributed power systems , cellular telephones and other devices .
The LTC3412 is a utilizing a constant frequency, current mode architecture which operates from an input voltage range of 2.625V to 5.5V .
LTC3412 voltage regulator provides an adjustable regulated output voltage from 0.8V to 5V while delivering up to 2.5A output current.