The LT3570 simplifies complex multi-rail power supply designs by integrating three DC/DC regulators into a single package: a current mode buck regulator, a current mode boost regulator, and an LDO controller. It offers a wide operating voltage range, each regulator has independent input voltages and shutdown circuitry, and it has soft-start circuitry.
The document describes the LT3570, a monolithic dual-output switching regulator that integrates a current mode buck regulator, a current mode boost regulator, and an LDO controller into a single package. It simplifies complex multi-rail power supply designs by allowing independent input voltages ranging from 2.5V to 40V.
The independent input voltages support a wide operating range from 2.5V up to 40V.
The LDO controller has an output current capability of 10mA.
The frequency can be set from 500kHz to 3MHz by an external resistor or synchronized to an external oscillator.