Maxim Integrated Products is offering a quad-output DC-DC converter, the MAX15022, which integrates dual synchronous DC-DC regulators (4A and 2A) and dual linear controllers to provide four outputs.

The device's switches operate at frequencies from 500kHz to 4MHz, so inductor and capacitor size can be reduced.

The dual converters also operate 180 degrees out of phase, thus reducing the input ripple current and allowing smaller, less expensive input capacitors to be used. With 20mA sink capability, the two integrated linear controllers can drive two external, low-cost PNP transistors to provide two additional power rails that deliver over 1A of output current. The four outputs offer a compact solution for a quad-voltage rail application.

The MAX15022 can externally compensate the switching regulator as well as adjust the output voltage from 0.6V to the input voltage. It will also allow monotonic start-up into a pre-biased output.

The independent enable inputs with analogue thresholds simplify power sequencing during power-up and power-down. In addition, this device can be configured to track the converter output voltage coincidentally or ratiometrically, thus simplifying the design.

See http://www.maxim-ic.com