Power management IC targets i.MX6, ARM processors

The LTC3676 and LTC3676-1 are power management solutions for portable processors including Freescale’s i.MX6 series, PXA, OMAP, ARM Cortex, and other advanced portable microprocessor-based systems. The devices contain four synchronous step-down dc/dc converters for core, memory, I/O, and system-on-chip rails plus three 300-mA LDO regulators, with dynamic control and sequencing.

The LTC3676-1 configures a 1.5-A buck regulator for source/sink and tracking operation to support DDR memory termination and also adds a VTTR reference output for DDR. These two pin features replace the LDO4 enable and feedback pins of the LTC3676. Supporting the multiple regulators are a configurable power-sequencing capability, dynamic voltage scaling output voltage control, a pushbutton interface controller, and regulator control via an I² C interface with status reporting and an interrupt output. The devices' four constant-frequency current-mode buck switching regulators are internally compensated and provide up to 2.5-, 2.5-, 1.5-, and 1.5-A output currents. Pricing for 1,000 pieces starts at $5.50 each for the E grade.