Microsemi Introduces New LX1671DC/DC Controllers

Microsemi Corp. (Irvine, CA) announced its new LX1671 multi-phase, dc/dc controller, the first in a new line of load-sharing, multiple-output, integrated circuits suitable for use in multi-output power supplies, video card power supplies, double-data-rate termination, computer peripherals, set-top boxes, gaming consoles, and portable PC processor and I/O supplies.

The LX1671 is designed to reduce system costs by replacing several conventional parts with one LoadSHARE device. The controller provides up to four independently regulated outputs from a three-phase PWM controller, including one linear regulator driver. The LX1671 regulates from input voltages ranging from 3V to 12V, with an output-voltage capability as low as 0.8V. Each PWM phase is capable of supplying up to 15A of load current while the integrated linear regulator can supply up to 5A. Two of the constant-frequency, voltage-mode, PWM phases can be configured for either a single bi-phase, high-current output, or two independently regulated outputs, providing broad power supply design flexibility.

The LX1671 is available for immediate sampling and delivery in a choice of 38-pin TSSOP or MLPQ surface-mount packages, with 10,000-piece-quantity pricing at $2.01 and $1.78, respectively.