Semtech Debuts SC2441 Triple-Output Controller

Semtech Corp. (Camarillo, CA), a producer of analog and mixed-signal semiconductors, announced its new SC2441, a low input voltage, two-phase, synchronous step-down controller with an integrated step-up converter. The device is capable of generating three output voltages to meet the multi-output power requirements in most telecommunications and networking systems.

The dual-phase, step-down controller can be configured to supply two individually controlled and regulated 20 A outputs, 180 ° out-of-phase or, alternatively, the two phases can be interleaved into one low-ripple 40 A output. The SC2441’s integrated boost step-up switching regulator offers an additional output or can be used to generate a bias supply to drive the gates of MOSFETs at low input-voltage conditions. As a result, no separate gate supply is required, lowering cost and space requirements while simplifying the design.

Other SC2441 features include individual, per-phase, soft-start and overload timers; programmable, fixed-switching frequency up to 1 MHz; up to a 90% duty cycle; and an individual enable pin for controlling power sequencing of each phase. The device also incorporates Semtech’s patented Combi-Sense™ technique for providing lossless peak current mode control, eliminating the need for an external current sense resistor.

The SC2441 controller is available now in production quantities, and is priced at $2.95 each in 1,000-piece lots. The device comes in a 28-pin, lead-free, TSSOP package and is orderable by the part number SC2441ITSTRT.