Semtech Debuts New SC1109 Power-Management Device
Semtech Corp. (Newbury Park, CA) debuted a new power-management device that integrates a dc/dc switching regulator controller and two linear regulators, intended to provide the three distinct voltage levels required in new Pentium III-based systems and other tri-mode power-supply applications. Semtech claims that the new SC1109 device reduces component count, board-space requirements and has a comparable cost to existing solutions. The company also maintains that the device reduces integration effort and speeds up the overall design cycle.
The SC1109's switching circuitry consists of a PWM buck controller, featuring lossless current sensing and latched driver outputs. This section of the device operates at a fixed 200KHz frequency with the output voltage internally fixed at 1.2V. The linear circuitry consists of LDO regulators, rated at 1.8V and 2.5V, which are designed to track the system's 3.3V power supply when it turns on and off.
“Semtech maintains its leadership position in the power-management market with the single-chip SC1109 device," said Don Ashley, vice president of desktop power-management products at Semtech. “The company is committed and fully capable of supplying the high-volume, high-quality power requirements for customers. This product is representative of Semtech's world-class power-management solutions."
