Low-Voltage Power Sequencers

Jul 21, 2003 12:00 PM, Edited by PETech Staff

7/21/2003

Edited by PETech Staff

Low-Voltage Power Sequencers

Intersil Corp.’s new series of tiny, near-chip-scale-packaged, power-sequencing ICs is targeted for low-voltage applications, such as those found in servers, blade servers, telecom/datacom line cards, graphics cards, and other PC and communications systems. The ISL6123, ISL6124, and ISL6125 low-voltage power sequencers give designers an efficient, flexible, and cost-effective means for safely powering up and powering down low-voltage systems that demand controlled and orderly power sequencing.

These new power sequencers are packaged in the very small and thermally efficient 4 mm × 4 mm Quad Flat No-lead (QFN) package and provide 4-channel control with soft-start and undervoltage protection. They are designed to sequence four voltage channels, each in the range of 0.7V to 5.5V, with any-order flexibility. This flexibility allows the designer to change timing and sequence by simply changing the values of external resistors and capacitors, without requiring any layout changes. Thus, a single part can be used to address a multitude of different voltage and sequence requirements, rather than having to inventory a different part for each combination of voltages and/or sequences.