News & Events
Intersil Releases New Family of Low-Voltage Power Sequencers Offering Simplicity and Flexibility with Reductions in Space and Cost
MILPITAS, CA, July 15, 2003 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog and wireless networking solutions, today announced the release of a new series of tiny, near-chip-scale-packaged, power-sequencing ICs targeted for low voltage applications such as found in servers, blade servers, telecom/datacom line cards, graphics cards, and other PC and communications systems. The new ISL6123, ISL6124, and ISL6125, low-voltage power sequencers provide 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.
All of these new power sequencers are packaged in the very small and thermally efficient 4 X 4 mm Quad Flat No-lead (QFN) package and provide four-channel control with soft-start and under-voltage protection. They are designed to sequence four voltage channels, each in the range of 0.7 to 5.5 V, 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.
Additional flexibility is found in the family itself. The three power sequencers offer variations in features to allow designers a selection of products from which to choose to more accurately match a particular application. The ISL6123 and ISL6124 have the same functionality except the ISL6123 has an active-high ENABLE pin while the ISL6124 has an active-low ENABLE(bar) pin. Additionally, the ISL6123 also has an ultra-low power sleep state when ENABLE is low. The ISL6125 has the same functionality of the ISL6124 but instead of charge-pump driven GATE drive outputs it has open-drain logic outputs that can be pulled up to a maximum of the supply voltage.
ISL6123, ISL6124 and ISL6125 Technical Summary
- 4-channel power sequencing
- 0.7 to 5.5 V channel range
- 1.5 to 5.5 V nominal supply voltage
- Internal charge pump provides V(supply) + 5V of gate drive to allow the use of inexpensive external N-channel MOSFETs as switches
- Under-voltage detection/protection on all channels prevents startup until inputs are stable
- Under-voltage levels are resistor programmed
- On and off delays (sequencing) are capacitor programmed
- ENABLE and RESET pins to allow system control
- Soft-start on all channels
- Power-up and power-down programmed separately
- Sequencer ICs can be daisy-chained to multiply channels
- Near-chip-scale 4 X 4 mm 24-pad QFN package conserves board space
- ISL6123 active-high ENABLE and ultra-low power sleep state
- ISL6124 active-low ENABLE
- ISL6125 same as ISL6124 but has open-drain logic outputs
The ISL6123IR, ISL6124IR and ISL6125IR are available now in the 4 X 4 mm QFN package rated for the 40 deg. C to +85 deg. C industrial temperature range. The price of each part is $3.15 per IC in 100- to 999-unit quantities. Other pricing is available upon request. An evaluation platform that includes a sample of each is available (ISL612XSEQEVAL1). About Intersil
Intersil Corporation is a global semiconductor leader in the design and manufacture of high performance analog and wireless networking solutions. Intersil’s product portfolios address four fast growing markets – flat panel displays, optical storage (CD and DVD recordable), power management and wireless networking. Intersil brings added customer value in providing complete silicon, software and reference design solutions to new products that enhance the computing experience for people wherever they live, work or travel. For more information about Intersil or to find out how to become a member of our winning team, visit the company's web site and career page at: www.intersil.com
This release may include "forward looking statements" that are subject to risks and uncertainties. For information identifying economic, political, climatic, currency, regulatory, technological, competitive and some other important factors that could cause actual results to differ materially from those anticipated in the forward looking statements, see Intersil’s Safe Harbor Forward Looking Statement disclaimer found at http://www.intersil.com/legal.asp, as well as Intersil’s SEC filings as updated from time to time, found at http://www.sec.gov. All trademarks mentioned are the property of their respective owners.
