The Intersil ISL8723 and ISL8724 are 4 channel sequencers controlling the on and off sequence of voltages with undervoltage supply fault protection and a sequence completed signal (RESET). For larger systems, more than 4 voltages can be sequenced by a simple connection of multiple IC's. These sequencers use an integrated charge pump to drive 4 external low-cost N-channel MOSFET switch gates above the IC bias voltage by 5. 3V. These IC's can be biased from and control any supply from 2. 5V to 5V and additionally monitor any voltage above 0. 7V. Individual product descriptions follow. The four channel ISL8723 (ENABLE input), ISL8724 (ENABLE input) offer the designer 4 voltage control when it is required that all four rails are in minimal compliance prior to turn on and that compliance must be maintained during operation. The ISL8723 has a low power standby mode when it is disabled suitable for battery powered applications. External resistors provide flexible voltage threshold programming of monitored voltages. Delay and sequencing timing are programmable by external capacitors for both ramp up and ramp down.

Features

  • Enables arbitrary turn-on and turn-off sequencing of up to four power supplies (0.7V to 5V)
  • Operates from 2.5V to 5V supply voltage
  • Supplies VDD +5.3V of charge pumped gate drive
  • Adjustable voltage slew rate for each rail
  • Multiple sequencers can be easily daisy-chained to sequence an infinite number of independent voltages
  • Glitch immunity
  • Undervoltage lockout for each monitored supply voltage
  • 30µA Sleep State (ISL8723)
  • Active high (ISL8723) or low (ISL8724) ENABLE input
  • Pb-free (RoHS compliant)

Applications

  • Graphics cards
  • FPGA/ASIC/microprocessor/PowerPC supply sequencing
  • Network Routers
  • Telecommunications Systems

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 75
Availability
Active QFN Reel 6000
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL8723, ISL8724 Datasheet Datasheet PDF 713 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
How Green is Your Cloud? White Paper PDF 295 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
PCNs & PDNs
PCN13060 - Test Site Change for the Listed Intersil Products Product Change Notice PDF 223 KB
PCN13025 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and STATS ChipPAC (SCM) - Kuala Lumpur, Mal Product Change Notice PDF 106 KB
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump Product Change Notice PDF 173 KB
Other
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB