The Intersil ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128 and ISL6130 are integrated 4-channel controlled-on/controlled-off power-supply sequencers with supply monitoring, fault protection and a âsequence completedâ signal (RESET). For larger systems, more than four supplies can be sequenced by simply connecting a wire between the SYSRESET pins of cascaded ICs. The ISL6125 uses four open-drain outputs to control the on/off sequencing of four supplies. The other sequencers use a patented, micropower 7x charge pump to drive four external low-cost NFET switch gates above the supply rail by 5.3V. These ICs can be biased from 5V down to 1.5V by any supply.
Features
⢠Enables Arbitrary Turn-on and Turn-off Sequencing of Up to Four Power Supplies (0.7V to 5V)
⢠Operates From 1.5V to 5V Supply Voltage
⢠Supplies VDD +5.3V of Charge Pumped Gate Drive
⢠Adjustable Voltage Slew Rate for Each Rail
⢠Multiple Sequencers Can be Daisy-Chained to Sequence an Infinite Number of Independent Supplies
⢠Glitch Immunity
⢠Undervoltage Lockout for Each Supply
⢠1µA Sleep State (ISL6123, ISL6130)
⢠Active High (ISL6123, ISL6130) ENABLE or Low (ISL6124, ISL6125, ISL6126, ISL6127, ISL6128) ENABLE Input
⢠Open Drain Version Available (ISL6125)
⢠Voltage-determined Sequence (ISL6126, ISL6130)
⢠Pre-programmed Sequence Available (ISL6127)
⢠Dual Channel Groupings (ISL6128)
⢠QFN Package
⢠Pb-free (RoHS-compliant)
Applications
⢠Graphics Cards
⢠FPGA/ASIC/Microprocessor/PowerPC Supply Sequencing
⢠Network Routers
⢠Telecommunications Systems
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