Power Sequencing Controllers
Jump to Page Section:
Overview
Description
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 “sequence completed” 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 active 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. The 4-channel ISL6123 (ENABLE input), ISL6124 (ENABLE input) and ISL6125 offer the designer 4-rail control when all four rails must be in minimal compliance before turn-on and during operation. The ISL6123 and ISL6130 have a low-power standby mode when disabled, which is suitable for battery-powered applications. The ISL6125 operates like the ISL6124, but instead of charge-pump-driven gate drive outputs, it has open-drain logic outputs for direct interface to other circuitry. In contrast, for the ISL6126 and ISL6130, each of the four channels operates independently. Each GATE turns on once its individually associated input voltage requirements are met. The ISL6127 is a pre-programmed A-B-C-D turn-on and D-C-B-A turn-off sequenced IC. Once all inputs are in compliance and ENABLE is asserted, sequencing begins. Each subsequent GATE turns on after the previous one turns on. The ISL6128 has two groups of two channels, each with its independent I/O. It is ideal for voltage sequencing into redundant capability loads. All four inputs must be satisfied before turn-on, but a single group fault is ignored by the other group. External resistors provide flexible voltage threshold programming of monitored rail voltages. Delay and sequencing are provided by external capacitors for ramp-up and ramp-down. Additional I/O is provided for indicating and driving the RESET state in various configurations. For volume applications, other programmable options and features are available. Contact Intersil sales support with your needs.
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
- Active 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
Applications
- Graphics Cards
- FPGA/ASIC/Microprocessor/PowerPC Supply Sequencing
- Network Routers
- Telecommunications Systems
Documentation
|
|
Date | |
|---|---|---|
| PDF 1.13 MB | Datasheet | |
| PDF 5.51 MB 日本語 | Brochure | |
| PDF 326 KB | Product Change Notice | |
| PDF 208 KB | Price Increase Notice | |
| PDF 295 KB | White Paper | |
| PDF 223 KB | Product Change Notice | |
| PDF 106 KB | Product Change Notice | |
| PDF 173 KB | Product Change Notice | |
| PDF 248 KB | Product Change Notice | |
| PDF 509 KB | Application Note | |
| PDF 397 KB | Application Note | |
11 items
|
||
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| QFN | Tube | 1500 | ||
| QFN | Reel | 6000 |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product