Triple, 180° Out-of-Phase, Synchronous Step-Down PWM Controller
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Overview
Description
The ISL9444 is a triple-output synchronous buck controller that integrates three PWM controllers which are fully featured and designed to provide multi-rail power for use in products such as cable and satellite set-top boxes, VoIP gateways, cable modems, and other home connectivity products as well as a variety of industrial and general purpose applications. Each output is adjustable down to 0. 7V. The PWMs are synchronized at 180° out-of-phase, thus reducing the input RMS current and ripple voltage. The ISL9444 offers independent power-good indicators, programmable soft-start and tracking functions for ease of supply rail sequencing and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package. Switching frequency can be set between 200kHz and 1200kHz using a resistor. The ISL9444 can be synchronized to another ISL9444 to reduce any beat frequency. The ISL9444 utilizes internal loop compensation to keep minimum peripheral components for a compact design and a low total solution cost. These devices are implemented with current mode control with feed-forward to cover various applications even with fixed internal compensations.
Features
- Three Integrated Synchronous Buck PWM Controllers
- Internal Bootstrap Diodes
- Independent Programmable Output Voltage
- Independent Power-Good Indicators, Soft-Starting and Tracking
- Power Failure Monitor
- Light Load Efficiency Enhancement
- Low Ripple Diode Emulation Mode with Pulse Skipping
- Supports Pre-Biased Output
- Programmable Frequency: 200kHz to 1200kHz
- Adaptive Shoot-through Protection
- Out-of-Phase Switching (0°/180°/0°)
- No External Current Sense Resistor
- Uses Lower MOSFET's rDS(ON)
- Complete Protection
- Overcurrent, Overvoltage, Over-Temperature
- Wide Input Voltage Range: 4.5V to 28V
- Pb-Free (RoHS Compliant)
Applications
Applications
- VoX Gateway Devices
- NAS/SAN Devices
- ATX Power Supplies
Documentation
| Title | Type | Date | |
|---|---|---|---|
PDF1.54 MB
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Datasheet
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PDF509 KB
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Application Note
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PDF397 KB
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Application Note
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PDF603 KB
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End Of Life Notice
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PDF216 KB
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End Of Life Notice
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PDF179 KB
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End Of Life Notice
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PDF1.91 MB
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Other
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PDF52 KB
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Product Advisory
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PDF169 KB
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Product Change Notice
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PDF158 KB
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Product Change Notice
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PDF295 KB
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White Paper
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Design & Development
Software & Tools
Software & Tools
| PowerCompass™ Multi-Rail Design ToolThe PowerCompass tool helps users quickly identify parts that match their specific requirements, set up multiple rails, perform high-level system analysis, and generate custom reference design files. | Simulator | Renesas |
Boards & Kits
Boards & Kits
Triple, 180° Out-of-Phase, Synchronous Step-Down PWM Controller Evaluation Board
The ISL9444EVAL1Z evaluation board is used to evaluate the performance of the ISL9444 triple-output synchronous buck controller.
The ISL9444 is a triple-output...
Featured Documents:
Triple, 180° Out-of-Phase, Synchronous Step-Down PWM Controller Evaluation Board
The ISL9444EVAL3Z evaluation board is used to evaluate the performance of the ISL9444 triple-output synchronous buck controller.
The ISL9444 is a triple-output...
Featured Documents:
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.
Product Options
Processing table
| QFN | Tube | 660 | ||
| QFN | Reel | 6000 | ||
| QFN | Reel | 250 | ||
| QFN | Tube | 660 | ||
| QFN | Reel | 6000 | ||
| QFN | Reel | 250 |
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