Single 12V Input Supply Dual Regulator - Synchronous Rectified Buck PWM and Linear Power Controller
Overview
The ISL6549 provides the power control and protection for two output voltages in high-performance applications. The dual-output controller drives two N-Channel MOSFETs in a synchronous rectified buck converter topology and one N-Channel MOSFET in a linear configuration. The controller is ideal for applications where regulation of both the processing unit and memory supplies is required. The synchronous rectified buck converter incorporates simple, single feedback loop, voltage-mode control with fast transient response. Both the switching regulator and linear regulator provide a maximum static regulation tolerance of ±1% over line, load, and temperature ranges. Each output is user-adjustable by means of external resistors. An integrated soft-start feature brings both supplies into regulation in a controlled manner. Each output is monitored via the FB pins for undervoltage events. If either output drops below 75% of the nominal output level, both converters are shut off and go into retry mode. The ISL6549 is available in a 14 Ld SOIC package, 16 Ld QSOP, or 16 Ld 4x4 QFN packages.
ISL6549 Functional Diagram
- Single 12V bias supply (no 5V supply is required)
- Provides two regulated voltages
- One synchronous rectified buck PWM controller
- One linear controller
- Both controllers drive low cost N-Channel MOSFETs
- Small converter size
- Adjustable frequency 150kHz to 1MHz
- Small external component count
- Excellent output voltage regulation
- Both outputs: ±1% over temperature
- 12V down conversion
- PWM and linear output voltage range: down to 0.8V
- Simple single-loop voltage-mode PWM control design
- Fast PWM converter transient response
- High-bandwidth error amplifier
- Undervoltage fault monitoring on both outputs
- Pb-free plus anneal available (RoHS compliant)
- Processor and memory supplies
- ASIC power supplies
- Embedded processor and I/O supplies
- DSP supplies
Documentation
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PDF884 KB
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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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PDF1.17 MB
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End Of Life Notice
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PDF1.19 MB
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Manual - Development Tools
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PDF293 KB
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Other
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PDF106 KB
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Product Advisory
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PDF202 KB
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Product Change Notice
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PDF326 KB
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Product Change Notice
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PDF266 KB
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Product Change Notice
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PDF268 KB
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Product Change Notice
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PDF207 KB
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Product Change Notice
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PDF108 KB
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Product Change Notice
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PDF846 KB
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White Paper
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PDF295 KB
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White Paper
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Design & Development
Software & Tool Pages
| Title | Type | Company |
|---|---|---|
| iSim:PE Offline Simulation TooliSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.Downloads: | Simulator | Renesas |
Boards & Kits
Single 12V Input Supply Dual Regulator Evaluation Board
Featured Documents:
Single 12V Input Supply Dual Regulator Evaluation Board
Featured Documents:
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
