Features
- 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)
ISL6549 Functional Diagram
Description
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.
Applications
- Processor and memory supplies
- ASIC power supplies
- Embedded processor and I/O supplies
- DSP supplies
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL6549CBZ | Obsolete | N/A | In Stock | RoHS:EN | SOIC | 14# | Tube | 3 | 1.3mm | 8.7 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C |
| ISL6549CBZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | SOIC | 14# | Reel | 3 | 1.3mm | 8.7 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C |
| ISL6549CRZ | Obsolete | N/A | Out of Stock | RoHS:EN | QFN | 16# | Tube | 3 | 0.7mm | 4.0 x 4.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C |
| ISL6549CRZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | QFN | 16# | Reel | 3 | 0.7mm | 4.0 x 4.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | 0 to +70°C |
| ISL6549IAZ | Obsolete | N/A | In Stock | Contact | QSOP | 16# | Tube | 3 | 0.6mm | 4.9 x 3.9 x 1.47 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL6549IAZ-T | Obsolete | N/A | In Stock | Contact | QSOP | 16# | Reel | 3 | 0.6mm | 4.9 x 3.9 x 1.47 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- Product Change NoticePDF 202 KB Jul 07, 2021
- Product Change NoticePDF 326 KB May 21, 2021
- Product Change NoticePDF 266 KB Jun 04, 2020
- Product AdvisoryPDF 106 KB PA16061 Jun 08, 2016
- Product Change NoticePDF 268 KB PCN13037 Jun 11, 2013
- Product Change NoticePDF 207 KB PCN13013 Mar 19, 2013
- Product Change NoticePDF 108 KB PCN12068 Aug 21, 2012
- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
- DocumentPDF 293 KB tb363 May 04, 2018
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- Application NotePDF 397 KB an1684 Jan 19, 2004AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
- Application NotePDF 509 KB an1681 Jan 19, 2004AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
Application Notes & White Papers (2)
- Product Change NoticePDF 202 KB Jul 07, 2021
- Product Change NoticePDF 326 KB May 21, 2021
- Product Change NoticePDF 266 KB Jun 04, 2020View More (9)
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