Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
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Overview
Description
The ISL6526, ISL6526A make simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter. Designed to drive N-Channel MOSFETs in a synchronous buck topology, the ISL6526, ISL6526A integrate the control, output adjustment, monitoring and protection functions into a single package. The ISL6526, ISL6526A provide simple, single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1.5% over-temperature and line voltage variations. A fixed frequency oscillator reduces design complexity, while balancing typical application cost and efficiency. The error amplifier features a 15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%. Protection from overcurrent conditions is provided by monitoring the rDS(ON) of the upper MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.
Features
- Operates from 3.3V to 5V Input
- 0.8V to VIN Output Range
- 0.8V Internal Reference
- ±1.5% Over Load, Line Voltage and Temperature
- Drives N-Channel MOSFETs
- Simple Single-Loop Control Design
- Voltage-Mode PWM Control
- Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
- Lossless, Programmable Overcurrent Protection
- Uses Upper MOSFET's rDS(ON)
- Converter can Source and Sink Current
- Small Converter Size
- Internal Fixed Frequency Oscillator
- ISL6526: 300kHz
- ISL6526A: 600kHz
- Internal Soft-Start
- 14 Ld SOIC or 16 Ld 5x5 QFN
- QFN Package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile
- Pb-Free (RoHS Compliant)
Applications
Applications
- Power Supplies for Microprocessors
- PCs
- Embedded Controllers
- Subsystem Power Supplies
- PCI/AGP/GTL+ Buses
- ACPI Power Control
- DDR SDRAM Bus Termination Supply
- Cable Modems, Set-Top Boxes, and DSL Modems
- DSP and Core Communications Processor Supplies
- Memory Supplies
- Personal Computer Peripherals
- Industrial Power Supplies
- 33V-Input DC/DC Regulators
- Low-Voltage Distributed Power Supplies
Documentation
|
|
Date | |
|---|---|---|
| PDF 865 KB | Datasheet | |
| PDF 388 KB | End Of Life Notice | |
| PDF 225 KB | Product Change Notice | |
| PDF 152 KB | Product Change Notice | |
| PDF 509 KB | Application Note | |
| PDF 397 KB | Application Note | |
| PDF 562 KB | Other | |
| PDF 839 KB | Application Note | |
8 items
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Design & Development
Software & Tools
Software & Tools
| Software title
|
Software type
|
Company
|
|---|---|---|
| iSim:PE Offline Simulation Tool iSim 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.
|
Simulator | Renesas |
1 item
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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
Pkg. Type |
Carrier Type |
MOQ |
Buy / Sample |
|
|---|---|---|---|---|
| Part Number | ||||
| SOICN | Tube | 2000 | ||
| SOICN | Reel | 2500 | ||
| SOICN | Tube | 2000 | ||
| SOICN | Reel | 2500 | ||
| QFN | Tube | 1200 | ||
| QFN | Reel | 6000 | ||
| QFN | Reel | 3000 |
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