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ISL6520

更新时间： 2024-11-27 22:57:23
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英特矽尔 - INTERSIL 控制器
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11页 401K
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Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

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ISL6520  
®
Data Sheet  
October 4, 2005  
FN9009.4  
Single Synchronous Buck Pulse-Width  
Modulation (PWM) Controller  
Features  
• Operates from +5V Input  
The ISL6520 makes 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 ISL6520 integrates the  
control, output adjustment, monitoring and protection  
functions into a single 8-pin package.  
• 0.8V to V Output Range  
IN  
- 0.8V Internal Reference  
- ±1.5% Over Line Voltage and Temperature  
• Drives N-Channel MOSFETs  
• Simple Single-Loop Control Design  
- Voltage-Mode PWM Control  
The ISL6520 provides 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.  
• Fast Transient Response  
- High-Bandwidth Error Amplifier  
- Full 0% to 100% Duty Cycle  
• Lossless, Programmable Over-Current Protection  
- Uses Upper MOSFET’s r  
DS(on)  
The error amplifier features a 15MHz gain-bandwidth  
product and 8V/µs slew rate which enables high converter  
bandwidth for fast transient performance. The resulting  
PWM duty cycles range from 0% to 100%.  
• Small Converter Size  
- 300kHz Fixed Frequency Oscillator  
- Internal Soft Start  
- 8 Ld SOIC or 16Ld 4x4mm 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 Plus Anneal Available (RoHS Compliant)  
Protection from over-current conditions is provided by  
monitoring the r  
of the upper MOSFET to inhibit PWM  
DS(ON)  
operation appropriately. This approach simplifies the  
implementation and improves efficiency by eliminating the  
need for a current sense resistor.  
Ordering Information  
Applications  
• Power Supplies for Microprocessors  
- PCs  
PART  
PART  
TEMP.  
PKG.  
NUMBER MARKING RANGE (°C)  
PACKAGE  
8 Ld SOIC  
DWG. #  
ISL6520CB 6520CB  
0 to 70  
0 to 70  
M8.15  
- Embedded Controllers  
ISL6520CBZ 6520CBZ  
(Note)  
8 Ld SOIC (Pb-free) M8.15  
• Subsystem Power Supplies  
- PCI/AGP/GTL+ Buses  
- ACPI Power Control  
ISL6520IB  
6520IB  
-40 to 85 8 Ld SOIC  
M8.15  
ISL6520IBZ 6520IBZ  
(Note)  
-40 to 85 8 Ld SOIC (Pb-free) M8.15  
• Cable Modems, Set Top Boxes, and DSL Modems  
• DSP and Core Communications Processor Supplies  
• Memory Supplies  
ISL6520CR ISL6520CR  
0 to 70  
16 Ld 4x4mm QFN L16.4x4  
ISL6520IR  
ISL6520IR  
-40 to 85 16 Ld 4x4mm QFN L16.4x4  
Evaluation Board  
ISL6520EVAL1  
• Personal Computer Peripherals  
* Add “-T” suffix for tape and reel.  
• Industrial Power Supplies  
NOTE: Intersil Pb-free plus anneal products employ special Pb-free  
material sets; molding compounds/die attach materials and 100% matte  
tin plate termination finish, which are RoHS compliant and compatible  
with both SnPb and Pb-free soldering operations. Intersil Pb-free  
products are MSL classified at Pb-free peak reflow temperatures that  
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.  
• 5V-Input DC/DC Regulators  
• Low-Voltage Distributed Power Supplies  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2003, 2005. All Rights Reserved  
1
All other trademarks mentioned are the property of their respective owners.  
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