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ISL6527A

更新时间： 2024-11-28 23:59:51
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其他 - ETC 控制器
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Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

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ISL6527  
®
Data Sheet  
July 2003  
FN9056.4  
Single Synchronous Buck Pulse-Width  
Modulation (PWM) Controller  
The ISL6527 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 ISL6527  
integrates the control, output adjustment, monitoring and  
protection functions into a single package.  
Features  
• Operates from 3.3V to 5V input  
• Utilizes an external reference  
• 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  
The ISL6527 provides simple, single feedback loop, voltage-  
mode control with fast transient response. The output  
voltage can be regulated to as low as the provided external  
reference. A fixed frequency oscillator reduces design  
complexity, while balancing typical application cost and  
efficiency.  
• Lossless, programmable overcurrent protection  
- Uses upper MOSFET’s r  
DS(ON)  
• Converter can source and sink current  
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%.  
• Small converter size  
- Internal fixed frequency oscillator  
-
-
ISL6527: 300kHz  
ISL6527A: 600kHz  
Protection from overcurrent conditions is provided by  
- Internal soft-start  
- 14 Lead SOIC or 16 Lead, 5x5 QFN  
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.  
• QFN Package:  
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat  
No Leads - Package Outline  
Ordering Information  
- Near Chip Scale Package footprint, which improves  
PCB efficiency and has a thinner profile  
TEMP  
o
PART NUMBER RANGE ( C)  
PACKAGE  
14 Lead SOIC  
14 Lead SOIC  
PKG DWG. #  
M14.15  
Applications  
• Power supplies for microprocessors  
- PCs  
ISL6527CB  
ISL6527ACB  
ISL6527CR  
ISL6527ACR  
ISL6527IB  
0 to 70  
0 to 70  
M14.15  
0 to 70  
16 Lead 5x5 QFN L16.5x5B  
16 Lead 5x5 QFN L16.5x5B  
- Embedded controllers  
0 to 70  
• Subsystem power supplies  
- PCI/AGP/GTL+ busses  
- ACPI power control  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
14 Lead SOIC  
14 Lead SOIC  
M14.15  
M14.15  
ISL6527AIB  
ISL6527IR  
- DDR SDRAM bus termination supply  
16 Lead 5x5 QFN L16.5x5B  
16 Lead 5x5 QFN L16.5x5B  
• Cable modems, set top boxes, and DSL modems  
• DSP and core communications processor supplies  
• Memory supplies  
ISL6527AIR  
ISL6527EVAL1 ISL6527 SOIC Evaluation Board  
ISL6527EVAL2 ISL6527 QFN Evaluation Board  
ISL6527AEVAL2 ISL6527A SOIC Evaluation Board  
ISL6527AEVAL2 ISL6527A QFN Evaluation Board  
• Personal computer peripherals  
• Industrial power supplies  
• 3.3V-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 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.  
1
All other trademarks mentioned are the property of their respective owners.  
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