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ISL6520A

更新时间： 2024-11-29 14:57:55
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
12页 666K
描述
Single Synchronous Buck Pulse-Width Modulation (PWM) controller

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ISL6520A 数据手册

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DATASHEET  
ISL6520A  
FN9016  
Rev 6.00  
Dec 10, 2009  
Single Synchronous Buck Pulse-Width Modulation (PWM) Controller  
The ISL6520A 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 ISL6520A  
integrates the control, output adjustment, monitoring and  
protection functions into a single 8 Lead package.  
Features  
• Operates from +5V Input  
• 0.8V to V Output Range  
IN  
- 0.8V Internal Reference  
- ±1.5% Over Line Voltage and Temperature  
The ISL6520A 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.  
• 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 error amplifier features a 15MHz gain-bandwidth  
product and 8V/ms slew rate which enables high converter  
bandwidth for fast transient performance. The resulting  
PWM duty cycles range from 0% to 100%.  
• Lossless, Programmable Overcurrent Protection  
- Uses Upper MOSFET’s r  
DS(ON)  
• Small Converter Size  
- 300kHz Fixed Frequency Oscillator  
- Internal Soft-Start  
Protection from overcurrent conditions is provided by  
monitoring the r  
of the upper MOSFET to inhibit PWM  
DS(ON)  
- 8 Ld SOIC or 16 Ld 4mmx4mm QFN  
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  
Pinouts  
ISL6520A  
- Near Chip Scale Package footprint, which improves  
PCB efficiency and has a thinner profile  
(8 LD SOIC)  
TOP VIEW  
• Pb-Free (RoHS Compliant)  
BOOT  
UGATE  
GND  
1
2
3
4
8
7
6
5
PHASE  
COMP/SD  
FB  
Applications  
• Power Supplies for Microprocessors  
- PCs  
LGATE  
VCC  
- Embedded Controllers  
• Subsystem Power Supplies  
- PCI/AGP/GTL+ Buses  
ISL6520A  
(16 LD QFN)  
TOP VIEW  
- ACPI Power Control  
- SSTL-2 and DDR SDRAM Bus Termination Supply  
• Cable Modems, Set Top Boxes, and DSL Modems  
• DSP and Core Communications Processor Supplies  
• Memory Supplies  
16 15 14 13  
BOOT  
1
2
3
4
12 NC  
UGATE  
GND  
NC  
11 COMP/OCSET  
10 NC  
• Personal Computer Peripherals  
• Industrial Power Supplies  
9
FB  
• 5V-Input DC/DC Regulators  
5
6
7
8
• Low-Voltage Distributed Power Supplies  
FN9016 Rev 6.00  
Dec 10, 2009  
Page 1 of 12  
1234567...12

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