Device Information
 
 
ISL6520 Printer Friendly Version
 
Single Synchronous Buck Pulse-Width Modulation (PWM) Controller
 
Datasheets,
Related Docs
& Simulations		DescriptionKey
Features		Parametric
Data		Application
Diagrams		Related
Devices
 
 
Ordering Information
Green/Pb(Lead free) Device  Available in RoHS/Pb-Free
 Buy direct from Intersil  Check distributor inventory  Request samples
Part No. Design-In
Status		 Temp. Package MSL Price
US $		 PB Free
ISL6520CB Active Comm 8 Ld SOIC 1    iBuy Disti-Buy  
ISL6520CB-T Active Comm 8 Ld SOIC T+R 1    iBuy Disti-Buy  
ISL6520CBZ Active Comm 8 Ld SOIC 1   PB Free iBuy Disti-Buy  
ISL6520CBZ-T Active Comm 8 Ld SOIC T+R 1   PB Free iBuy Disti-Buy  
ISL6520CR Active Comm 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6520CR-T Active Comm 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6520CRZ Active Comm 16 Ld QFN 3   PB Free iBuy Disti-Buy  
ISL6520CRZ-T Active Comm 16 Ld QFN T+R 3   PB Free iBuy Disti-Buy  
ISL6520EVAL1 Active   Eval Board N/A    iBuy Disti-Buy  
ISL6520IB Active Ind 8 Ld SOIC 1    iBuy Disti-Buy  
ISL6520IB-T Active Ind 8 Ld SOIC T+R 1    iBuy Disti-Buy  
ISL6520IBZ Active Ind 8 Ld SOIC 1   PB Free iBuy Disti-Buy  
ISL6520IBZ-T Active Ind 8 Ld SOIC T+R 1   PB Free iBuy Disti-Buy  
ISL6520IR Active Ind 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6520IR-T Active Ind 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6520IRZ Coming
Soon		 Ind 16 Ld QFN 3   PB Free iBuy    
ISL6520IRZ-T Coming
Soon		 Ind 16 Ld QFN T+R 3   PB Free iBuy    
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
 
  Description

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.

The ISL6520 provides simple, single feedback loop, voltagemode 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 8V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.

Protection from over-current 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.

 
  Key Features
 
  • Operates from +5V Input
  • 0.8V to VIN Output Range
    • 0.8V Internal Reference
    • ±1.5% Over 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 Over-Current Protection
    • Uses Upper MOSFET’s rDS(on)
  • 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)
Related Documentation
 
Datasheet(s)   Datasheet(s):
 
Technical Brief(s)   Technical Brief(s):
 
Evaluation Board(s)   Evaluation Board(s):
 
   Other:
 
  Parametric Data
VIN (min) (V)2.5
VIN (max) (V)5
VOUT (min) (V).8
VOUT (max) (V)5
IOUT (max) (A)20
VBIAS (V)5
IS (min) (mA) 
IS (typ) (mA)3.2
 
  Application Block Diagrams
 
 
 
Applications
 
  • Power Supplies for Microprocessors
    • PCs
    • Embedded Controllers
  • Subsystem Power Supplies
    • PCI/AGP/GTL+ Buses
    • ACPI Power Control
  • Cable Modems, Set Top Boxes, and DSL Modems
  • DSP and Core Communications Processor Supplies
  • Memory Supplies
  • Personal Computer Peripherals
  • Industrial Power Supplies
  • 5V-Input DC-DC Regulators
  • Low-Voltage Distributed Power Supplies
 
  Related DevicesParametric Table   Parametric Table
 
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 ISL6268 High-Performance Notebook PWM Controller 
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 ISL6341 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6341A 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
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 ISL6406 Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6420 Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6420A PWM Controller with Wide VIN, Start-Up into Pre-Bias Load 
 ISL6439 Single Sync Buck PWM Controller for Broadband Gateway Applications 
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 ISL6520B Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6522 Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller 
 ISL6522A Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller 
 ISL6522B Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller 
 ISL6525 Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller 
 ISL6526 Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6526A Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6527 Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6527A Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6535 Synchronous Buck Pulse-Width Modulator (PWM) Controller 
 ISL6540 Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased Load Capability 
 ISL6540A Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased Load Capability 
 ISL6545 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL6545A 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller 
 ISL8104 Synchronous Buck Pulse-Width Modulator (PWM) Controller 
 ISL8105 1V to 12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers 
 ISL8105A 1V to 12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers 
 ISL8105B +5V or +12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers, Extended Soft-Start Time 
 ISL8106 Wide VIN, 7V to 25V, Single-Phase PWM Controller with Integrated MOSFET Drivers 
 ISL8107 Single-Phase Pulse-Width Modulation (PWM) Controller with Wide (9V-75V) VIN Range 
 ISL8118 3.3V to 20V Single-Phase PWM Controller with Integrated 2A/4A MOSFET Drivers 

 
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