Device Information
 
 
ISL6520A Printer Friendly Version
 
Single Synchronous Buck Pulse-Width Modulation (PWM) controller ISL6520A
 
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
ISL6520ACB Active Comm 8 Ld SOIC 1    iBuy Disti-Buy Sample
ISL6520ACB-T Active Comm 8 Ld SOIC T+R 1    iBuy Disti-Buy Sample
ISL6520ACBZ Active Comm 8 Ld SOIC 1   PB Free iBuy Disti-Buy Sample
ISL6520ACBZ-T Active Comm 8 Ld SOIC T+R 1   PB Free iBuy Disti-Buy  
ISL6520ACBZA Active Comm 8 Ld SOIC 1   PB Free iBuy Disti-Buy Sample
ISL6520ACBZA-T Active Comm 8 Ld SOIC T+R 1   PB Free iBuy Disti-Buy  
ISL6520ACR Active Comm 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6520ACR-T Active Comm 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6520AIB Active Ind 8 Ld SOIC 1    iBuy Disti-Buy Sample
ISL6520AIB-T Active Ind 8 Ld SOIC T+R 1    iBuy Disti-Buy Sample
ISL6520AIBZ Active Ind 8 Ld SOIC 1   PB Free iBuy Disti-Buy  
ISL6520AIBZ-T Active Ind 8 Ld SOIC T+R 1   PB Free iBuy Disti-Buy  
ISL6520AIR Active Ind 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6520AIR-T Active Ind 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6520AIRZ Active Ind 16 Ld QFN 3   PB Free iBuy Disti-Buy  
ISL6520AIRZ-T Active Ind 16 Ld QFN T+R 3   PB Free iBuy Disti-Buy  
ISL6520ACRZ Coming
Soon		 Comm 16 Ld QFN 3   PB Free iBuy    
ISL6520ACRZ-T Coming
Soon		 Comm 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 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.

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.

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%.

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.

 
  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 Overcurrent Protection
    • Uses Upper MOSFET’s rDS(ON)
  • Small Converter Size
    • 300kHz Fixed Frequency Oscillator
    • Internal Soft-Start
    • 8 Ld SOIC or 16 Ld 4mmx4mm 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
 
Application Note(s)   Application Note(s):
 
Datasheet(s)   Datasheet(s):
 
Technical Brief(s)   Technical Brief(s):
 
i-Sim   i-Sim:
 
   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
    • SSTL-2 and 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
  • 5V-Input DC/DC Regulators
  • Low-Voltage Distributed Power Supplies
 
  Related DevicesParametric Table   Parametric Table
 
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