Device Information
 
 
ISL6526A 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
 iBuy direct from Intersil  iBuy direct - out of stock  Request samples
 Check distributor inventory Green/Pb(Lead free) Device  Available in RoHS/Pb-Free  
Part No. Design-In
Status		 Temp. Package MSL Price
US $		 PB Free
ISL6526ACBZ Active Comm 14 Ld SOIC 3 1.25 PB Free Buy Direct Disti-Buy Sample
ISL6526ACBZ-T Active Comm 14 Ld SOIC T+R 3 1.25 PB Free Disti-Buy  
ISL6526AEVAL1 Active   Eval Board N/A Contact Us   Disti-Buy  
ISL6526AEVAL2 Active   Eval Board N/A Contact Us   Disti-Buy  
ISL6526AIRZ Active Ind 16 Ld QFN 3 1.06 PB Free Buy Direct Disti-Buy Sample
ISL6526AIRZ-T Active Ind 16 Ld QFN 3 1.06 PB Free Disti-Buy  
ISL6526AIRZ-TK Active Ind 16 Ld QFN T+R 3 1.06 PB Free Disti-Buy  
ISL6526ACRZ Coming
Soon		 Comm 16 Ld QFN 3 Contact Us PB Free    
ISL6526ACRZ-T Coming
Soon		 Comm 16 Ld QFN T+R 3 Contact Us PB Free    
ISL6526AIBZ Coming
Soon		 Ind 14 Ld SOIC 3 1.35 PB Free    
ISL6526AIBZ-T Coming
Soon		 Ind 14 Ld SOIC T+R 3 1.35 PB Free    
ISL6526ACB InActive Comm 14 Ld SOIC 1 N/A      
ISL6526ACB-T InActive Comm 14 Ld SOIC T+R 1 N/A      
ISL6526ACR InActive Comm 16 Ld QFN 1 N/A      
ISL6526ACR-T InActive Comm 16 Ld QFN T+R 1 N/A      
ISL6526AIB InActive Ind 14 Ld SOIC 1 N/A      
ISL6526AIB-T InActive Ind 14 Ld SOIC T+R 1 N/A      
ISL6526AIR InActive Ind 16 Ld QFN 1 N/A      
ISL6526AIR-T InActive Ind 16 Ld QFN T+R 1 N/A      
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 ISL6526, ISL6526A make 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 ISL6526, ISL6526A integrate the control, output adjustment, monitoring and protection functions into a single package.

The ISL6526, ISL6526A provide 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 6V/μs 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 3.3V to 5V Input
  • 0.8V to VIN Output Range
    • 0.8V Internal Reference
    • ±1.5% Over Load, 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)
  • Converter can Source and Sink Current
  • Small Converter Size
    • Internal Fixed Frequency Oscillator
    • ISL6526: 300kHz
    • ISL6526A: 600kHz
  • Internal Soft-Start
  • 14 Ld SOIC or 16 Ld 5x5 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 (RoHS Compliant)
Related Documentation
 
Datasheet(s)   Datasheet(s):
 
Technical Brief(s)   Technical Brief(s):
 
Evaluation Board(s)   Evaluation Board(s):
 
i-Sim   i-Sim:
 
 
  Parametric Data
VIN (min) (V)2.5
VIN (max) (V)5
VOUT (min) (V).8
VOUT (max) (V)VIN
IOUT (max) (A)20
VBIAS (V)3.3 to 5
IS (min) (mA)6.1
IS (typ) (mA)6.9
 
  Application Block Diagrams
 
 
 
Applications
 
  • Power Supplies for Microprocessors
    • PCs
    • Embedded Controllers
  • Subsystem Power Supplies
    • PCI/AGP/GTL+ Buses
    • ACPI Power Control
    • 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
  • 3.3V-Input DC/DC Regulators
  • Low-Voltage Distributed Power Supplies
 
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