Device Information
 
 
ISL6522B Printer Friendly Version
 
Buck and Synchronous Rectifier Pulse-Width Modulator (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
ISL6522BCB Active Comm 14 Ld SOIC 1    iBuy Disti-Buy Sample
ISL6522BCB-T Active Comm 14 Ld SOIC T+R 1    iBuy Disti-Buy  
ISL6522BCBZ Active Comm 14 Ld SOIC 3   PB Free iBuy Disti-Buy  
ISL6522BCBZ-T Active Comm 14 Ld SOIC T+R 3   PB Free iBuy Disti-Buy  
ISL6522BCR Active Comm 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6522BCR-T Active Comm 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6522BCRZ Active Comm 16 Ld QFN 3   PB Free iBuy Disti-Buy  
ISL6522BCRZ-T Active Comm 16 Ld QFN T+R 3   PB Free iBuy Disti-Buy  
ISL6522BEVAL1 Active   Eval Board N/A    iBuy Disti-Buy  
ISL6522BIB Active Ind 14 Ld SOIC 1    iBuy Disti-Buy Sample
ISL6522BIB-T Active Ind 14 Ld SOIC T+R 1    iBuy Disti-Buy  
ISL6522BIBZ Active Ind 14 Ld SOIC 3   PB Free iBuy Disti-Buy  
ISL6522BIBZ-T Active Ind 14 Ld SOIC T+R 3   PB Free iBuy Disti-Buy  
ISL6522BIR Active Ind 16 Ld QFN 1    iBuy Disti-Buy Sample
ISL6522BIR-T Active Ind 16 Ld QFN T+R 1    iBuy Disti-Buy  
ISL6522BIRZ Active Ind 16 Ld QFN 3   PB Free iBuy Disti-Buy  
ISL6522BIRZ-T Active Ind 16 Ld QFN T+R 3   PB Free iBuy Disti-Buy  
ISL6522BIRZ-TK Active Ind 16 Ld QFN T+R 3   PB Free iBuy Disti-Buy  
ISL6522BCBZA Coming
Soon		 Comm 14 Ld SOIC 3   PB Free iBuy    
ISL6522BCBZA-T Coming
Soon		 Comm 14 Ld SOIC T+R 3   PB Free iBuy    
ISL6522BCV Coming
Soon		 Comm 14 Ld TSSOP 1    iBuy    
ISL6522BCV-T Coming
Soon		 Comm 14 Ld TSSOP T+R 1    iBuy    
ISL6522BIV Coming
Soon		 Ind 14 Ld TSSOP 1    iBuy    
ISL6522BIV-T Coming
Soon		 Ind 14 Ld TSSOP T+R 1    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 ISL6522B provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522B integrates all of the control, output adjustment, monitoring and protection functions into a single package.

The output voltage of the converter can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1% over temperature and line voltage variations.

The ISL6522B provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. 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 ratio ranges from 0-100%.

The ISL6522B protects against overcurrent conditions by inhibiting PWM operation. The ISL6522B monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.

 
  Key Features
 
  • Drives two N-Channel MOSFETs
  • Operates from +5V or +12V input
  • Simple single-loop control design
    • Voltage-mode PWM control
  • Fast transient response
    • High-bandwidth error amplifier
    • Full 0–100% duty ratio
  • Excellent output voltage regulation
    • 0.8V internal reference
    • ±1% over line voltage and temperature
  • Overcurrent fault monitor
    • Does not require extra current sensing element
    • Uses MOSFETs rDS(ON)
  • Converter can source and sink current
  • Pre-Biased Load Start Up
  • Small converter size
    • Constant frequency operation
    • 200kHz free-running oscillator programmable from 50kHz to over 1MHz
  • 14-lead SOIC package and 16-lead 5x5mm QFN Package
  • QFN Package
    • Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline
    • Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
  • Pb-Free Available (RoHS Compliant)
Related Documentation
 
Datasheet(s)   Datasheet(s):
 
  Parametric Data
VIN (min) (V)2.5
VIN (max) (V)12
VOUT (min) (V).8
VOUT (max) (V)VIN
IOUT (max) (A)25
VBIAS (V)12
IS (typ) (mA)5
 
  Application Block Diagrams
 
 
 
Applications
 
  • Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPC™ microprocessors
  • FPGA Core DC/DC Converters
  • Low-voltage distributed power supplies
 
  Related DevicesParametric Table   Parametric Table
 
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