Evaluation Board For Buck And Synchronous Rectifier Pulse Width Modulator Controller

The ISL6522 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 ISL6522 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The ISL6522 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%.

• 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
• Small converter size
  • Constant frequency operation
  • 200kHz free-running oscillator programmable from 50kHz to over 1MHz
• 14-lead SOIC and TSSOP package and 16-lead 5 x 5mm 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 plus anneal available (RoHS compliant)