概览

简介

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 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 ISL6522 provides simple, single feedback loop, voltage-mode 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 ISL6522 protects against overcurrent conditions by inhibiting PWM operation. The ISL6522 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.

特性

  • 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 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)

产品对比

应用

应用

  • Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPC microprocessors
  • High-power 5V to 3xV DC-DC regulators
  • Low-voltage distributed power supplies

文档

类型 文档标题 日期
数据手册 PDF 818 KB
产品变更通告 PDF 169 KB
End Of Life Notice PDF 320 KB
产品变更通告 PDF 108 KB
产品变更通告 PDF 152 KB
应用文档 PDF 509 KB
应用文档 PDF 397 KB
其他 PDF 562 KB
8 items

设计和开发

软件与工具

软件与工具

Software title
Software type
公司
iSim:PE Offline Simulation Tool
iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
Simulator 瑞萨电子
1 item

模型