Overview

Description

The ISL6535 is a high performance synchronous controller for demanding DC/DC converter applications. It provides overcurrent fault protection and is designed to safely start-up into prebiased output loads. The output voltage of the converter can be precisely regulated to as low as 0.597V, with a maximum tolerance of ±1% over the commercial temperature range, and ±1.5% over the industrial temperature range. The ISL6535 provides simple, single feedback loop, voltage mode control with fast transient response. It includes a triangle wave oscillator that is adjustable from below 50kHz to over 1.5MHz. Full (0% to 100%) PWM duty cycle support is provided. The error amplifier features a 15MHz gain bandwidth product and 6V/µs slew rate, which enables high converter bandwidth for fast transient performance. The ISL6535's overcurrent protection monitors the current by using the rDS(ON) of the upper MOSFET, which eliminates the need for a current sensing resistor.

Features

  • Operates from +12V input
  • Excellent output voltage regulation
  • 0.597V internal reference
  • ±1% over the commercial temperature range
  • ±1.5% over the industrial temperature range
  • Simple single-loop control design
  • Voltage-mode PWM control
  • Fast transient response
  • High-bandwidth error amplifier
  • Full 0% to 100% duty ratio
  • Leading and falling edge modulation
  • Small converter size
  • Constant frequency operation
  • Oscillator programmable from 50kHz to over 1.5MHz
  • 12V high-speed MOSFET gate drivers
  • 2.0A source/3A sink at 12V low-side gate drive
  • 1.25A source/2A sink at 12V high-side gate drive
  • Drives two N-channel MOSFETs
  • Overcurrent fault monitor
  • High-side MOSFET's rDS(ON) sensing
  • Reduced ~120ns blanking time
  • Converter can source and sink current
  • Soft-start done and an external reference pin for tracking applications are available in the QFN package
  • Pin compatible with ISL6522
  • Supports start-up into prebiased loads
  • Pb-free (RoHS compliant)

Applications

Applications

  • Power Supply for some Pentium®, PowerPC, as well as Graphic CPUs
  • High-Power 12V Input DC/DC Regulators
  • Low-Voltage Distributed Power Supplies

Documentation

Title Type Date
PDF793 KB
Datasheet
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF124 KB
End Of Life Notice
PDF130 KB
Product Advisory
PDF106 KB
Product Advisory
PDF326 KB
Product Change Notice
PDF266 KB
Product Change Notice
PDF398 KB
Product Change Notice
PDF77 KB
Product Change Notice
PDF106 KB
Product Change Notice
PDF173 KB
Product Change Notice
PDF108 KB
Product Change Notice
PDF248 KB
Product Change Notice

Design & Development

Software & Tools

Software & Tools

Title Type Company
iSim:PE Offline Simulation TooliSim 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.Downloads: Simulator Renesas

Software Downloads

Title Type Date
PDF124 KB
End Of Life Notice

Models

Models

Title Type Date
Model - iSim

Support