Overview

Description

The ISL8502A is a synchronous buck controller with internal MOSFETs packaged in a small 4mmx4mm QFN package. The ISL8502A can support a continuous load of 2A and has a very wide input voltage range. With the switching MOSFETs integrated into the IC, the complete regulator footprint can be very small and provide a much more efficient solution than a linear regulator. The ISL8502A is capable of stand-alone operation or it can be used in a master slave combination for multiple outputs that are derived from the same input rail. Multiple slave channels (up to six) can be synchronized. This method minimizes the EMI and beat frequencies effect with multi-channel operation. The switching PWM controller drives two internal N-Channel MOSFETs in a synchronous-rectified buck converter topology. The synchronous buck converter uses voltage-mode control with fast transient response. The switching regulator provides a maximum static regulation tolerance of ±1% over line, load, and temperature ranges. The output is user-adjustable by means of external resistors down to 0. 6V. The output is monitored for undervoltage events. The switching regulator also has overcurrent protection. Thermal shutdown is integrated. The ISL8502A features a bi-directional Enable pin that allows the part to pull the enable pin low during fault detection. PGOOD delay for ISL8502A has been decreased to 1ms typical (at 500kHz switching frequency) compared to 250ms (at 500kHz) for ISL8502.

Features

  • Up to 2A Continuous Output Current
  • Integrated MOSFETs for Small Regulator Footprint
  • Adjustable Switching Frequency, 500kHz to 1.2MHz
  • Tight Output Voltage Regulation, ±1% Over-temperature
  • Wide Input Voltage Range, 5V ±10% or 5.5V to 14V
  • Wide Output Voltage Range, from 0.6V
  • Simple Single-Loop Voltage-Mode PWM Control Design
  • Input Voltage Feed-Forward for Constant Modulator Gain
  • Fast PWM Converter Transient Response
  • Lossless rDS(ON) High Side and Low Side Overcurrent Protections
  • Undervoltage Detection
  • Integrated Thermal Shutdown Protection
  • Power-Good Indication
  • Adjustable Soft-Start
  • Start-Up with Pre-Bias Output
  • Pb-free (RoHS Compliant)

Applications

Applications

  • Point of Load Applications
  • Graphics Cards - GPU and Memory Supplies
  • ASIC Power Supplies
  • Embedded Processor and I/O Supplies
  • DSP Supplies

Documentation

Title Type Date
PDF1.06 MB
Datasheet
PDF592 KB
Application Note
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF650 KB
Application Note
PDF387 KB
Application Note
PDF349 KB
Application Note
PDF603 KB
End Of Life Notice
PDF398 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
PDF603 KB
End Of Life Notice

Boards & Kits

Boards & Kits

Models

Models

Title Type Date
Model - iSim