Overview

The ISL8502 is a synchronous buck controller with internal MOSFETs packaged in a small 4mm x 4mm QFN package. The ISL8502 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 ISL8502 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 ISL8502 features a bidirectional Enable pin that allows the part to pull the enable pin low during fault detection.

ISL8502 Functional Diagram
ISL8502 Functional Diagram
  • 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 Protection
  • Undervoltage Detection
  • Integrated Thermal Shutdown Protection
  • Power-Good Indication
  • Adjustable Soft-Start
  • Start-Up with Pre-Bias Output
  • Pb-free (RoHS Compliant)

Applications

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

Documentation

Design & Development

Software & Tools
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.
Downloads
ISL8502 iSim:PE Model
 Simulator Renesas
1 item
ISL8502EVAL1Z Buck Regulator Eval Board

ISL8502EVAL1Z

Evaluation
Learn More

2A Synchronous Buck Regulator with Integrated MOSFETs Evaluation Board

The ISL8502EVAL1Z evaluation board is used to evaluate the ISL8502 synchronous buck controllers with internal MOSFETs.

The ISL8502 device is a synchronous buck...

Featured Documents:
ISL8502EVAL1Z User Guide

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    MOQ
    Buy / Sample
    Part Number
    ISL8502IRZ
    circleObsolete
    memory
    spa
    view_in_ar
    		QFN Tube 750
    ISL8502IRZ-T
    circleObsolete
    memory
    spa
    view_in_ar
    		QFN Reel 6000
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product