Overview

The ISL8018 is a high efficiency, monolithic, synchronous step-down DC/DC converter that can deliver up to 8A continuous output current from a 2. 7V to 5. 5V input supply. The output voltage is adjustable from 0. 6V to VIN. With an adjustable current limit, reverse current protection, prebias start and over-temperature protection, the ISL8018 offers a highly robust power solution. It uses current control architecture to deliver fast transient response and excellent loop stability. The ISL8018 integrates a pair of low ON-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and minimize external component count. 100% duty-cycle operation allows less than 250mV dropout at 8A output current. Adjustable frequency and synchronization allow the ISL8018 to be used in applications requiring low noise. The ISL8018 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads. The ISL8018 is offered in a space saving 20 Ld 3x4 QFN lead free package with exposed pad lead frames for excellent thermal performance. The complete converter occupies less than 96. 8mm2 area.

ISL8018 Functional Diagram
ISL8018 Functional Diagram
  • High efficiency synchronous buck regulator with up to 97% efficiency
  • ±10% output voltage margining
  • Adjustable current limit
  • Start-up with prebiased output
  • Internal soft-start - 1ms or adjustable, internal/external compensation
  • Soft-stop output discharge during disabled
  • Adjustable frequency from 500kHz to 4MHz - default at 1MHz
  • External synchronization up to 4MHz - master to slave phase shifting capability
  • Peak current limiting, hiccup mode short-circuit protection and over-temperature protection

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL8018 Datasheet
PDF 1.27 MB
Product Change Notice
PCN23005 - Alternate RDL Pad Plating used in the listed Renesas QFN and TQFN packaged products
PDF 178 KB
Application Note
AN9208: High Frequency Power Converters
PDF 592 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
Application Note
AN9210: A New Pspice Subcircuit For The Power MOSFET Featuring Global Temperature Options
PDF 650 KB
Application Note
AN9209: A Spice-2 Subcircuit Representation For Power MOSFETs Using Empirical Methods
PDF 387 KB
Application Note
AN7244: Understanding Power MOSFETs
PDF 349 KB
8 items

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
ISL8018 iSim:PE Model
 Simulator Renesas
1 item
ISL8018DEMO1Z Board Top

ISL8018DEMO1Z

Demonstration
Learn More

8A Low Quiescent Current High-Efficiency Synchronous Buck Regulator Demonstration Board

The ISL8018DEMO1Z demonstration board is intended for use by individuals with requirements for point-of-load applications sourcing from 2.7V to 5.5V. The ISL8018DEMO1Z...

Featured Documents:
ISL8018DEMO1Z User Guide
ISL8018EVAL3Z Board Top

ISL8018EVAL3Z

Evaluation
Learn More

8A Low Quiescent Current High-Efficiency Synchronous Buck Regulator Evaluation Board

The ISL8018EVAL3Z evaluation board is intended for use by individuals with requirements for point-of-load applications sourcing from 2.7V to 5.5V. The ISL8018EVAL3Z is...

Featured Documents:
ISL8018EVAL3Z 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
    Moisture Sensitivity Level (MSL)
    Buy / Sample
    Part Number
    ISL8018IRAJZ-T
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 QFN Reel 3 Get Samples,
    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