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ISL8105

Obsolete

+5V or +12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers

Features

  • Operates from +5V or +12V Bias Supply Voltage
  • 1.0V to 12V Input Voltage Range (up to 20V possible with restrictions; see "Input Voltage Considerations" on page 9)
  • 0.6V to VIN Output Voltage Range
  • 0.6V Internal Reference Voltage
  • ±1.0% Tolerance Over the Commercial Temperature Range (0°C to +70°C)
  • ±1.5% Tolerance Over the Industrial Temperature Range (-40°C to +85°C).
  • Integrated MOSFET Gate Drivers that Operate from VBIAS (+5V to +12V)
  • Bootstrapped High-side Gate Driver with Integrated Boot Diode
  • Drives N-Channel MOSFETs
  • Simple Voltage-Mode PWM Control
  • Traditional Dual Edge Modulation
  • Fast Transient Response
  • High-Bandwidth Error Amplifier
  • Full 0% to 100% Duty Cycle
  • Fixed Operating Frequency
  • 300kHz for ISL8105
  • 600kHz for ISL8105A
  • Fixed Internal Soft-Start with Pre-biased Load Capability
  • Lossless, Programmable Overcurrent Protection
  • Uses Bottom-side MOSFET's rDS(ON)
  • Enable/Disable Function Using COMP/EN Pin
  • Output Current Sourcing and Sinking Currents
  • Pb-Free (RoHS Compliant)
Find Other Products in Buck Controllers (External FETs)
ISL8105_ISL8105A Functional Diagram
ISL8105_ISL8105A Functional Diagram

Description

The ISL8105, ISL8105A is a simple single-phase PWM controller for a synchronous buck converter. It operates from +5V or +12V bias supply voltage. With integrated linear regulator, boot diode, and N-Channel MOSFET gate drivers, the ISL8105, ISL8105A reduces external component count and board space requirements. These make the IC suitable for a wide range of applications. Utilizing voltage-mode control, the output voltage can be precisely regulated to as low as 0. 6V. The 0. 6V internal reference features a maximum tolerance of ±1. 0% over the commercial temperature range, and ±1. 5% over the industrial temperature range. Two fixed oscillator frequency versions are available; 300kHz (ISL8105 for high efficiency applications) and 600kHz (ISL8105A for fast transient applications). The ISL8105, ISL8105A features the capability of safe start-up with pre-biased load. It also provides overcurrent protection by monitoring the ON-resistance of the bottom-side MOSFET to inhibit PWM operation appropriately. During start-up interval, the resistor connected to BGATE/BSOC pin is employed to program overcurrent protection condition. This approach simplifies the implementation and does not deteriorate converter efficiency.

Applications

  • 5V or 12V DC/DC Regulators
  • Industrial Power Systems
  • Telecom and Datacom Applications
  • Test and Measurement Instruments
  • Distributed DC/DC Power Architecture
  • Point of Load Modules
Part NumberStatusSamplesStockRoHSPackageLead Count (#)Carrier TypeMoisture Sensitivity Level (MSL)Pitch (mm)Pkg. Dimensions (mm)Pb (Lead) FreePb Free CategoryTemp. Range (°C)
ISL8105IBZObsoleteN/AIn StockRoHS:EN
SOIC8#Tube31.3mm4.9 x 3.9 x 0.00YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
ISL8105IBZ-TObsoleteN/AOut of StockRoHS:EN
SOIC8#Reel31.3mm4.9 x 3.9 x 0.00YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
ISL8105IRZObsoleteN/AIn StockRoHS:EN
DFN10#Tube30.5mm3.0 x 3.0 x 0.90YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
ISL8105IRZ-TObsoleteN/AOut of StockRoHS:EN
DFN10#Reel30.5mm3.0 x 3.0 x 0.90YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
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    Recommended Documents (1)

  1. Datasheet
    ISL8105, ISL8105A Datasheet
    RECOMMENDED
    PDF 1.12 MB isl8105-a Nov 29, 2006

    Datasheets (1)

  1. Datasheet
    ISL8105, ISL8105A Datasheet
    RECOMMENDED
    PDF 1.12 MB isl8105-a Nov 29, 2006

    Application Notes & White Papers (2)

  1. Application Note
    AN1684: Nonideality of Ground
    PDF 397 KB an1684 Jan 19, 2004
    AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
  2. Application Note
    AN1681: Grounding Techniques
    PDF 509 KB an1681 Jan 19, 2004
    AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.
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Simulation Models

    Software & Tools (1)

  1. Simulator
    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.

    Simulation Models (1)

  1. Model - iSim
    ISL8105 iSim:PE Model
    Log in to Download SXSCH 103 KB SI100177 Mar 25, 2021
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