Overview

The ISL6440 is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0. 8V. The two PWMs are synchronized 180o out of phase reducing the RMS input current and ripple voltage. The ISL6440 incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1 and SD2). A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.

ISL6440 Functional Diagram
ISL6440 Functional Diagram
  • Wide Input Supply Voltage Range
  • 5.6V to 24V
  • 4.5V to 5.6V
  • Two Independently Programmable Output Voltages
  • Switching Frequency 300kHz
  • Out of Phase PWM Controller Operation
  • Reduces Required Input Capacitance and Power Supply Induced Loads
  • No External Current Sense Resistor
  • Uses Lower MOSFET's rDS(ON)
  • Programmable Soft-Start
  • Extensive Circuit Protection Functions
  • PGOOD
  • UVLO
  • Overcurrent
  • Overtemperature
  • Independent Shutdown for Both PWMs
  • Excellent Dynamic Response
  • Voltage Feed-Forward with Current Mode Control
  • Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

  • Power Supplies with Two Outputs
  • xDSL Modems/Routers
  • DSP, ASIC, and FPGA Power Supplies
  • Set-Top Boxes
  • Dual Output Supplies for DSP, Memory, Logic, µP Core and I/O
  • Telecom Systems

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL6440 Datasheet
PDF 683 KB 简体中文
White Paper
How Green is Your Cloud?
PDF 295 KB
End Of Life Notice
PLC18018 - General Q3 Product Life Cycle Notice
PDF 388 KB
Product Change Notice
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II
PDF 398 KB
Product Change Notice
PCN13037 - Alternate Bond Wire Material for Assembly of the Listed Intersil QSOP Packaged Product
PDF 268 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
7 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
ISL6440 iSim:PE Model
 Simulator Renesas
1 item
ISL6440EVAL1Z Buck PWM Controller Eval Board

ISL6440EVAL1Z

Evaluation
Learn More

300kHz, Dual, 180° Out-of-Phase, Step-Down PWM Controller Evaluation Board

The ISL6440EVAL1Z evaluation board highlights the operation of the ISL6440 300kHz dual, 180° out-of-phase, step-down pulse width modulation (PWM) controller in an...

Featured Documents:
ISL6440EVAL1Z 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.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    ISL6440IAZ
    circleLast Time Buy
    memory
    spa
    view_in_ar
    Samples Available
    		 QSOP Tube 3.215 Get Samples,
    ISL6440IAZ-T
    circleObsolete
    memory
    spa
    view_in_ar
    		QSOP Reel
    ISL6440IAZ-TK
    circleLast Time Buy
    memory
    spa
    view_in_ar
    Samples Available
    		 QSOP Reel Get Samples,
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