The ISL9440, ISL9440A and ISL9441 are quad-output synchronous buck controllers that integrate 3 PWM controllers and 1 low drop-out linear regulator controller, which are full featured and designed to provide multi-rail power for use in products such as cable and satellite set-top boxes, VoIP gateways, cable modems, and other home connectivity products as well as a variety of industrial and general purpose applications. Each output is adjustable down to 0. 8V. The PWMs are synchronized at 180° out of phase thus reducing the RMS input current and ripple voltage. The ISL9440, ISL9440A and ISL9441 offer internal soft-start, independent enable inputs for ease of supply rail sequencing, and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package. The ISL9440 and ISL9440A offers an early warning function to output a logic signal to warn the system to back up data when the input voltage falls below a certain level. The ISL9440, ISL9440A and ISL9441 are utilize internal loop compensation to keep minimum peripheral components for compact design and a low total solution cost. These devices are implemented with current mode control with feed forward to cover various applications even with fixed internal compensations. The table below shows the difference in terms of ISL9440, ISL9440A and ISL9441 features.

PART NUMBER EARLY WARNING SWITCHING FREQUENCY (kHz)
ISL9440 YES 300
ISL9440A YES 600
ISL9441 NO 300

特性

  • Three integrated synchronous buck PWM controllers
  • Internal bootstrap diodes
  • Internal compensation
  • Internal soft-start
  • Independent control for each regulator and programmable output voltages; independent enable/shutdown
  • Fixed Switching Frequency: 300kHz (ISL9440, ISL9441); 600kHz (ISL9440A)
  • Adaptive shoot through protection on all synchronous buck controllers
  • Independently programmable voltage outputs
  • Out-of-phase switching to reduce input capacitance (0°/180°/0°)
  • No external current sense resistor
  • Uses lower MOSFET's rDS(ON)
  • Current mode controller with voltage feed forward
  • Complete protection
  • Overcurrent, overvoltage, undervoltage lockout, over-temperature
  • Cycle-by-cycle current limiting
  • Wide input voltage range
  • Input rail powers VIN Pin: 5.6V to 24V
  • Input rail powers VCC_5V Pin (VIN tied to VCC_5V, for 5V input applications): 4.5V to 5.6V
  • Early warning (ISL9440, ISL9440A) on input voltage failure
  • Integrated reset function (ISL9440, ISL9440A)
  • Pb-free (RoHS compliant)

应用

  • Satellite and Cable Set-Top Boxes
  • Cable Modems
  • VoX Gateway Devices
  • NAS/SAN Devices

产品选择

器件号 Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 60
Availability
Active QFN Reel 6000
Availability

文档和下载

文档标题 language 类型 文档格式 文件大小 日期
数据手册与勘误表
ISL9440, ISL9440A, ISL9441 Datasheet 日本語 数据手册 PDF 1.52 MB
使用指南与说明
ISL9440EVAL2Z User Guide 手册 PDF 1.22 MB
应用指南 &白皮书
Five Easy Steps to Create a Multi-Load Power Solution 白皮书 PDF 846 KB
How Green is Your Cloud? 白皮书 PDF 295 KB
AN1684: Nonideality of Ground 应用文档 PDF 397 KB
AN1681: Grounding Techniques 应用文档 PDF 509 KB
PCN / PDN
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL 产品变更通告 PDF 183 KB
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump 产品变更通告 PDF 173 KB
PCN10083 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia 产品变更通告 PDF 79 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia 产品变更通告 PDF 248 KB
下载
ISL9440EVAL2Z Design Files Design File ZIP 349 KB
其他
ISL9440 Triple Sync Buck with Linear Reg iSim:PE Model 原理图 SXSCH 253 KB
TB389: PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages 其他 PDF 958 KB

软件和工具页面

文档标题 类型 Description Company
iSim:PE Offline Simulation Tool Simulator 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. Renesas

开发板与套件

器件号 文档标题 类型 Company
ISL9440CEVAL1Z Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller Evaluation Board 评估 Renesas
ISL9440EVAL2Z Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller Evaluation Board 评估 Renesas