概要

The ISL9440B and ISL9440C are quad-output synchronous buck controllers that integrate three PWM controllers and one 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 ISL9440B and ISL9440C offer programmable 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. An early warning function is offered to output a logic signal to warn the system to back up data when input voltage falls below a certain level. The ISL9440B and ISL9440C 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.

ISL9440B Functional Diagram
ISL9440B Functional Diagram
  • Three Integrated Synchronous Buck PWM Controllers
  • Internal Bootstrap Diodes
  • Internal Compensation
  • Independent Control for each Regulator and Programmable Output Voltages; Independent Enable/Shutdown/Soft-start
  • Fixed Switching Frequency: 300kHz(B), 600kHz(C)
  • Adaptive Shoot-Through Protection on all Synchronous Buck Controllers
  • Pre-biased Output Start-up Capability
  • 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 on Input Voltage Failure
  • Integrated Reset Function
  • Pb-Free (RoHS Compliant)

アプリケーション

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

ドキュメント

= ピックアップ
分類 タイトル 日時
データシート
ISL9440B, ISL9440C Datasheet
PDF 2.17 MB
その他資料
TB389: PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages
PDF 1.17 MB
製品変更通知
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products
PDF 326 KB
ホワイトペーパー
How Green is Your Cloud?
PDF 295 KB
製品変更通知
PCN13025 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and STATS ChipPAC (SCM) - Kuala Lumpur, Mal
PDF 106 KB
製品変更通知
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
PDF 173 KB
製品変更通知
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia
PDF 248 KB
アプリケーションノート
AN1681: Grounding Techniques
PDF 509 KB
アプリケーションノート
AN1684: Nonideality of Ground
PDF 397 KB
9件

設計・開発

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ISL9440A iSim:PE Model
 Simulator ルネサス
1件
ISL9440AEVAL1Z Buck PWM and Single Linear Controller Eval Board

ISL9440BEVAL1Z

Evaluation
詳しくはこちら

Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller Evaluation Board

The ISL9440BEVAL1Z evaluation board is used to evaluate the performance of the ISL9440B quad-output synchronous buck controller.

The ISL9440B is a quad-output...

主要ドキュメント:
ISL9440BEVAL1Z User Guide

ECADモデル

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Diagram of ECAD Models

製品選択

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    ご購入 / サンプル
    型名
    ISL9440BIRZ
    circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    今すぐ購入する
    		QFN Tube 3 5.283 サンプルを入手,
    ISL9440BIRZ-T
    circleアクティブ
    memory
    spa
    view_in_ar
    		QFN Reel 3
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