概要

説明

The ISL6269A IC is a Single-phase Synchronous-Buck PWM controller featuring Intersil's Robust Ripple Regulator R3™ Technology that delivers truly superior dynamic response to input voltage and output load transients. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Intersil’s R3™ Technology combines the best features of fixed-frequency PWM and hysteretic PWM while eliminating many of their shortcomings. R3™ Technology employs an innovative modulator that synthesizes an AC ripple voltage signal VR, analogous to the output inductor ripple current. The AC signal VR enters a window comparator where the lower threshold is the error amplifier output VCOMP, and the upper threshold is a programmable voltage reference VW, resulting in generation of the PWM signal. The voltage reference VW sets the steady-state PWM frequency. Both edges of the PWM can be modulated in response to input voltage transients and output load transients, much faster than conventional fixed-frequency PWM controllers. Unlike a conventional hysteretic converter, the ISL6269A has an error amplifier that provides ±1% voltage regulation at the FB pin. The ISL6269A has a 1. 5ms digital soft-start and can be started into a prebiased output voltage. A resistor divider is used to program the output voltage setpoint. The ISL6269A can be configured to operate in Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM), which improves light-load efficiency. In CCM the controller always operates as a synchronous rectifier, however when DEM is enabled, the low-side MOSFET is permitted to stay off, blocking negative current flow into the low-side MOSFET from the output inductor.

特長

  • High performance R3™ Technology
  • Fast transient response
  • ±1% regulation accuracy: -10°C to +100°C and -40°C to +100°C
  • Wide input voltage range: +5.0V to +25.0V
  • Output voltage range: +0.6V to +3.3V
  • Wide output load range: 0A to 25A
  • Selectable diode emulation mode for increased light load efficiency
  • Programmable PWM frequency: 200kHz to 600kHz
  • Prebiased output start-up capability
  • Integrated MOSFET drivers and bootstrap diode
  • Internal digital soft-start
  • Power good monitor
  • Fault protection
  • Undervoltage protection
  • Soft crowbar overvoltage protection
  • Low-side MOSFET rDS(ON) overcurrent protection
  • Over-temperature protection
  • Fault identification by PGOOD pull down resistance
  • Pb-free (RoHS compliant)

製品比較

アプリケーション

アプリケーション

  • PCI express graphical processing unit
  • Auxiliary power rail
  • VRM
  • Network adapter

ドキュメント

分類 タイトル 日付
データシート PDF 793 KB
カタログ PDF 5.63 MB 英語
製品変更通知 PDF 169 KB
製品変更通知 PDF 202 KB
製品変更通知 PDF 326 KB
製品変更通知 PDF 398 KB
製品変更通知 PDF 106 KB
製品変更通知 PDF 173 KB
製品変更通知 PDF 79 KB
製品変更通知 PDF 248 KB
アプリケーションノート PDF 509 KB
アプリケーションノート PDF 397 KB
その他資料 PDF 303 KB
13 items

設計・開発

ソフトウェア/ツール

ソフトウェア/ツール

Software title
Software type
会社名
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.
Simulator ルネサス
1 item

ボード&キット

ボード&キット

モデル

モデル

分類 タイトル 日付
モデル-iSim SXSCH 129 KB
1 item