パワーマネジメント

概要

The ISL6236A dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The ISL6236A includes two pulse-width modulation (PWM) controllers, 5V/3. 3V and 1. 5V/1. 05V. The output of SMPS1 can also be adjusted from 0. 7V to 5. 5V. The SMPS2 output can be adjusted from 0V to 2. 5V by setting REFIN2 voltage. An optional external charge pump can be monitored through SECFB. This device features a linear regulator providing 3. 3V/5V, or adjustable from 0. 7V to 4. 5V output via LDOREFIN. The linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the BYP input. When in switchover, the LDO output can source up to 200mA. The ISL6236A includes on-board power-up sequencing, the power-good (POK) outputs, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. A constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.

ISL6236A Functional Diagram
ISL6236A Functional Diagram
  • Wide Input Voltage Range 4.5V to 25V
  • Dual Fixed 1.05V/3.3V and 1.5V/5.0V Outputs or Adjustable 0.7V to 5.5V (SMPS1) and 0V to 2.5V (SMPS2), ±1.5% Accuracy
  • Secondary Feedback Input (Maintains Charge Pump Voltage)
  • 1.7ms Digital Soft-Start and Independent Shutdown
  • Fixed 3.3V/5.0V, or Adjustable Output 0.7V to 4.5V, ±1.5% (LDO): 200mA
  • 3.3V Reference Voltage ±2.0%: 5mA
  • 2.0V Reference Voltage ±1.0%: 50µA
  • Constant ON-TIME Control with 100ns Load-Step Response
  • Frequency Selectable
  • rDS(ON) Current Sensing
  • Programmable Current Limit with Foldback Capability
  • Selectable PWM, Skip or Ultrasonic Mode
  • BOOT Voltage Monitor with Automatic Refresh
  • Independent POK1 and POK2 Comparators
  • Soft-Start with Pre-Biased Output and Soft-Stop
  • Independent ENABLE
  • High Efficiency - up to 97%
  • Very High Light Load Efficiency (Skip Mode)
  • 5mW Quiescent Power Dissipation
  • Thermal Shutdown
  • Extremely Low Component Count
  • Pb-Free (RoHS Compliant)

アプリケーション

  • Notebook and Sub-Notebook Computers
  • PDAs and Mobile Communication Devices
  • 3-Cell and 4-Cell Li+ Battery-Powered Devices
  • DDR1, DDR2, and DDR3 Power Supplies
  • Graphic Cards
  • Game Consoles
  • Telecommunications

ドキュメント

タイトル
分類 		日付
ISL6236A Datasheet
PDF 3.68 MB 		データシート
産業用パワーマネジメント　カタログ
PDF 5.63 MB 英語 		カタログ
PCN22036 - Shipping medium change from Tube to Tray for listed Renesas TDFN, TQFN, DFN and QFN packaged products
PDF 169 KB 		製品変更通知
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products
PDF 326 KB 		製品変更通知
How Green is Your Cloud?
PDF 295 KB 		ホワイトペーパー
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida
PDF 294 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 		製品変更通知
AN1681: Grounding Techniques
PDF 509 KB 		アプリケーションノート
AN1684: Nonideality of Ground
PDF 397 KB 		アプリケーションノート
11 items

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製品選択

    Processing table
    Pkg. Type
    Carrier Type
    MOQ
    ご購入 / サンプル
    型名
    ISL6236AIRZ
    play_circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    		 QFN Tray 980 サンプルを入手,
    ISL6236AIRZ-T
    play_circleアクティブ
    memory
    spa
    view_in_ar
    サンプル入手可能
    		 QFN Reel 6000 サンプルを入手,
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