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MAX1636
휴대용 CPU 전원용 저전압, 정밀 스텝 다운 컨트롤러


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전체 데이터 시트 (PDF, 252kB)
English Download this datasheet in PDF format다운로드
The MAX1636 is a synchronous, buck, switch-mode, power-supply controller that generates the CPU supply voltage in battery-powered systems. It achieves ±1% output voltage accuracy and offers the excellent load-transient response needed by upcoming generations of dynamic-clock CPUs.

Up to 95% efficiency is achieved through synchronous rectification and Maxim's proprietary Idle Mode™ control scheme. Efficiency is greater than 80% over a 1000:1 load-current range, extending battery life in system-suspend or standby modes. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Strong, 1A, on-board gate drivers ensure fast, external N-channel MOSFET switching.

The MAX1636 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode that reduces noise and RF interference in sensitive mobile communications and pen-entry applications. Holding SKIP high forces fixed-frequency mode for lowest noise under all load conditions.

For a low-cost version that omits the +5V VL linear-regulator block and comes in a smaller 16-pin QSOP package, refer to the MAX1637 data sheet.

주요기능   애플리케이션/용도
  • ±1% DC Accuracy (Adjustable Mode)
  • Output Overvoltage Crowbar Protection
  • Output Undervoltage Shutdown
  • Adjustable Switching Frequency to 340kHz
  • Low-Dropout Operation
  • Idle Mode Pulse-Skipping Operation
  • 1.10V to 5.5V Adjustable Output Voltage
  • 2.5V/3.3V Dual-Mode Fixed-Output Settings
  • Internal Digital Soft-Start
  • 1.1V ±1% Reference Output
  • 3µA (typ) Shutdown Current
  • Open-Drain Power-Good Output (active-low RESET)
  • 20-Pin SSOP Package

 
  • 버스 터미네이션 전원
  • 컴퓨터: 데스크톱, 워크스테이션, 서버
  • 노트북 컴퓨터
  • 서브노트북 컴퓨터

    Key Specifications:   Step-Down Switching Regulators
    Part Number VIN (min) (V) VIN (max) (V) Min. VOUT (V) Max. VOUT (V) Preset VOUT (V) IOUT (A) IOUT (A) Output Adj. Method Operating Current, ICC (max) (mA) Number of DC-DC Outputs Operating Freq. (kHz) Package Smallest Available Package (max w/pins) (mm2) Price**
    MAX1636  4.5 30 1.1 5.5 2.5
    3.3
    7 7 Preset
    Resistor
    0.4 1 200
    300
    SSOP/20 58 $3.95 @ 1k
    See All Step-Down Switching Regulators (252)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    다이어그램
    MAX1636: Typical Operating Circuit
    일반 동작 회로

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    문서 레퍼런스 19-1268; 개정판 3; 2005-09-26
    이 페이지는 최근에 변경됨: 2007-06-01


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