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低电压、高精度降压型控制器,用于便携式CPU电源

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主要特征

简化框图

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主要特征

  • ±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

应用/用途

  • 总线端接电源
  • 计算机:台式机、工作站和服务器
  • 笔记本电脑
  • 亚笔记本电脑

描述

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.

简化框图

MAX1636:典型工作电路 MAX1636:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心