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低噪声、升压型DC-DC转换器

紧凑的高效boost转换器

产品详情

主要特征

简化框图

Technical Docs

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主要特征

  • 90% Efficiency
  • Adjustable Output from VIN to 12V
  • 1.6A, 0.21Ω, 14V Power MOSFET (MAX1790)
  • 2.4A, 0.15Ω, 14V Power MOSFET (MAX8715)
  • +2.6V to +5.5V Input Range
  • Pin-Selectable 640kHz or 1.2MHz Switching Frequency
  • 0.1µA Shutdown Current
  • Programmable Soft-Start
  • Small 8-Pin µMAX Package

应用/用途

  • 手持式设备
  • LCD显示器
  • PCMCIA卡
  • 便携式应用

描述

The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.21Ω/0.15Ω n-channel MOSFET to provide a highly efficient regulator with fast response.

High switching frequency (640kHz or 1.2MHz selectable) allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small, low equivalent-series-resistance (ESR) ceramic output capacitors. The device can produce an output voltage as high as 12V from an input as low as 2.6V.

Soft-start is programmed with an external capacitor, which sets the input-current ramp rate. In shutdown mode, current consumption is reduced to 0.1µA. The MAX1790/MAX8715 are available in a space-saving 8-pin µMAX® package. The ultra-small package and high switching frequency allow the total solution to be less than 1.1mm high.

简化框图

MAX1790、MAX8715:典型工作电路 MAX1790、MAX8715: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