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MAX1677评估板

产品详情

主要特征

简化框图

Technical Docs

数据资料 MAX1677评估板 Jan 03, 2001

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主要特征

  • +0.7V to MAINOUT Battery Input Voltage
  • Dual Output Voltages
    • +3.3V Main Output and +20V LCD Bias Output
    • +3.3V Main Output and -20V LCD Bias Output
  • All Outputs Also Adjustable with External Resistors
  • Up to 350mA from 2-Cell Input (Main Output )
  • Up to 140mA from 1-Cell Input (Main Output)
  • Up to 12mA Output Current (LCD Bias Output)
  • Internal N-Channel Switches and Synchronous Rectifier
  • 1µA IC Shutdown Current
  • 300kHz Switching Frequency
  • Surface-Mount Components
  • Fully Assembled and Tested

应用/用途

  • 手持式终端
  • PDA
  • 便携式仪表
  • 便携电话

描述

The MAX1677 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate switching-regulator circuits. The first circuit is configured for a +3.3V main output and +20V LCD bias voltage. It accepts inputs from +0.7V to +3.3V. The main +3.3V output supplies up to 350mA from a 2-cell input, or 140mA from a 1-cell input, while the LCD bias output supplies up to 12mA at +20V.

The second circuit converts a +0.7V to +3.3V battery voltage to a +3.3V main output and a -20V LCD bias voltage. The main +3.3V output supplies up to 350mA from a 2-cell input, or 140mA from a 1-cell input, while the LCD bias output supplies 10mA at -20V.

The MAX1677 features internal N-channel MOSFET switches, a synchronous rectifier, low-battery comparator, and selectable PFM/PWM mode. The MAX1677 EV kit provides low quiescent current and high efficiency—up to 95% for maximum battery life. Operation at 300kHz allows the use of tiny surface-mount inductors.

简化框图

Technical Docs

数据资料 MAX1677评估板 Jan 03, 2001

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