MAX1677EVKIT

MAX1677评估板


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说明

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.

关键特性

  • +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

  • 手持式终端
  • PDA
  • 便携式仪表
  • 便携电话
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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