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Maxim产品 - MAX881R介绍
MAX881R - 低噪声偏置电源、µMAX封装,带有电源就绪指示,用于GaAsFET PA

MAX881R是Maxim美信半导体公司的一款电荷泵产品,MAX881R是低噪声偏置电源、µMAX封装,带有电源就绪指示,用于GaAsFET PA,本站介绍了MAX881R的封装应用图解、特点和优点、功能等,并给出了与MAX881R相关的Maxim元器件型号供参考。

MAX881R - 低噪声偏置电源、µMAX封装,带有电源就绪指示,用于GaAsFET PA - 电荷泵 - 1mVP-P输出电压纹波 - 美信半导体


The MAX881R low-noise, inverting power supply is designed for biasing GaAsFET power amplifiers in portable wireless applications. This device is a chargepump inverter followed by a negative linear regulator. The input voltage range is 2.5V to 5.5V. The output is preset at -2.0V or can be set, using two resistors, to any voltage from -0.5V to (-VIN + 0.6V). It can deliver up to 4mA. The internal linear regulator also filters the output to 1mVP-P ripple and noise.

Other features include a power-OK (active-low POK) output that signals when the negative voltage is within 7.5% of its set point. It protects the GaAsFET by not allowing power to be applied to the GaAsFET's drain until it is properly biased. The signal can be routed either to a microcontroller or directly to a switch at the GaAsFET drain. The MAX881R is available in a 10-pin µMAX® package.

  • 以下关键特性由Maxim美信半导体提供:
  • Small µMAX Package
  • 1mVP-P Output Voltage Ripple and Noise
  • Power-OK Signal to Control GaAsFET Drain Switch
  • 0.05µA Logic-Controlled Shutdown
  • 1ms Guaranteed Startup
  • 2.5V to 5.5V Input
  • -0.5V to (-VIN + 0.6V) Output at up to 4mA
  • Operates with One 4.7µF and Three 0.22µF Capacitors (no inductors needed)
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