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Analog:AIC1880 - Low Noise, Step-Up PWM DC/DC Converter

发布时间：2007-08-02 浏览：5087次
FEATURES
  • 90% High Efficiency
  • 1.6A, 0.3Ohm, 12V Internal Power MOSFET
  • 640kHz/1.2MHz Pin-Selectable Operation Frequency
  • 2.6V to 5.5V Input Range
  • Low Shutdown Current: 0.1mA
  • Programmable Soft-Start
  • External Compensation Network
  • Adjustable Output from VIN to 11V
  • Thin 8-Pin MSOP Package
APPLICATIONS
  • TFT Bias Supplies
  • Handheld Devices
  • PCMCIA Cards
  • Portable Equipment
The AIC1880 is a step-up DC/DC converter with a 1.6A, 0.3Ohm internal power switch. A soft-start pro-grammed with an external capacitor sets the input current ramp rate. Pin-selectable high switching frequency (640kHz or 1.2MHz) allows easy filter-ing and low noises. An external compensation pin gives users flexibility in setting frequency com-pensation, which makes it feasible to use the small, low ESR ceramic output capacitors. The AIC1880 converts input ranging 2.6V to 5.5V into output voltage up to 11V. The device is available in a low profile 8-lead MSOP package.
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