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AIC1638

1-Cell, 3-Pin, Step-Up DC/DC Converter

FEATURES
  • A Guaranteed Start-Up from less than 0.9 V.
  • High Efficiency.
  • Low Quiescent Current.
  • Less Number of External Components needed.
  • Low Ripple and Low Noise.
  • Fixed Output Voltage: 2.7V, 3.0V, 3.3V, 4.5V and 5V.
  • Space Saving Packages: SOT23-3, SOT89-3 and TO92-3.
APPLICATIONS
  • Pagers.
  • Cameras.
  • Wireless Microphones.
  • Pocket Organizers.
  • Battery Backup Suppliers.
  • Portable Instruments.
DESCRIPTION
The AIC1638 is a high efficiency step-up DC/DC converter for applications using 1 to 4 NiMH battery cells. Only three external components are required to deliver a fixed output voltage of 2.7V, 3.0V, 3.3V, 4.5V or 5V. The AIC1638 starts up from less than 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode.
The PFM control circuit operating in 100KHz (max.) switching rate results in smaller passive components. The space saving SOT23-3, SOT89-3 and TO92-3 packages make the AIC1638 an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones.
TYPICAL APPLICATION


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