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AIC2573

Synchronous Buck DC/DC Controller

FEATURES
  • High Efficiency: Up to 93%
  • Single-Powered N-channel MOSFETs Synchro-nous Driver
  • Wide Input Voltage Operation Range 4.5V to 25V
  • Accurate Internal temperature compensated 0.8V Bandgap Reference Voltage with ±1% precision
  • Fast Transient Response
  • - Duty cycle 0% to 95 %
  • PWM Operation at 300KHz
  • Built-in Soft-Start function
  • Over Voltage Protection with Latch Up
  • Under Voltage Protection at Vout with Latch Up
  • Over Current Protection
  • Package: MSOP-10
APPLICATIONS
  • Information Appliances
  • LCD TV
  • Graphic Card
  • Telecomm Equipments
DESCRIPTION
The AIC2573 is a voltage mode synchronous buck PWM controller that drives external N-channel power MOSFET using a 300kHz fixed frequency architecure. This device is capable of producing an output voltage as low as 0.8V. It uses external divider to adjust output voltage with the exact right line and load regulation.
The AIC2573 provides adjustable overcurrent pro-tection threshold from external component, fixed threshold both undervoltage and overvoltage pro-tection. LDO is built in to provide AIC2573 logic power source, and application circuit just uses one single power supply.
A multifunction pin (COMP) allows external com-pensation for optimum load step response and shutdown. Soft start can also be implemented with this pin to properly sequence supplies.
The AIC2573 is available in space-saving MSOP-10 package
TYPICAL APPLICATION


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