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AIC2354B

1.5MHz 1A Synchronous Step-Down DC/DC Converter

FEATURES
  • High Efficiency: Up to 96%(@3.3V)
  • 1.5MHz Constant Frequency Operation
  • 1.0A Output Current
  • No Schottky Diode Required
  • 2.5V to 5.5V Input Voltage Range
  • Output Voltage as Low as 0.6V
  • 100% Duty Cycle in Dropout
  • Low Quiescent Current: 50μA
  • Slope Compensated Current Mode Control
  • for Excellent Line and Load Transient
  • Response
  • Short Circuit Protection
  • Thermal Fault Protection
  • Inrush Current Limit and Soft Start
  • Input Over Voltage Protection(OVP)
  • <1μA Shutdown Current
  • SOT23-5 Package
APPLICATIONS
  • Cellular and Smart Phones
  • Wireless and DSL Modems
  • PDA/MID/PAD
  • Digital Still and Video Cameras
DESCRIPTION
The AIC2354B is a constant frequency, current
mode PWM step-down converter. The device
integrates a main switch and a synchronous
rectifier for high efficiency without an external
Schottky diode. It is ideal for powering portable
equipment that runs from a single cell Lithium-
Ion (Li+) battery. The output voltage can be
regulated as low as 0.6V. The AIC2354B can
also run at 100% duty cycle for low dropout
operation, extending battery life in portable
system. This device offers two operation modes,
PWM control and PFM Mode switching control,
which allows a high efficiency over the wider
range of the load.
TYPICAL APPLICATION


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