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AIC2386B

1.0MHz 2A Synchronous Step-Down DC/DC Converter

FEATURES
  • High Efficiency: Up to 96% (@3.3V)
  • 1.0MHz Constant Frequency Operation
  • 2A Output Current
  • No Schottky Diode Required
  • 2.3V to 6.0V Input Voltage Range
  • Output Voltage as Low as 0.6V
  • PFM Mode for High Efficiency in Light Load
  • 100% Duty Cycle in Dropout Operation
  • Low Quiescent Current: 40μA
  • 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
  • PDAs
  • Portable Instruments
  • Digital Still and Video Cameras
  • PC Cards
DESCRIPTION
The AIC2386B is a 1.0MHz constant frequency,
current mode step-down converter. It is ideal for
portable equipment requiring very high current
up to 2A from single-cell Lithium-ion batteries
while still achieving over 90% efficiency during
peak load conditions. The AIC2386B also can
run at 100% duty cycle for low dropout operation,
extending battery life in portable systems while
light load operation provides very low output
ripple for noise sensitive applications. The
AIC2386B can supply up to 2A output load
current at 5V input voltage and the output
voltage can be regulated as low as 0.6V. The
high switching frequency minimizes the size of
external components while keeping switching
losses low. The internal slope compensation
setting allows the device to operate with smaller
inductor values to optimize size and provide
efficient operation. The AIC2386B is offered in
SOT23-5 package, and is available in an
adjustable version.
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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