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AIC2363

3.2A 550K/1.1MHz Synchronous PWM/PSM Step-Down Converter with High Light-load Efficiency

FEATURES
  • 2.5V to 6V Input Voltage Range
  • Adjustable Output Voltage from 0.8V to Vin
  • 3.2A Guaranteed Output Current
  • 88% Efficiency at Heavy Load (Vin=5V, Vout=3.3V, Iout=3.2A)
  • 95% Efficiency at Moderate Load (Vin=5V, Vout=3.3V, Iout=1.5A)
  • 91% Efficiency at Light Load (Vin=5V, Vout=3.3V, Iout=50mA)
  • Low RDS(ON) Internal Switches: 110mOhm
  • No Schottky Diode Required
  • 100% Duty Cycle in Low Dropout Operation
  • Fixed 1MHz Operating Frequency
  • Optional Soft-Start Internal Fixed 1ms Soft-Start (in SOP-8)
APPLICATIONS
  • LCD TV
  • Portable Products
  • Wireless and DSL Modems
  • Solid-State Drives
  • Battery-Operated Devices (1 Li-Ion or 3 NiMH/ NiCd)
DESCRIPTION
The AIC2363 is a low-noise, pulse-widthmodulated (PWM), DC-DC step-down converter.
The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. The AIC2363 is ideally suited for Li-Ion battery applications. Automatic PWM/PSM mode extends battery life and enhance efficiency by switching to a pulse-skippingmodulated mode during light load. Shutdown mode places the device in standby, reducing supply current to under 2uA.
Other features of the AIC2363 include high efficiency for all load range, low dropout voltage, short circuit protection, and over temperature protection.
TYPICAL APPLICATION


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