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AIC2802

3A 23V Synchronous PWM Step-Down Converter with Low Dropout Voltage Output

FEATURES
  • 3A Continuous Output Current
  • internal Soft Start
  • Up to 90% Efficiency for Heavy Load (Vin=12V, Vout=3.3V, Iout=3.0A)
  • Low Rds(on) Internal Switches: 150mOhm and 120mOhm
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 93% Efficiency
  • <1μA Supply Current in Shutdown Mode
  • Fixed 340KHz Frequency
  • Thermal Shutdown
  • Cycle by Cycle Over Current Protection
  • Wide 4.5 to 23V Operating Input Range
  • Output Adjustable from 0.925V to 12V
  • Under Voltage Lockout
  • Output Voltage 2 is available from 0.8V~5V Adjustable Version
  • Available in ± 2% Output Tolerance
  • Extra Mosfet to control current of output voltage 2
  • Internal OVP UVLO for Output1 and Output2
APPLICATIONS
  • Networking Systems
  • Distributed Power Systems
  • Pre-Regulator for Linear Regulators
  • LCD TV, LCD Monitor, DPF
  • Portable AV Equipment
  • Note Book PC Applications
  • PC Peripherals
  • Set-top Box
DESCRIPTION
The AIC2802 is a synchronous step-down regulator with an integrated Power MOSFET and extra Power MOSFET to control coutput voltage2. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation.
Current mode operation provides fast transient response and eases loop stabilization. The Output Voltage1 adjusted by R1, R2 and Output Voltage 2 adjusted by R3, R4.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. Internal soft-start reduces the stress on the input source and the output overshoot at turn-on. In shutdown mode, the regulator draws 1uA or less of supply current.
The AIC2802 is available in SOP-8E Package.
TYPICAL APPLICATION


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