Analog Intergrations Corporation AIC2863
3A 23V Synchronous PWM/PSM Step-Down Converter
FEATURES
● 3A Continuous Output Current● Wide 4.75V to 23V Operating Input Range
● Ouput Adjustable from 0.925V to 12V (VREF=0.925V Version)
● Ouput Adjustable from 0.8V to 12V (VREF=0.8V Version)
● Up to 84% Efficiency for Heavy Load (Vin=12V, Vout=3.3V, Iout=3.0A)
● Up to 91% Efficiency for Moderate Load (Vin=12V, Vout=3.3V, Iout=1.0A)
● Low Rds(on) Internal Switches: 100mΩ and 85mΩ
● <3µA Supply Current in Shutdown Mode
● 340KHz/550KHz Frequency
● Programmable Soft Start
● Thermal Shutdown
● Cycle by Cycle Over Current Protection
● Under Voltage Lockout
● Short Circuit Protection
● Over Voltage Protection
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APPLICATIONS
● Networking Systems such as Modems & Routers● Distributed Power Systems
● Pre-Regulator for Linear Regulators
● Set-top Box
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TYPICAL APPLICATIONS
CIRCUIT●
DESCRIPTION
The AIC2863 is a 3A synchronous-rectified Buck converter with integrated low Rds(on) power MOSFETs. The AIC2863, designed with a currentmode control scheme, can convert wide input voltage to the adjustable output voltage to provide excellent output voltage regulation.