AME5286

AME AME5286 3A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter n General Description n Typical Application The AME5286 is a Synchronous Rectified Step-Down Converter with internal power MOSFETs. It achieves 3A continuous output current over a wide switching frequency range with excellent load and line regulation. Current mode operation provides fast transient response and eases of loop stabilization. The circuit protection includes cycle-by-cycle current limiting, output short circuit frequency protection and thermal shutdown. In shutdown mode, the regulator reduces the current less than 1µA of supply current. V IN 5V CIN 10µF P.G C2 Optional IN SW R4 100KΩ AME5286 PGOOD EN OFF ON FB SS COMP FREQ C1 680pF GND R3 25KΩ RFREQ 18KΩ L 2.2µH R1 75KΩ C3 0.1µF VOUT 3.3V COUT 22µF R2 24KΩ This device is available in SOP-8/PP and DFN-8C package with exposed pad for low thermal resistance. n Features l 3A Output Current l External Soft Start l Stable with Low ESR Output Ceramic Capacitors l Up to 95% Efficiency l Less than 1µA Shutdown Current l Wide Switching Frequency Range from 300KHz~2MHz l Thermal Shutdown l Cycle by Cycle Over Current Protection l Output Adjustable from 0.8V to VIN l Short Circuit Protection l Available in SOP-8, DFN-8C Package l RoHS Compliant and Halogen Free Figure 1. 3.3V at 3A Step-Down Regulators L VIN 1.5µH 5V IN SW CIN 10µF R4 100KΩ AME5286 PGOOD FB EN P.G OFF ON SS COMP FREQ C2 Optional C1 680pF GND R3 8.2KΩ RFREQ ...