APW7055

APW7055 Advanced PWM and Linear Power Controller Features Operates from 5V input supply 2 Regulated Voltage are provided General Description The APW7055 provides the power control and protections for two output voltages on M/B DDR applications. It integrates one PWM controller , one source-sink linear controller(LC) for DDR source-sink purpose, as well as the monitor and protection functions into a single package. The PWM controller supplies the VMEM(2.5V) with a standard buck converter. The source-sink linear controller regulates VTT(1.25V) power for DDR Termination. Additional built-in over-voltage protection (OVP) will be started when the VMEM output is above 115% of the internal DAC setting(VDAC) . OVP function will shutdown the upper MOSFET and disable all output voltage . The PWM controller’s over-current function monitors the output current by sensing the voltage drop across the upper MOSFET‘s rDS(ON) , eliminating the need for a current sensing resistor . − Standard Buck Switching Power for VMEM www.DataSheet4U.com (2.5V) − Linear Controller with Source-Sink Regula tion for VTT(1.25V) Simple Single-Loop Control Design − Voltage-Mode PWM Control Excellent Output Voltage Regulation − VMEM Output : VMEM ±1.5% Over Tem-per ature − VTT Output : 1/2 VIN ±25mV Over Temperature Fast Transient Response − Built-in Feedback Compensation − Full 0% to 100% Duty Ratio Over-Voltage and Over-Current Fault Monitors Constant Frequency Operation(200kHz) 16 pi...