APW7046 Datasheet | Anpec Electronics Coropration

Dual Advanced PWM and Source-Sink Linear Controller Features - 3 Regulated Voltages are provided General Description The APW7046 provides the power controls and protections for three output voltages on AGP/PCI Graphic Card applications. It integrates two PWM controllers , one SOURCE-SINK linear controller, as well as the monitor and protection functions into a single package. One PWM converter (PWM1) supplies the VCORE(1.5V) for the GPU with a standard buck converter. The other standard buck converter (PWM2) regulates the VMEM(2.5V) for the power of DDR memory. The SOURCE-SINK linear controller control two external MOSFETs to be a linear regulator with the capability of sourcing and sinking current. It regulates the VTT (1.25V) power for DDR Termination voltage. Additional built-in over-voltage protection (OVP) will be started when the VCORE or VMEM output is above 115% of each DAC setting (VCORE and VMEM). OVP function will shutdown the all output voltages until re-powering on the IC. For each PWM converter, the over-current function monitors the output current by sensing the voltage drop across the MOSFET‘s r DS(ON) , eliminating the need for a current sensing resistor. - Standard Buck Converter for VCORE (1.15~1.50V) .. - Standard Buck Converter for VMEM (2.40~3.15V) - Linear Controller with SOURCE-SINK Regulation for VTT(1.25V) - - Simple Single-Loop Control Design - Voltage-Mode PWM Control Excellent Output Voltage Regulation - VCORE Output : ±1% Over Temperature - VMEM Output : ±1.5% Over Temperature - VTT Output : 1/2 VIN ±25m V Over Temperature Min. VIN = 1.7V - Fast Transient Response - Built-in Feedback pensation - Full 0% to 100% Duty Ratio - - - Over-Voltage and Over-Current Fault Monitor Constant Frequency Operation(200k Hz) 24 pins, SOIC Package Pin Description 1 24 BOOT 23 UGATE 2 22 PHASE2 21 PG ND 20 MEM2 19 MEM1 18 MEM0 17 CORE2 16 CORE1 15 CORE0 14 OCSET2 13 VSE N2 UGATE 1 2 Applications - - - M/B DDR...