ADP3212, NCP3218, NCP3218G 7-Bit, Programmable, 3-Phase, Mobile CPU Synchronous Buck Controller The APD3212/NCP3218/NCP3218G is a highly efficient, ADP3212, NCP3218, NCP3218G PIN ASSIGNMENT EN BST1 1 PWRGD DRVH1 IMON SW1 SWFB1 CLKEN FBRTN PVCC ADP3212 DRVL1 FB NCP3218 COMP PGND (top view) TRDET DRVL2 VARFREQ SWFB2 VRTT SW2 TTSNS DRVH2 GND BST2 GND VCC EN RPM RT RAMP VARFREQ BST1 UVLO TRDET Oscillator Shutdown DRVH1 TRDET Generator and Bias Driver COMP SW1 Logic VEA Current FB PVCC Balancing + + Circuit DRVL1 REF + CSREF PGND OVP LLINE + BST2 1.55 V SWFB1 DRVH2 SWFB2 SW2 SWFB3 PVCC DRVL2 PH0 Number of PGND Phases PH1 OD3 DAC + 200 mV PWM3 OCP + Shutdown CSREF Delay PSI and PSI DPRSLP DPRSLP Logic + Current Limit Current DAC 300 mV Circuit Current IMON PWRGD Monitor Monitor Start Up PWRGD Open Delay PWRGD Drain CSREF Soft + Transient CSSUM Delay CLKEN CLKEN CSCOMP Open Delay Drain CLKEN Disable ILIM Start Up Delay TTSENSE Thermal Precision Precision FBRTN Throttle Reference Reference VRTT Control VID DAC Soft Start DAC REF Figure 1. Functional Block Diagram