PM6641
Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications
Features
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0.
8 V ±1 % internal
voltage reference V to 5.
5 V input
voltage range Fast response, constant frequency, current mode control Three independent, adjustable, out-of-phase SMPS for DDR2/3 (VDDQ) and chipset supply Low noise DDR2/3 reference (VTTREF) ±2 Apk LDO for DDR2/3 termination (VTT) with foldback S0-S5 states compliant DDR2/3 section Active soft-end for all outputs Selectable tracking discharge for VDDQ Separate power-good signals Pulse skipping at light load Programmable current limit and soft-start for all outputs Latched OVP, UVP protection Thermal protection VFQFPN-48 7x7
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