Monolithic Voltage Regulator 48-Pin VFQFPN EP T/R

The PM6641 is a monolithic voltage regulator module specifically designed to supply DDR2/3 memory and chipset in ultra-mobile PC and real estate constrained portable systems.It integrates three independent, adjustable, constant frequency buck converters, a ±2 Apk low drop-out (LDO) linear regulator and a ±15 mA low noise buffered reference.Each regulator provides basic UV and OV protections, programmable soft-start and current limit and active soft-end.Pulse-skipping technique is performed to increase efficiency at very light load.

0.8 V ±1% internal voltage reference

2.7 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