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Monolithic VR for Chipset and DDR2/3 Supply for Ultra-Mobile PC (UMPC) Applications

Quantity $ per Unit Savings
1 - 9$6.640%
10 - 24$5.9710%
25 - 99$5.6415%
100 - 249$4.8926%
250 - 499$4.6430%
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In stock
Parameter NameParameter Value
Input Voltage Min Volt2.7
Input Voltage Max Volt5.5
Packing TypeTape And Reel
RoHs compliantEcopack2
Package NameVFQFPN 48 7x7x1.0 mm

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.

Key features
  • Separate Power Good signals
  • Selectable tracking discharge for VDDQ
  • Programmable current limit and soft-start for all outputs
  • Pulse skipping at light load
  • Thermal protection
  • Latched OVP, UVP protection
  • S0-S5 states compliant DDR2/3 section
  • ±2 Apk LDO for DDR2/3 termination (VTT) with foldback
  • 0.8 V ±1% internal voltage reference
  • Fast response, constant frequency, current mode control
  • 2.7 V to 5.5 V input voltage range
  • Low noise DDR2/3 reference (VTTREF)
  • Active soft-end for all outputs
  • Three independent, adjustable, out-of-phase SMPS for DDR2/3 (VDDQ) and chipset supply