SC486: Complete DDR1/2 Memory Power Supply

• Constant on-time controller for fast dynamic response on VDDQ
• Programmable VDDQ range: 1.5 V to 3 V
• 1% internal reference (2% system accuracy)
• Resistor programmable on time for VDDQ
• VCCA/VDDP range = 4.5 V to 5.5 V
• VBAT range = 2.5 V to 25 V
• VDDQ DC current sense using low-side R_DS(ON) sensing or external R_SENSE in series with low-side FET
• Cycle-by-cycle current limit for VDDQ
• Digital soft start for VDDQ
• Combined EN and PSAVE pin for VDDQ
• Over-voltage/under-voltage fault protection for both outputs and PGD output (VDDQ only)
• Separate VCCA and VDDP supplies
• VTT/REF range = 0.75 V – 1.5 V
• VTT source/sink 3 A peak
• Internal resistor divider for VTT/REF
• VTT is high impedance in S3
• VDDQ, VTT, and REF are actively discharged in S4/S5
• 24-pin MLPQ (4 x 4mm) Lead-free package, fully
  WEEE and RoHS compliant
  

Typical Application Circuit

Click diagram to enlarge

• Notebook computers
• CPU I/O supplies
• Handheld terminals and PDAs
• LCD monitors
• Network power supplies

MLPQ-24

• SC486IMLTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only