SC1480A: DDR and DDR Memory VTT Power Supply Controller

• Compatible with DDR & DDR2 memory power requirements
• Constant on-time for fast dynamic response
• Programmable VOUT based on external reference
• VIN range = 1.8 V – 25 V
• DC current sense using low-side RDS(ON) sensing or sense resistor
• 3 mA reference output buffer
• Low-power S3 state
• Resistor-programmable frequency
• Cycle-by-cycle current limit
• Digital soft start
• Output current source-sink capability
• Over-voltage/under-voltage fault protection and PGOOD output
• Under 10 µA typical shutdown current
• Low quiescent power dissipation
• 14-lead TSSOP package
• Industrial temperature range
• Integrated gate drivers with soft switching
• Efficiency >80%

Typical Application Circuit

Click diagram to enlarge

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

TSSOP-14

• SC1480AITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only