SC1486A数据手册Semtech中文资料规格书

描述 Description

Not Recommended for New Designs - Last Day of purchase: 5/1/11

特性 Features

• 1% DC accuracy
• Compatible with DDR1, DDR2 and DDR3 memory power requirements
• Constant on-time for fast dynamic response
• VBAT range = 1.8V – 25V
• DC current sense using low-side RDS(ON) sensing or sense resistor
• Integrated reference buffer for VTT
• Low power S3 state with high-Z VTT
• Resistor programmable on-time
• Cycle-by-cycle current limit
• Digital soft-start
• PSAVE option for VDDQ
• Over-voltage/under-voltage fault protection
• <20μA shutdown current
• Low quiescent power dissipation
• Two Power Good indicators
• Separate enable for each switcher
• Integrated gate drivers with soft switching - no gate resistors required
• Efficiency >90%
• 28 Lead TSSOP (Lead-free available, fully WEEE and RoHS compliant)

应用 Application

·Notebook computers

·CPU I/O supplies

·Handheld terminals and PDAs