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DDR Memory Termination
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2-Phase, Spread Spectrum, DDR Memory Supplies with Ceramic Output Capacitors DDR Memory Power Supply: 2.5V to 5.5Vin, 0.75V@+/-6A Vtt, 0.75V@10mA Vref, 1MHz External Clock DDR Memory Power Supply: 2.5V to 5.5Vin, 1.25V@+/-6A Vtt, 1.25V@10mA Vref, 2.25MHz DDR Memory Power Supply: 3.3Vin, 0.9V@+/-3A Vtt (with 1.8V external reference) DDR メモリ電源： Vin＝3.3V、Vtt＝0.9V/±3A、 Vddq＝1.8V/3A、 Vref＝0.9V/10mA DDR Memory Power Supply: 3.6V to 15Vin, 1.8V@3A Vddq, 0.9V@+/-3A Vtt, 0.9V@10mA Vref DDR Memory Power Supply: 3.6V to 15Vin, VTT Powered from VDDQ DDR Memory Power Supply: 4V to 24Vin, 1.25V@+/-10A Vtt, DDR Memory Power Supply: 5V to 28Vin, 1.5V@+/-10A Vtt (3V external reference) DDR Memory Power Supply: 5Vin, 1.25V@+/-6A Vtt (2.5V external reference) 入力電圧範囲が4.5V～14VのDDR3用1.5V VDDQ/20Aと0.75VTT/±10A
2-Phase, Spread Spectrum, DDR Memory Supplies with Ceramic Output Capacitors
The LTC3776 is a 2-phase dual output synchronous stepdown switching regulator controller for DDR/QDR memory termination applications. The second controller regulates its output voltage to 1/2 VREF while providing symmetrical source and sink output current capability.
