LTC3618EFE#PBF

LTC3618 is a dual synchronous step-down regulator using a current mode, constant-frequency architecture. It provides a complete DDR solution with an input voltage range from 2.25V to 5.5V. The output of the first step-down regulator offers a high accuracy VDDQ supply. A buffered reference generates VTTR at 50% of VDDQIN and drives loads upto ±10mA. The second regulator generates the DDR termination voltage (VTT) equal to VTTR. Both regulators are capable of delivering ±3A of load current at 1MHz switching frequency. It is widely used in application such as DDR memory, supports DDR, DDR2, and DDR3 standards, tracking supplies etc.

• High efficiency upto 94%
• ±1% output voltage accuracy
• VTT output voltage down to 0.5V
• Shutdown current is ≤1µA maximum
• Synchronization frequency is 0.4MHz to 4MHz
• Internal or external compensation
• Selectable 0°/90°/180° phase shift between channels
• Power good status outputs, internal or external soft-start for VDDQ, internal soft-start for VTT
• Operating temperature is -40°C to 125°C
• Packaging style is 24-lead plastic TSSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party