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LTC3618 - Synchronous Buck Converter

Description

The LTC®3618 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.

Features

  • n DDR Power Supply, Termination and Reference n High Efficiency: Up to 94% n Dual Outputs with ±3A Output Current Capability n 2.25V to 5.5V Input Voltage Range n ±1% Output Voltage Accuracy n VTT Output Voltage Down to 0.5V n Shutdown Current ≤1µA n VTTR = VDDQIN/2, VFB2 = VTTR n Adjustable Switching Frequency Up to 4MHz n Internal or External Compensation n Selectable 0°/90°/180° Phase Shift Between Channels n Internal or External Soft-Start for VDDQ, Internal Soft-Start for VTT n Power Good S.

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Full PDF Text Transcription

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LTC3618 Dual 4MHz, ±3A Synchronous Buck Converter for DDR Termination Features n DDR Power Supply, Termination and Reference n High Efficiency: Up to 94% n Dual Outputs with ±3A Output Current Capability n 2.25V to 5.5V Input Voltage Range n ±1% Output Voltage Accuracy n VTT Output Voltage Down to 0.
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