LTC3618

RECOMMENDED FOR NEW DESIGNS

Dual 4MHz, ±3A Synchronous Buck Converter for DDR Termination

Part Models
10
1ku List Price
Starting From $4.90
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Part Details

  • DDR Power Supply, Termination and Reference
  • High Efficiency: Up to 94%
  • Dual Outputs with ±3A Output Current Capability
  • 2.25V to 5.5V Input Voltage Range
  • ±1% Output Voltage Accuracy
  • VTT Output Voltage Down to 0.5V
  • Shutdown Current ≤1μA
  • VTTR = VDDQIN/2, VFB2 = VTTR
  • Adjustable Switching Frequency Up to 4MHz
  • Internal or External Compensation
  • Selectable 0°/90°/180° Phase Shift Between Channels
  • Internal or External Soft-Start for VDDQ, Internal Soft-Start for VTT
  • Power Good Status Outputs
  • Low Profile 4mm × 4mm QFN-24 and TSSOP-24 Packages
  • AEC-Q100 Qualified for Automotive Applications
LTC3618
Dual 4MHz, ±3A Synchronous Buck Converter for DDR Termination
Efficiency and Power Loss vs Load Current Product Package 1 Product Package 2
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Documentation

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Hardware Ecosystem

Parts Product Life Cycle Description
DDR/QDR Memory Bus Termination 1
LTM4632 RECOMMENDED FOR NEW DESIGNS Ultrathin, Triple Output, Step-Down μModule Regulator for DDR-QDR4 Memory
Digital Power System Managers 1
LTC2974 RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Digital Temperature Sensors 1
LTC2991 RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
Multiple Output Buck Regulators 1
LTC3880 RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Silicon Oscillators 1
LTC6908 Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
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Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

eval board
DC1726A

LTC3618EUF Demo Board | For DDR Termination, 2.25V ≤ VIN ≤ 5.5V, VDDQ = 1.5V/1.8V/2.5V @ ±3A, VTT = 0.5VDDQ @ ±3A, VTTR Current = ±10mA

Product Details

Demonstration circuit 1726 is a dual high efficiency monolithic step-down (buck) DC/DC switching regulator designed for double-data-rate (DDR) memory termination in computer systems. The VDDQ output is capable of sourcing and sinking up to 3A with output voltages of 1.5V, 1.8V, 2.5V plus an optional voltage, selected using jumpers. The VTT output can also source and sink up to 3A with an output voltage equal to half of the VDDQ voltage, half of the input voltage or half of an externally applied voltage, selected using a jumper. An additional low current output (VTTR) equal to the VTT voltage capable of sourcing and sinking up to 10mA is included. Input voltage range is from 2.25V to 5.5V with overvoltage protection for transients exceeding 6.5V.

DC1726A
LTC3618EUF Demo Board | For DDR Termination, 2.25V ≤ VIN ≤ 5.5V, VDDQ = 1.5V/1.8V/2.5V @ ±3A, VTT = 0.5VDDQ @ ±3A, VTTR Current = ±10mA
DC1726A - Schematic

Reference Designs

Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix UltraScale+ Circuits from the lab

Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design

Features and Benefits

  • Xilinx Artix® UltraScale+ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

  • Analog Devices, Inc. supports power delivery solutions for the Artix Ultrascale+ low-cost designs. Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

  • ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

  • For a complete list power designs and use cases, please contact your local FAE.

  • Key Power for full management devices are used as follows:

    • LTC3307A
    • LTC3309A
    • ADP125
    • LTC3617 (Optional DDR)
    • LTC3618
    • ADM1186 (Optional Monitoring & Sequencing)
NOVPED iMX6 QP Dev Kit
NXP NOVPED iMX6 QP Circuits from the lab

NXP iMX6 Platform EVK Hardware Verified Design for IO and Robust Power Supply

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Versal HBM Diagram
Versal HBM Non-Hardware Verified Design Circuits from the lab

Features and Benefits

  • The Versal HBM series features heterogeneous integration of fast memory, secure connectivity, and adaptive compute to eliminate processing and memory bottlenecks for memory-bound, compute-intensive workloads such as machine learning, database acceleration, next-generation firewalls, and advanced network testers. Analog Devices has worked closely AMD to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. For a complete list  power designs and use cases, please contact your local local FAE.
  • ADI has also completed a complete power evaluation report for Mid-High Voltage rails. For a complete report please submit your interest here.

Key power regulators are used for this device as follows:

  • LTC3888-1
  • LTC7051
  • LTC3633A
  • LTC7200S
  • LTC7151S
  • LT8652
  • ADP125
  • LTC3617 (Optional)
  • LTC3618 (Optional)
Artix UltraScale+
Minimum Rails for AU10/15P and AU20/25P - Non-Hardware Verified Design
Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree
Artix US+ Rail Consolidation - Minimum Rails (AU20P/25P) Power Tree
NXP NOVPED iMX6 QP
NXP iMX6 Platform EVK Hardware Verified Design for IO and Robust Power Supply
NOVPED iMX6 QP Dev Kit
NOVPED iMX66 Power Tree
Versal HBM Non-Hardware Verified Design
Versal HBM Diagram

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