LTC3413

PRODUCTION

3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination

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Overview

  • High Efficiency: Up to 90%
  • ±3A Output Current
  • Symmetrical Source and Sink Output Current Limit
  • Low RDS(ON) Internal Switch: 85mΩ
  • No Schottky Diode Required
  • 2.25V to 5.5V Input Voltage Range
  • VOUT = VREF/2
  • ±1% Output Voltage Accuracy
  • Programmable Switching Frequency: Up to 2MHz
  • Power Good Output Voltage Monitor
  • Overtemperature Protected
  • Available in 16-Lead TSSOP Exposed Pad Package

The LTC3413 is a high efficiency monolithic synchronous step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage equal to (0.5)VREF while sourcing or sinking up to 3A of output current. An internal voltage divider reduces component count and eliminates the need for external resistors by dividing the reference voltage in half. The internal synchronous power switch with 85mΩ on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequencies up to 2MHz are set by an external resistor.

Forced-continuous operation in the LTC3413 reduces noise and RF interference. Fault protection is provided by an overcurrent comparator that limits output current during both sourcing and sinking operations. Adjustable compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

Applications

  • Bus Termination: DDR and QDR™ Memory, SSTL, HSTL, ...
  • Notebook Computers
  • Distributed Power Systems
LTC3413
3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination
Figure 1a. High Effi ciency Bus Termination Supply Figure 1b. Efficiency vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3413
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
schematic 1
DC492A

LTC3413EFE | ±3A Monolithic DDR Memory Termination Supply, VIN = 2.25V to 5.5V, VOUT = VREF/2 ±3A

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Product Details

DC492A: Demo Board for the LTC3413 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination.
DC492A
LTC3413EFE | ±3A Monolithic DDR Memory Termination Supply, VIN = 2.25V to 5.5V, VOUT = VREF/2 ±3A
DC492A - Schematic

Reference Designs

View 1
View 1
View 2
LTC Parts List
DK-N2EVAL-3C25N Block Diagram
Altera Nios II Embedded Evaluation Kit, Cyclone III Edition Circuits from the lab

View Detailed Reference Design

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
DK-START-3C25N Kit
DK-START-3C25N Kit
LTC Parts
DK-START-3C25N Block Diagram
Altera Cyclone III FPGA Starter Kit Circuits from the lab

View Detailed Reference Design

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
Altera Nios II Embedded Evaluation Kit, Cyclone III Edition
View 1
View 2
LTC Parts List
DK-N2EVAL-3C25N Block Diagram
Altera Cyclone III FPGA Starter Kit
DK-START-3C25N Kit
LTC Parts
DK-START-3C25N Block Diagram

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