LTC3413 - 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination


  • High Efficiency: Up to 90%
  • ±3A Output Current
  • Symmetrical Source and Sink Output Current Limit
  • Low RDS(ON) Internal Switch: 85mOhm
  • 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

Typical Application

LTC3413 Typical Application
LTC3413 Typical Application


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 85mOhm 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.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3413EFE#PBF TSSOP-16 FE E 05-08-1663 (BA) Yes
LTC3413EFE#TRPBF TSSOP-16 FE E 05-08-1663 (BA) Yes
LTC3413IFE#PBF TSSOP-16 FE I 05-08-1663 (BA) Yes
LTC3413IFE#TRPBF TSSOP-16 FE I 05-08-1663 (BA) Yes

LTC3413 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3413EFE#PBF TSSOP-16 E $5.72 $3.95 Yes
LTC3413EFE#TRPBF TSSOP-16 E $4.07 Yes
LTC3413IFE#PBF TSSOP-16 I $6.21 $4.35 Yes
LTC3413IFE#TRPBF TSSOP-16 I $4.41 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC492A LTC3413EFE | +/- 3A Monolithic DDR Memory Termination Supply, Vin = 2.25V-5.5V, Vout = Vref/2 +/- 3A Contact Factory
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  • Bus Termination: DDR and QDR™ Memory, SSTL, HSTL, ...
  • Notebook Computers
  • Distributed Power Systems

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Design Tools


LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:


The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

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