32V, 6A Monolithic Synchronous Step-Down DC/DC Converter

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Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $8.40
  • 6A Output Current
  • Wide VIN Range = 4V to 32V (36V Maximum)
  • Internal N-Channel MOSFETs
  • True Current Mode Control
  • Optimized for High Step-Down Ratios
  • tON(MIN) ≤ 100ns
  • Extremely Fast Transient Response
  • Stable with Ceramic COUT
  • ±1% 0.6V Voltage Reference
  • Power Good Output Voltage Monitor
  • Adjustable On-Time/Switching Frequency
  • Adjustable Current Limit
  • Programmable Soft-Start
  • Output Overvoltage Protection
  • Optional Short-Circuit Shutdown Timer
  • Low Shutdown IQ: 15μA
  • Available in a 7mm × 8mm 52-Pin QFN Package
Additional Details
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The LTC3609 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 6A output current from a 4V to 32V (36V maximum) input supply. It uses a valley current control architecture to deliver very low duty cycle operation at high frequency with excellent transient response. The operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.

The LTC3609 can be configured for discontinuous or forced continuous operation at light load. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads.

Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and an optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit is user programmable. A power good output voltage monitor indicates when the output is in regulation. The LTC3609 is available in a compact 7mm × 8mm QFN package.


  • Point of Load Regulation
  • Distributed Power Systems
Part Models 4
1ku List Price Starting From $8.40

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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LTC3609EWKG Demo Board | Monolithic, 5V ≤ VIN ≤ 28V, VOUT = 1.5V/1.8V/2.5V/3.3V @ 6A



LTC3609EWKG Demo Board | Monolithic, 5V ≤ VIN ≤ 28V, VOUT = 1.5V/1.8V/2.5V/3.3V @ 6A

LTC3609EWKG Demo Board | Monolithic, 5V ≤ VIN ≤ 28V, VOUT = 1.5V/1.8V/2.5V/3.3V @ 6A

Product Detail

Demonstration circuit 1320 is a high power density step-down DC/DC converter featuring the LTC3608EWKG (DC1320A-A) or the LTC3609EWKG (DC1320A-B) high current, high input voltage monolithic DC/DC step-down converter. The input voltage of the DC1320A-B is from 5V to 28V and it provides a jumper-selectable output voltage of 1.5V, 1.8V, 2.5V, or 3.3V @ 6A.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Reference Designs

Reference Designs 1

Terasic DE2i-150 Cyclone IV Board

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Circuits from the lab

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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
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