LTC3605
Info: : PRODUCTION
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LTC3605

15V, 5A Synchronous Step-Down Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $5.07
Features
  • High Efficiency: Up to 96%
  • 5A Output Current
  • 4V to 15V VIN Range
  • Integrated Power N-Channel MOSFETs
    (70mΩ Top and 35mΩ Bottom)
  • Adjustable Frequency 800kHz to 4MHz
  • PolyPhase® Operation (Up to 12 Phases)
  • Output Tracking
  • 0.6V ±1% Reference Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Shutdown Mode Draws Less Than 15μA Supply Current
  • Available in 24-Pin (4mm × 4mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3605 is a high efficiency, monolithic synchronous buck regulator using a phase lockable controlled on-time constant frequency, current mode architecture. PolyPhase operation allows multiple LTC3605 regulators to run out of phase while using minimal input and output capacitance. The operating supply voltage range is from 15V down to 4V, making it suitable for dual lithium-ion battery inputs as well as point of load power supply applications from a 12V or 5V rail.

The operating frequency is programmable from 800kHz to 4MHz with an external resistor. The high frequency capability allows the use of small surface mount inductors. For switching noise sensitive applications, it can be externally synchronized from 800kHz to 4MHz. The PHMODE pin allows user control of the phase of the outgoing clock signal. The unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that are operating at high frequency while demanding fast transient response. Two internal phase-lock loops synchronize the internal oscillator to the external clock and also servos the regulator on-time to lock on to either the internal clock or the external clock if it’s present.


  Input Voltage Range
LTC3605 4V to 15V
LTC3605A 4V to 20V

APPLICATIONS

  • Point of Load Power Supply
  • Portable Instruments
  • Distributed Power Systems
  • Battery-Powered Equipment
Part Models 8
1ku List Price Starting From $5.07

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Documentation

Documentation

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

reference details image

DC1215A

LTC3605EUF Demo Board | 4V ≤ VIN ≤ 15V, VOUT = 2.5V/3.3V/5V @ 5A

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DC1215A

LTC3605EUF Demo Board | 4V ≤ VIN ≤ 15V, VOUT = 2.5V/3.3V/5V @ 5A

LTC3605EUF Demo Board | 4V ≤ VIN ≤ 15V, VOUT = 2.5V/3.3V/5V @ 5A

Product Detail

Demonstration circuit 1215 is a step-down converter, using the LTC3605 monolithic synchronous buck regulator. The DC1215A has a maximum input voltage 15V, and is capable of delivering up to 5A of output current at a minimum input voltage of 4V. The output voltage of the DC1215A can be set as low as 0.6V, the reference voltage of the LTC3605.



Tools & Simulations

Tools & Simulations 2

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 7

DK-DEV-5CGXC7NES Dev Kit

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altera-cyclone-v-gx-development-kit-discontinued

altera-cyclone-v-gx-development-kit-discontinued

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
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link
DK-DEV-5CGTD9N Dev Kit

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altera-cyclone-v-gt-fpga-development-kit

altera-cyclone-v-gt-fpga-development-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link
DC934A Demo Board for DK-DEV-5CSXC6N

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altera-cyclone-v-soc-development-kit-and-soc-embedded-design-suite

altera-cyclone-v-soc-development-kit-and-soc-embedded-design-suite

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link
DE1-SoC Dev Kit

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terasic-de1-soc-development-kit

terasic-de1-soc-development-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link
C5G Starter Kit

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terasic-c5g-cyclone-v-gx-starter-kit

terasic-c5g-cyclone-v-gx-starter-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link
Arria V SoC Development Kit

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altera-arria-v-soc-development-kit-and-soc-embedded-design-suite

altera-arria-v-soc-development-kit-and-soc-embedded-design-suite

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link
DK-START-5AGXB3N Starter Kit

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altera-arria-v-gx-starter-kit

altera-arria-v-gx-starter-kit

Circuits from the lab

tooltip Info:Circuits from the lab

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
View Detailed Reference Design external link

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