LTC3866
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3866

Current Mode Synchronous Controller for Sub Milliohm DCR Sensing

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.26
Features
  • Sub Milliohm DCR Current Sensing
  • High Efficiency: Up to 95%
  • Selectable Current Sensing Limit
  • Programmable DCR Temperature Compensation
  • Die Overtemperature Thermal Shutdown
  • ± 0.5% 0.6V Output Voltage Accuracy
  • Programmable Fixed Frequency 250kHz to 770kHz
  • High Speed Differential Remote Sense Amplifier
  • Wide Input Voltage Range: 4.5V to 38V
  • Output Voltage Range: 0.6V to 3.5V with Diffamp
  • Adjustable Soft-Start or Output Voltage Tracking
  • Foldback Output Current Limit
  • Short-Circuit Soft Recovery
  • Output Overvoltage Protection
  • 24-Lead (4mm × 4mm) QFN and 24-Lead FE Packages
Additional Details
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The LTC3866 is a single phase current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET switches. It employs a unique architecture which enhances the signal-to-noise ratio of the current sense signal, allowing the use of a very low DC resistance power inductor to maximize the efficiency in high current applications. This feature also reduces the switching jitter commonly found in low DCR applications. The LTC3866 also includes a high speed remote sense differential amplifier, a programmable current sense limit that can be selected to 10mV, 15mV, 20mV, 25mV or 30mV, and DCR temperature compensation to limit the maximum output current precisely over temperature.

The LTC3866 also features a precise 0.6V reference with a guaranteed limit of ±0.5% that provides an accurate output voltage from 0.6V to 3.5V. A 4.5V to 38V input voltage range allows it to support a wide variety of bus voltages and various types of batteries.

The LTC3866 is offered in a low profile 24-lead 4mm × 4mm QFN and 24-lead exposed pad FE packages.

Applications

  • Computer Systems
  • Telecom Systems
  • Industrial and Medical Instruments
  • DC Power Distribution Systems
Part Models 8
1ku List Price Starting From $3.26

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3866EFE#PBF

PRODUCTION

LTC3866EFE#TRPBF

PRODUCTION

LTC3866IFE#PBF

PRODUCTION

LTC3866IFE#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3866EUF#PBF

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LTC3866EUF#TRPBF

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LTC3866IUF#PBF

PRODUCTION

LTC3866IUF#TRPBF

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC3866EFE#PBF

PRODUCTION

LTC3866EFE#TRPBF

PRODUCTION

LTC3866IFE#PBF

PRODUCTION

LTC3866IFE#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3866EUF#PBF

PRODUCTION

LTC3866EUF#TRPBF

PRODUCTION

LTC3866IUF#PBF

PRODUCTION

LTC3866IUF#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1829A

LTC3866EUF Demo Board VIN = 4.5V to 14V, VOUT = 1.5V @ 30A

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DC1829A

LTC3866EUF Demo Board VIN = 4.5V to 14V, VOUT = 1.5V @ 30A

LTC3866EUF Demo Board VIN = 4.5V to 14V, VOUT = 1.5V @ 30A

Product Detail

Demonstration circuit 1829A is a high efficiency, high density, synchronous buck converter with 4.5V to 14V input voltage range. It can supply a 30A maximum load current with a 1.5V output. This demo board utilizes the LTC3866EUF, a feature-rich single phase synchronous buck controller with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing. This board is setup with 0.32mΩ DCR inductor. The temperature compensation function guarantees accurate current limit over a wide temperature range with DCR sensing. The LTC3866 is suitable for operation from an input voltage of 4.5V to 38V and output voltages up to 3.5V.

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 1

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

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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

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