LTC3864
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LTC3864

60V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 20
1ku List Price Starting From $2.49
Features
  • Wide Operating VIN Range: 3.5V to 60V
  • Wide VOUT Range: 0.8V to VIN
  • Low Operating IQ = 40μA
  • Very Low Dropout Operation: 100% Duty Cycle
  • Strong High Voltage MOSFET Gate Driver
  • Constant Frequency Current Mode Architecture
  • Verified FMEA for Adjacent Pin Open/Short
  • Selectable High Efficiency Burst Mode® Operation or Pulse-Skipping Mode at Light Loads
  • Programmable Fixed Frequency: 50kHz to 850kHz
  • Phase-Lockable Frequency: 75kHz to 750kHz
  • Accurate Current Limit
  • Programmable Soft-Start or Voltage Tracking
  • Internal Soft-Start Guarantees Smooth Start-Up
  • Power Good Output Voltage Monitor
  • Low Shutdown IQ = 7μA
  • Available in Small 12-Pin Thermally Enhanced MSOP and DFN Packages
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3864 is a robust, high voltage step-down DC/DC controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET switch allowing 100% duty cycle operation. The wide input and output voltage ranges cover a multitude of applications. This device has been verified with the failure mode and effects analysis (FMEA) procedure for operation during failure conditions.

The LTC3864 offers excellent light load efficiency, drawing only 40μA quiescent current in a user programmable Burst Mode operation. Its peak current mode, constant frequency PWM architecture provides for good control of switching frequency and output current limit. The switching frequency can be programmed from 50kHz to 850kHz with an external resistor and can be synchronized to an external clock from 75kHz to 750kHz.

The LTC3864 offers programmable soft-start or output tracking. Safety features include overvoltage protection, overcurrent and short-circuit protection including frequency foldback and a power good output signal.

The LTC3864 is available in thermally enhanced 12-Pin MSOP and 3mm × 4mm DFN packages.

APPLICATIONS

  • Industrial and Automotive Power Supplies
  • Telecom Power Supplies
  • Distributed Power Systems
Part Models 20
1ku List Price Starting From $2.49

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Documentation

Documentation

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

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Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

Jun 21, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Feb 4, 2020

- 20_0129

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

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Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3864HMSE#PBF

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Filter by Model

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Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

Jun 21, 2022

- 22_0050

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Feb 4, 2020

- 20_0129

arrow down

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3864EMSE#PBF

PRODUCTION

LTC3864EMSE#TRPBF

PRODUCTION

LTC3864HMSE#PBF

PRODUCTION

LTC3864HMSE#TRPBF

PRODUCTION

LTC3864IMSE#PBF

PRODUCTION

LTC3864IMSE#TRPBF

PRODUCTION

LTC3864MPMSE#PBF

PRODUCTION

LTC3864MPMSE#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC3864HMSE#PBF

PRODUCTION

LTC3864HMSE#TRPBF

PRODUCTION

LTC3864IMSE#PBF

PRODUCTION

LTC3864IMSE#TRPBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC1722A

LTC3864EMSE Demo Board | 5.5V ≤ VIN ≤ 55V; VOUT = 5V @ 2A

reference details image

DC2434A

LTC3864 Demo Board | Buck Controller, 12V ≤ VIN ≤ 60V, VOUT = 12V @ 5A

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DC2434A

LTC3864 Demo Board | Buck Controller, 12V ≤ VIN ≤ 60V, VOUT = 12V @ 5A

LTC3864 Demo Board | Buck Controller, 12V ≤ VIN ≤ 60V, VOUT = 12V @ 5A

Product Detail

Demonstration circuit 2434A is a high voltage, current mode DC/DC step-down converter featuring the LTC3864.


The board operates from an input range of 6V to 60V and provides a 12V, 5A output when the input exceeds 12V. The PMOSFET architecture allows it to operate seamlessly up to 100% duty cycle and function as a saturated switch below the regulation threshold, down to 6VIN. It operates at 200kHz and may be synchronized to an external clock. A soft-start feature controls output voltage slew rate at start-up, reducing current surge and voltage overshoot. Burst Mode® operation that improves efficiency at light loads can be enabled with a jumper. A power good output signal is provided.


 


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.

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