LTC3863
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3863

60V Low IQ Inverting DC/DC Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 16
1ku List Price Starting From $2.49
Features
  • Wide Operating VIN Range: 3.5V to 60V
  • Wide Negative VOUT Range: –0.4V to Beyond –150V
  • Low Operating IQ = 70µA
  • 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
  • Low Shutdown IQ = 7µA
  • Available in Small 12-Lead Thermally Enhanced MSOP and DFN Packages
Additional Details
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The LTC3863 is a robust, inverting DC/DC PMOS controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET to generate a negative output and requires just a single inductor to complete the circuit. Output voltages from –0.4V to –150V are typically achievable with higher voltages possible, only limited by external components.

The LTC3863 offers excellent light load efficiency, drawing only 70μA 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 LTC3863 offers programmable soft-start or output tracking. Safety features include overvoltage, overcurrent and short-circuit protection including frequency foldback.

The LTC3863 is available in thermally enhanced 12-lead MSOP and 3mm × 4mm DFN packages.

Applications

  • Industrial and Automotive Power Supplies
  • Telecom Power Supplies
  • Distributed Power Systems
Part Models 16
1ku List Price Starting From $2.49

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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

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Jun 5, 2024

- 24_0003

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

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Feb 4, 2020

- 20_0129

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

LTC3863EMSE#PBF

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

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

LTC3863EMSE#PBF

PRODUCTION

LTC3863EMSE#TRPBF

PRODUCTION

LTC3863HMSE#PBF

PRODUCTION

LTC3863HMSE#TRPBF

PRODUCTION

LTC3863IMSE#PBF

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LTC3863IMSE#TRPBF

PRODUCTION

LTC3863MPMSE#PBF

PRODUCTION

LTC3863MPMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0129

arrow down

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

LTC3863EMSE#PBF

PRODUCTION

LTC3863EMSE#TRPBF

PRODUCTION

LTC3863HMSE#PBF

PRODUCTION

LTC3863HMSE#TRPBF

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LTC3863IMSE#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1737A

LTC3863EMSE Demo Board | 4.5V-16V; VOUT = -5.2V @ 1.7A or -12V @ 1A

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DC1737A

LTC3863EMSE Demo Board | 4.5V-16V; VOUT = -5.2V @ 1.7A or -12V @ 1A

LTC3863EMSE Demo Board | 4.5V-16V; VOUT = -5.2V @ 1.7A or -12V @ 1A

Product Detail

Demonstration circuit 1737A is a current-mode inverting DC/DC converter featuring the LTC3863. The board operates from an input range of 4.5V to 16V, and provides a –5.2V, 1.7A output or a –12V, 1A output (jumper selectable). It operates at 400kHz 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. The demonstration board has options for larger MOSFET and diode packages on the back of the board for higher output current requirements.

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.

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