LTC3787
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3787

PolyPhase Synchronous Boost Controller with PassThru

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 24
1ku List Price Starting From $4.23
Features
  • 2-Phase Operation Reduces Required Input and Output Capacitance and Power Supply Induced Noise
  • Synchronous Operation for Highest Efficiency and Reduced Heat Dissipation
  • Wide VIN Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up
  • Output Voltage Up to 60V
  • ±1% 1.200V Reference Voltage
  • RSENSE or Inductor DCR Current Sensing
  • 100% Duty Cycle Capability for Synchronous MOSFET
  • Low Quiescent Current: 135μA
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Power Good Output Voltage Monitor
  • Low Shutdown Current, IQ < 8μA
  • Internal LDO Powers Gate Drive from VBIAS or EXTVCC
  • Thermally Enhanced Low Profile 28-Pin 4mm × 5mm QFN Package and Narrow SSOP Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3787 is a high performance PolyPhase® single output synchronous boost converter controller that drives two N-channel power MOSFET stages out-of-phase. Multiphase operation reduces input and output capacitor requirements and allows the use of smaller inductors than the single-phase equivalent. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, enabling high power boost applications.

A 4.5V to 38V input supply range encompasses a wide range of system architectures and battery chemistries. When biased from the output of the boost converter or another auxiliary supply, the LTC3787 can operate from an input supply as low as 2.5V after start-up. The operating frequency can be set for a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL. PolyPhase operation allows the LTC3787 to be configured for 2-, 3-, 4-, 6- and 12-phase operation.

The SS pin ramps the output voltage during start-up. The PLLIN/MODE pin selects Burst Mode® operation, pulse- skipping mode or forced continuous mode at light loads.

APPLICATIONS

  • Industrial
  • Automotive
  • Medical
  • Military
Part Models 24
1ku List Price Starting From $4.23

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

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Jul 31, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Aug 10, 2022

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC3787EGN#PBF

PRODUCTION

LTC3787EGN#TRPBF

PRODUCTION

LTC3787HGN#PBF

PRODUCTION

LTC3787HGN#TRPBF

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LTC3787HGN#WPBF

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LTC3787IGN#PBF

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LTC3787IGN#TRPBF

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LTC3787IGN#WPBF

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LTC3787IGN#WTRPBF

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LTC3787MPGN#PBF

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LTC3787MPGN#TRPBF

PRODUCTION

Jul 31, 2020

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3787EGN#PBF

PRODUCTION

LTC3787EGN#TRPBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC2001A

LTC3787EUFD Demo Board | LTC3787(x2) Paralleled Boost Controllers, 6V ≤ VIN ≤ 24V, VOUT = 24V @ Up to 30A

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DC2001A

LTC3787EUFD Demo Board | LTC3787(x2) Paralleled Boost Controllers, 6V ≤ VIN ≤ 24V, VOUT = 24V @ Up to 30A

LTC3787EUFD Demo Board | LTC3787(x2) Paralleled Boost Controllers, 6V ≤ VIN ≤ 24V, VOUT = 24V @ Up to 30A

Product Detail

Demonstration circuit 2001A is a step-up DC/DC converter using two LTC3787EUFD dual-phase synchronous boost controllers in a parallel configuration for high current, high power 4-phase operation. The DC2001A has an input supply voltage range from 6V to 24V. The converter provides an output voltage of 24V, with a very high efficiency output of 25A to 30A.


 


reference details image

DC1411A

LTC3787EUFD Demo Board | 5V to 24VIN to 24VOUT at 6A

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DC1411A

LTC3787EUFD Demo Board | 5V to 24VIN to 24VOUT at 6A

LTC3787EUFD Demo Board | 5V to 24VIN to 24VOUT at 6A

Product Detail

Demonstration circuit DC1411 is DC/DC boost converter featuring the LTC3787 constant frequency current mode boost controller. The DC1411A operates over 5V to 24V input and provides 6A to 16A of output current. The 350kHz constant frequency operation results in small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages.

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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