LTC3784
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3784

60V PolyPhase Synchronous Boost Controller with PassThru

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Models 20
1ku List Price Starting From $4.49
Features
  • PolyPhase® 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 60V (65V Abs Max); Operates Down to 2.3V 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: 28μA
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Power Good Output Voltage Monitor
  • Low Shutdown Current, IQ < 4μA
  • 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 LTC3784 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, simplifying high power boost applications.

A 4.5V to 60V 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 LTC3784 can operate from an input supply as low as 2.3V after start-up. The operating frequency can be set within a 50kHz to 900kHz range or synchronized to an external clock using the internal PLL. PolyPhase operation allows the LTC3784 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 20
1ku List Price Starting From $4.49

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Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Oct 3, 2024

- 24_0235

(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

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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

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Filter by Model

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Part Models

Product Lifecycle

PCN

Oct 3, 2024

- 24_0235

arrow down

(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

LTC3784EGN#PBF

PRODUCTION

LTC3784EGN#TRPBF

PRODUCTION

LTC3784HGN#PBF

PRODUCTION

LTC3784HGN#TRPBF

PRODUCTION

LTC3784IGN#PBF

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LTC3784IGN#TRPBF

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LTC3784MPGN#PBF

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LTC3784MPGN#TRPBF

PRODUCTION

Aug 10, 2022

- 22_0177

arrow down

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

LTC3784EGN#PBF

PRODUCTION

LTC3784EGN#TRPBF

PRODUCTION

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LTC3784HGN#WTRPBF

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LTC3784IGN#TRPBF

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Software & Part Ecosystem

Evaluation Kits 1

reference details image

DC2061A

LTC3784IUFD Demo Board | 6V ≤ VIN ≤ 60V; VOUT = 48V @ 3A to 12A

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DC2061A

LTC3784IUFD Demo Board | 6V ≤ VIN ≤ 60V; VOUT = 48V @ 3A to 12A

LTC3784IUFD Demo Board | 6V ≤ VIN ≤ 60V; VOUT = 48V @ 3A to 12A

Product Detail

Demonstration circuit DC2061 is a 2-phase DC/DC synchronous boost converter featuring the LTC3784 constant frequency current mode synchronous boost controller. The DC2061A operates over a 6V to 60V input, develops a 48V output and provides 3A to 12A of output current as shown in Figure 3. The 150kHz (2 • 150kHz at the output) constant frequency operation results in a small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over wide load range with no minimum load requirement.

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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