LTC3787

RECOMMENDED FOR NEW DESIGNS

PolyPhase Synchronous Boost Controller with PassThru

Data Sheet (Rev. D) Product Selection Table
Part Models
24
1ku List Price
Starting From $4.23
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Part Details

  • 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
LTC3787
PolyPhase Synchronous Boost Controller with PassThru
LTC3787 Application Circuit LTC3787 Pin Configuration LTC3787 Pin Configuration LTC3787 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LTC3787

LTpowerCAD 2

LTspice

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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
schematic 6
DC2001A

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

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Product Details

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.


 


eval board
schematic 7
schematic 8
schematic 9
schematic 10
schematic 11
schematic 12
schematic 13
DC1411A

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

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Product Details

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.
DC2001A
LTC3787EUFD Demo Board | LTC3787(x2) Paralleled Boost Controllers, 6V ≤ VIN ≤ 24V, VOUT = 24V @ Up to 30A
DC2001A Demo Board DC2001A Demo Board DC2001A Demo Board DC2001A-3 DC2001A Demo Board DC2001A - Schematic
DC1411A
LTC3787EUFD Demo Board | 5V to 24VIN to 24VOUT at 6A
DC1411A Demo Board DC1411A Demo Board DC1411A Demo Board DC1411A Demo Board DC1411A Demo Board DC1411A Demo Board DC1411A - Schematic

Latest Discussions

2 Years Ago
RE: LTC3787 Boost diode spec (Vdrop vs leakage current)
View related discussion on EngineerZone®

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