LTC3787
RECOMMENDED FOR NEW DESIGNSPolyPhase Synchronous Boost Controller with PassThru
- Part Models
- 24
- 1ku List Price
- Starting From $5.35
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Models | Product Lifecycle | PCN |
|---|---|---|
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Jan 23, 2025 - 24_0282 Addition of Analog Devices Camas, WA Fab for LTC3787 |
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| LTC3787EGN#PBF | PRODUCTION | |
| LTC3787EGN#TRPBF | PRODUCTION | |
| LTC3787EUFD#PBF | PRODUCTION | |
| LTC3787EUFD#TRPBF | PRODUCTION | |
| LTC3787HGN#PBF | PRODUCTION | |
| LTC3787HGN#TRPBF | PRODUCTION | |
| LTC3787HGN#WPBF | PRODUCTION | |
| LTC3787HGN#WTRPBF | PRODUCTION | |
| LTC3787HUFD#PBF | PRODUCTION | |
| LTC3787HUFD#TRPBF | PRODUCTION | |
| LTC3787HUFD#WPBF | PRODUCTION | |
| LTC3787HUFD#WTRPBF | PRODUCTION | |
| LTC3787IGN#PBF | PRODUCTION | |
| LTC3787IGN#TRPBF | PRODUCTION | |
| LTC3787IGN#WPBF | PRODUCTION | |
| LTC3787IGN#WTRPBF | PRODUCTION | |
| LTC3787IUFD#PBF | PRODUCTION | |
| LTC3787IUFD#TRPBF | PRODUCTION | |
| LTC3787IUFD#WPBF | PRODUCTION | |
| LTC3787IUFD#WTRPBF | PRODUCTION | |
| LTC3787MPGN#PBF | PRODUCTION | |
| LTC3787MPGN#TRPBF | PRODUCTION | |
| LTC3787MPUFD#PBF | PRODUCTION | |
| LTC3787MPUFD#TRPBF | PRODUCTION | |
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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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| LTC3787EGN#PBF | PRODUCTION | |
| LTC3787EGN#TRPBF | PRODUCTION | |
| LTC3787HGN#PBF | PRODUCTION | |
| LTC3787HGN#TRPBF | PRODUCTION | |
| LTC3787HGN#WPBF | PRODUCTION | |
| LTC3787HGN#WTRPBF | PRODUCTION | |
| LTC3787IGN#PBF | PRODUCTION | |
| LTC3787IGN#TRPBF | PRODUCTION | |
| LTC3787IGN#WPBF | PRODUCTION | |
| LTC3787IGN#WTRPBF | PRODUCTION | |
| LTC3787MPGN#PBF | PRODUCTION | |
| LTC3787MPGN#TRPBF | PRODUCTION | |
|
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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| LTC3787EGN#PBF | PRODUCTION | |
| LTC3787EGN#TRPBF | PRODUCTION | |
| LTC3787EUFD#PBF | PRODUCTION | |
| LTC3787EUFD#TRPBF | PRODUCTION | |
| LTC3787HGN#PBF | PRODUCTION | |
| LTC3787HGN#TRPBF | PRODUCTION | |
| LTC3787HUFD#PBF | PRODUCTION | |
| LTC3787HUFD#TRPBF | PRODUCTION | |
| LTC3787IGN#PBF | PRODUCTION | |
| LTC3787IGN#TRPBF | PRODUCTION | |
| LTC3787IUFD#PBF | PRODUCTION | |
| LTC3787IUFD#TRPBF | PRODUCTION | |
| LTC3787MPGN#PBF | PRODUCTION | |
| LTC3787MPGN#TRPBF | PRODUCTION | |
| LTC3787MPUFD#PBF | PRODUCTION | |
| LTC3787MPUFD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice 2
- LTC3787 Demo Circuit - High Current 2-Phase Synchronous Boost Converter with Inductor DCR Sensing (7-16V to 12V @ 18A)
- LTC3787 Demo Circuit - High Current 2-Phase Synchronous Boost Converter (5V-24V to 24V@6A-10A)
Models for the following parts are available in LTspice:
- LTC3787
LTpowerCAD 2
- LTC3787 Project - PolyPhase Synchronous Boost Controller (5-22V to 24V @ 10A)
- LTC3787 Project - PolyPhase Synchronous Boost Controller (6-22V to 24V @ 30A)
Design tools for the following parts are available in LTpowerCAD:
- LTC3787
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® 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.
