High Power PolyPhase Synchronous Boost Controller Features -55°C to 150°C Operating Junction Temperature Range

The LTC3787 can produce a 24V at 10A output from a 12V input at up to 97% efficiency. Its 135µA standby quiescent current, when configured for Burst Mode operation, makes it ideal for automotive, industrial and medical applications. These H- and MP-grade versions are guaranteed over operating junction temperature ranges of -40°C to 150°C and -55°C to 150°C, respectively.

The LTC3787 operates from an input voltage ranging from 4.5V to 38V during start-up, maintains operation down to 2.5V after start-up and can regulate an output voltage as high as 60V. The powerful 1.2Ohm onboard N-channel MOSFET gate drivers are capable of slewing large MOSFET gates quickly.

The device’s current-mode architecture, clock output and phase modulation enable easy paralleling of multiple devices for up to 12-phase operation. The LTC3787 has a phase-lockable frequency from 75kHz to 850kHz or a selectable fixed frequency from 50kHz to 900kHz.

The LTC3787 is available in SSOP-28 and 4mm x 5mm QFN-28 packages. The 1000-piece price starts at $4.88 each for the H-grade devices and $12.39 each for the MP-grade parts.

Summary of Features: LTC3787
•Up to 97% Efficiency
•Eliminates Heat Sink in Medium to High Power Boost Converters
•Up to 60V VOUT Operation
•Wide VIN Ranging from 4.5V to 38V, Maintains Operation down to 2.5V after Start-Up
•Low 135µA Quiescent Current
•Powerful 1.2 Ohm Gate Drivers
•100% Duty Cycle Capability for Synchronous MOSFET
•Phase Lockable Frequency from 75kHz to 850kHz
•Programmable Fixed Frequency from 50kHz to 900kHz
•Current-Mode Control
•Phase Modulation for up to 12 Phases
•Power Good Output