The LTC3786 operates from an input voltage ranging from 4.5V to 38V during start-up, maintaining operation down to 2.5V after start-up and can regulate an output voltage as high as 60V. The powerful 1.2 Ohm onboard N-channel MOSFET gate drivers are capable of slewing large MOSFET gates quickly, minimizing transition losses and allowing for up to a 10A output current.
The LTC3786 has adjustable cycle-by-cycle current limit protection and uses either a sense resistor or monitors the voltage drop across the inductor (DCR) for current sensing. The LTC3786 has a phase-lockable switching frequency range of 75kHz to 850kHz and a fixed frequency operating range from 50kHz to 900kHz. Furthermore, the LTC3786 has adjustable soft-start and maintains +1% reference voltage accuracy over an operating temperature range of -40°C to 125°C.
The LTC3786 is available in a thermally enhanced MSOP-16 package and a 3mm x 3mm QFN.
Summary of Features of the LTC3786:
* Up to 98% 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 55µA Quiescent Current Extends the Run-Time in Battery-Powered Applications
* 8µA Shut Down 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
* RSENSE or Inductor DCR Current Sensing
* Current Mode Control
* ±1% Reference Voltage Accuracy over -40oC to +125oC
* Programmable Soft-Start
* Power Good Output