LTC3780EG#PBF - 

DC/DC Controller, 4V to 36V, 1 Output, Synchronous Boost, Synchronous Buck, 440kHz, SSOP-24


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Product Overview

The LTC3780EG#PBF is a high efficiency synchronous 4-switch Buck-boost Controller operates from input voltages above, below or equal to the output voltage. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz. With a wide 4 to 30V (36V maximum) input and output range and seamless transfers between operating modes, the LTC3780 is ideal for automotive, telecom and battery-powered systems. The operating mode of the controller is determined through the FCB pin. For boost operation, the FCB mode pin can select among Burst Mode® operation, Discontinuous mode and Forced Continuous mode. During buck operation, the FCB mode pin can select among Skip-Cycle mode, Discontinuous mode and Forced Continuous mode. Burst Mode® operation and Skip-Cycle mode provide high efficiency operation at light loads while forced continuous mode and discontinuous mode operate at a constant frequency.
  • Single inductor architecture allows VIN above, below or equal to VOUT
  • Synchronous rectification up to 98% efficiency
  • Current mode control
  • ±1% Output voltage accuracy (0.8V < VOUT < 30V)
  • 200 to 400kHz Phase-lockable fixed frequency
  • Power good output voltage monitor
  • Internal LDO for MOSFET supply
  • Quad N-channel MOSFET synchronous drive
  • VOUT disconnected from VIN during shutdown
  • Adjustable soft-start current ramping
  • Fold back output current limiting
  • Selectable low current modes
  • Output overvoltage protection


Automotive, Communications & Networking, Power Management, Industrial

Product Information

1 Output
Synchronous Boost, Synchronous Buck
MSL 1 - Unlimited
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