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
车用, 通信与网络, 电源管理, 工业
(EN)
