DESCRIPTION
The LTC®3780 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant frequency current mode architecture allows a phaselockable frequency of up to 400kHz. With a wide 4V 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.

FEATURES
■ Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
■ Wide VIN Range: 4V to 36V Operation
■ Synchronous Rectification: Up to 98% Efficiency
■ Current Mode Control
■ ±1% Output Voltage Accuracy: 0.8V < VOUT < 30V
■ Phase-Lockable Fixed Frequency: 200kHz to 400kHz
■ 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
■ Foldback Output Current Limiting
■ Selectable Low Current Modes
■ Output Overvoltage Protection
■ Available in 24-Lead SSOP and Exposed Pad (5mm × 5mm) 32-Lead QFN Packages

APPLICATIONS
■ Automotive Systems
■ Telecom Systems
■ DC Power Distribution Systems
■ High Power Battery-Operated Devices
■ Industrial Control