DescripTion
The LTC®3789 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 phase-lockable frequency of up to 600kHz, while an output current feedback loop provides support for battery charging. With a wide 4V to 38V (40V maximum) input and output range and seamless, low noise transitions between operating regions, the LTC3789 is ideal for automotive, telecom and battery-powered systems.

FEATUREs
Single Inductor Architecture Allows VIN Above, Below or Equal to Regulated VOUT
Programmable Input or Output Current Feedback Loop
Wide VIN Range: 4V to 38V
1% Output Voltage Accuracy: 0.8V < VOUT < 38V
Synchronous Rectification: Up to 98% Efficiency
Current Mode Control
Phase-Lockable Fixed Frequency: 200kHz to 600kHz
No Reverse Current During Start-Up
Power Good Output Voltage Monitor
Internal 5.5V LDO
Quad N-Channel MOSFET Synchronous Drive
VOUT Disconnected from VIN During Shutdown
Adjustable Soft-Start Output Ramping
Available in 28-Lead QFN (4mm × 5mm) and 28-Lead SSOP Packages

APPLICATIONs
Automotive Systems
Distributed DC Power Systems
High Power Battery-Operated Devices
Industrial Control