The LTC ®3780 is a high performance buck-boost switch- ing 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 400kHz.
The LTC3780 controller supports input voltages from 4 V to 36 V and can regulate output voltages from 0.8 V to 30 V with ±1 % accuracy. It operates with a phase‑lockable fixed frequency of 200 kHz to 400 kHz and includes features such as synchronous rectification, internal LDO, and output over‑voltage protection.
The device is offered in 24‑lead SSOP and 32‑lead QFN packages and is intended for automotive, telecom, DC power distribution, and high‑power battery‑operated applications. Detailed pin descriptions, electrical characteristics, and typical performance graphs are provided throughout the document.
| Input Voltage Range | 4 V to 36 V |
|---|---|
| Output Voltage Range | 0.8 V to 30 V |
| Switching Frequency | 200 kHz to 400 kHz |
| Maximum Efficiency | up to 98 % |
| Package Options | 24‑lead SSOP, 32‑lead QFN |
The LTC3780 can operate with an input voltage up to 36 V.
The controller can achieve up to 98 % efficiency with synchronous rectification.