60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum

The LT8390 is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input or output current from an input voltage above, below, or equal to the output voltage. The proprietary peak-buck/peak-boost current mode control scheme allows adjustable and synchronizable 150kHz to 650kHz fixed frequency operation, or internal ±15% triangle spread spectrum frequency modulation for low EMI. With a 4V to 60V input voltage range, 0V to 60V output voltage capability, and seamless low-noise transitions between operation regions, the LT8390 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.

The LT8390 provides input or output current monitor and power good flag. Fault protection is also provided to detect output short-circuit condition, during which the LT8390 retries, latches off, or keeps running.

Max Switching Frequency

Max Output Power

LT8390

650kHz

450W+

LT8390A

2MHz

50W+

Applications

* Automotive, Industrial, Telecom Systems

* High Power Battery-Powered System

* 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT

* Synchronous Switching: Up to 98% Efficiency

* Proprietary Peak-Buck Peak-Boost Current Mode

* Wide VIN Range: 4V to 60V

* ±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V

* ±3% Input or Output Current Accuracy with Monitor

* Spread Spectrum Frequency Modulation for Low EMI