40V, 18V, 6A Synchronous Buck-Boost Silent Switcher

The LT8350 is a monolithic 4-switch synchronous buck-boost converter with Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequency. The switcher can regulate the output voltage, input or output current from input voltages above, below, or equal to the output voltage. The proprietary peak current mode control scheme allows adjustable and synchronizable 200kHz to 2MHz fixed frequency operation, or spread spectrum frequency modulation (SSFM) operation. With 3V to 40V input voltage range, 1V to 18V output voltage capability, and seamless low noise transitions between operation regions, the LT8350 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and battery powered systems.

The LT8350 provides input or output current monitor and power good flag. Robust fault protection is provided to detect output short-circuit condition, during which the LT8350 retries, latches off, or keeps running.

Applications

* Automotive, Industrial, Telecom Systems

* Voltage Regulator with Accurate Current Limit

* High Frequency Battery-Powered System

* USB-PD Source

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

* Silent Switcher® Architecture for Low EMI

* Up to 95% Efficiency at 2MHz

* Proprietary Peak Current Mode

* 3V to 40V Input Voltage Range

* 1V to 18V Output Voltage Range

* ±1.5% Output Voltage Regulation

* Output/Input Current Regulation and Monitor