55V wide VIN four-switch buck-boost controller with I2C interface

The LM51772 is a four switch buck-boost controller that

provides a regulated output voltage if the input voltage is higher, equal, or lower

than the adjusted output voltage. In power save mode, the device supports very high

efficiency over the complete operation range of the output. The LM51772 runs at a fixed switching frequency, which

can be set via the RT/SYNC pin. The switching frequency remains constant during

buck, boost and buck-boost operation in forced PWM. The external compensation pin

allows very fast transient response for different applications. The device maintains

small mode transition ripple overall operating modes. The output voltage and device

configurations can be dynamically programmed via the integrated I2C

interface. The integrated and optional high-side current sensor features an accurate

output or input current limitation. The average current limit of the LM51772 is also configurable through the I2C

interface.