Highly-versatile four-switch synchronous buck-boost controller

Now available from Mouser stock, the Texas Instruments (TI) LM5175 4-Switch synchronous buck-boost controller is capable of regulating the output voltage at, above, or below the input voltage. The device operates over a wide input voltage range of 3.5V to 42V to support a variety of applications - such as automotive start-stop systems, backup battery and supercapacitor charging, industrial PC power supplies, USB power delivery and LED lighting. The LM5175 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal. Features include programmable soft-start function, and numerous protection features (cycle-by-cycle current limiting, input under-voltage lockout (UVLO), output over-voltage protection (OVP) and thermal shutdown). The device also includes selectable continuous conduction mode (CCM) or discontinuous conduction mode (DCM) operations. Evaluation tools are also available.