Synchronous four-switch buck-boost DC-DC controller capable of regulating output voltage

Texas Instruments’ LM5175-Q1 is a synchronous four-switch buck-boost DC-DC controller capable of regulating the output voltage at, above, or below the input voltage. It operates over a wide input voltage range of 3.5V to 42V (60V maximum) to support a variety of applications. The device 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. It also features a programmable soft-start function and protection including cycle-by-cycle current limiting, input undervoltage lockout, output overvoltage protection, and thermal shutdown. In addition, it features selectable continuous conduction mode or discontinuous conduction mode operation, optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions. It is suitable for use in automotive start-stop systems, backup battery and supercapacitor charging, industrial PC power supplies, USB power delivery, and LED lighting.