The LM5168 is a synchronous buck converter with a wide input voltage range from 6 V to 115 V and maximum output current of 300 mA. The LM5168 can be configured as an inverting buck-boost (IBB) converter with a negative output voltage. This application note demonstrates how the LM5168 can be used as an inverting buck-boost converter, along with optional design considerations for inverting buck-boost converters such as a PGOOD or EN level-shifter. If higher output current is required, the LM5168 is pin-to-pin compatible with the 600-mA rated LM5169. Automotive grade versions, the LM5168-Q1 and LM5169-Q1, are also available.