Emulated regulator controller offers best-in-class input range

摘要

Having a best-in-class operating voltage range of 3 to 75 V, the LM5118 emulated current-mode-controlled buck-boost dc/dc regulator controller targets automotive, telecom, and battery-powered systems. The controller features programmable switching frequency to 500 kHz, shutdown current, and transition between buck and buck-boost modes. It features peak efficiency of 95%. The two-switch configuration enables design engineers to assemble a power converter with a wide input voltage range. It is well suited for powering a dashboard display, electronic controls such as antilock braking or fuel injection control, and microcontrollers used in cars. To ensure seamless control from electronic modules, the system operates at 4 V.