LM5118MH

The LM5118MH from Texas Instruments is a wide voltage range Buck-Boost switching regulator controller designed for high-performance, cost-efficient power supply applications. It features an ultra-wide input voltage range from 3 V to 75 V, enabling smooth transitions between step-down and step-up modes. The controller supports a programmable switching frequency up to 500 KHz and includes an oscillator synchronization capability. Key internal components include a high voltage bias regulator and integrated high and low-side gate drivers. The device offers a programmable soft-start time and an ultra-low shutdown current. Its feedback reference accuracy is 1.5%, and it incorporates thermal shutdown protection. The LM5118MH is available in a 20-pin HTSSOP package.

This controller is suitable for various power management applications requiring a wide input voltage range. Its emulated peak current mode control ensures stable operation. The device also features an enable input and a wide bandwidth error amplifier for precise regulation. The package is a 20-pin HTSSOP with an exposed pad, measuring 6.5 mm x 6.4 mm with an area of 41.6 mm².

Key electrical specifications include a maximum input voltage of 75V, a minimum input voltage of 3V, a maximum output voltage of 70V, and a minimum output voltage of 1.23V. The maximum duty cycle is 98%, and the typical quiescent current is 0.0045A. The operating temperature range is -40°C to 125°C.