DESCRIPTION

· The LM5118 is a wide voltage range Buck-Boost switching regulator controller designed for high-performance, cost-efficient Buck-Boost regulators with minimal external components.

· It maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it suitable for automotive applications.

· The device operates as a buck regulator when the input voltage is sufficiently greater than the output voltage and transitions to buck-boost mode as the input voltage approaches the output voltage.

· It features emulated current mode control, reducing noise sensitivity and allowing reliable control of very small duty cycles in high input voltage applications.

· The LM5118 includes drivers for high-side buck MOSFET and low-side boost MOSFET, and is available in a 20-pin HTSSOP package with an exposed die attach pad for thermal dissipation.

FEATURES

· Ultra-wide input voltage range from 3V to 75V.

· Emulated peak current mode control for reduced noise sensitivity.

· Smooth transition between step-down and step-up modes.

· Switching frequency programmable up to 500KHz.

· Oscillator synchronization capability.

· Internal high voltage bias regulator.

· Integrated high and low-side gate drivers.

· Programmable soft-start time.

· Ultra-low shutdown current.

· Enable input wide bandwidth error amplifier.

· 1.5% feedback reference accuracy.

· Thermal shutdown protection.

· 20-Pin HTSSOP package with exposed pad.

APPLICATIONS

· Industrial Buck-Boost supplies.

· Automotive power systems requiring wide input voltage range regulation.

· High-performance, cost-efficient power supply designs.