LM5118MH/NOPB

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LM5118MH/NOPB Application Field and Working Principle

The LM5118MH/NOPB falls under the category of PMIC (Power Management Integrated Circuit) in the Voltage Regulators - DC/DC Switching Controllers. PMICs are focused on components that manage power within a given profile of voltage and current, providing communications features that are necessary for maintaining a consistent power supply under a variety of conditions. The LM5118MH/NOPB is a highly advanced IC that integrates a voltage regulator, Pulse Width Modulation (PWM) controller, and protected high voltage power switch. Its primary specialization is controlling power consumption under a wide range of conditions.

In its function as a voltage regulator, the LM5118MH/NOPB uses an internal constant frequency pulse width modulation (PWM) controller and input voltage feedback to maintain a regulated output voltage. It also provides adjustable frequency, switching overvoltage protection, programmable soft-start, enable, and power fail/enable block. The LM5118MH/NOPB is a 5V fixed output, non-isolated regulator with a 0.6V to 5.2V variable input voltage range that can handle a maximum output current of 600mA. The processor can provide a targeted output voltage that is accurate to within +/- 1.5% of the output signal.

In terms of its functionality as a PWM controller, the LM5118MH/NOPB is rated for an external power switch, with current rating of up to 2A, capable of providing PWM control with dimming frequencies up to 500 kHz and gate drive power of 25 mA. A dedicated feedback loop enables precise control of the output voltage over the full operating temperature range. The device also features programmable soft-start, output under-voltage, over current and under-voltage protection and thermal shutdown. An integrated charge pump helps to reduce noise and further stabilize the on-state of the external MOSFET.

The LM5118MH/NOPB also integrates a protected high voltage power switch, which provides additional flexibility and reliability in applications where line-level rectification is necessary. It provides a bidirectional switch operating between 0V and 200V that can be effectively used to connect the IC to the input voltage source, while a separate current limit loop helps to manage over-current protection and soft-start periods. This integrated protection mechanism also helps to limit the inrush current during system startup and is rated up to 1.2A at 200V

The LM5118MH/NOPB offers a number of features and benefits that make it an ideal choice for power management applications in a variety of device types, from industrial to consumer. Its regulators and PWM controllers provide robust and reliable performance under varying conditions, while its protected power switch helps to safeguard the application from dangerous voltage spikes. Finally, its integrated charge pump, integrated overvoltage protection, and adjustable soft-start create a versatile power source that provides controlled, dependable power regardless of the operating environment.

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