LM20143MHE/NOPB

The LM20143MHE/NOPB is a monolithic step-down DC-DC switching regulator controller from Texas Instruments with an adjustable output voltage from 1.8V to 18V and a switching frequency of up to 2.2MHz. It delivers 2A of output current and is suitable for use in numerous applications. It supports a wide range of input voltages from 4.5V to 18V, and can operate with a very low quiescent current, making it ideal for battery-operated systems. The LM20143MHE/NOPB is provided in a 10-pin MicroPak or 10-pin Small Outlines packages.

Application Field

The LM20143MHE/NOPB DC-DC regulator can be used in a variety of applications, including cellular and GPS receivers, automotive infotainment, industrial controls, and consumer devices. Its highly efficient design and low quiescent current make it an ideal choice for battery-operated systems. It can also be used in LCD TVs and projector power supplies, medical imaging equipment, as well as applications requiring high ripple rejection.

Working Principle

The LM20143MHE/NOPB DC-DC regulator uses a switching-mode technique, in which a power switch is turned on and off very rapidly to transfer energy from the input side to the output side. During each switching cycle, the power switch is first turned on, allowing energy to be inductively stored in an inductor. The switch is turned off after a predetermined amount of time and the energy stored in the inductor is then transferred to the output capacitor. The output voltage is kept constant by varying the length of time the switch is turned on and off, thus controlling the amount of energy transferred to the output.

The LM20143MHE/NOPB is equipped with current mode control, which keeps the output voltage constant even under varying load or input conditions. This is achieved by monitoring the switch current and compensating for changes in the load or input voltage. In addition, the LM20143MHE/NOPB also includes a wide variety of protection features such as over-voltage protection and over-temperature protection, ensuring safe and reliable operation.

Conclusion

The LM20143MHE/NOPB is a highly efficient, low quiescent current DC-DC converter that is suitable for use in a wide range of applications. It provides adjustable output voltage up to 18V and can deliver up to 2A of output current. It also features current mode control and various protection features, making it a safe and reliable solution in various applications.