LM27313XMF/NOPB

PMIC - Voltage Regulators - DC DC Switching Regulators

The LM27313XMF/NOPB is a high-speed integrated circuit that is used for so-called ‘switching regulator’ applications. It is part of the Voltage Regulators and Power Management IC grouping of components and supplies current to electronic circuits either in incremental steps or at specific rates.

The function of a switching regulator is to efficiently turn on and off the power supply to ensure that the right voltage is delivered to a given device. The oscillation of the switching regulator is controlled by the clock on the LM27313X, so it can be set to a given frequency. The LM27313XMF/NOPB is an ideal choice for those who wish to minimize the wattage of their consumption when powering multiple devices.

The device is able to switch from various power supplies and can source up to 10A without an external transistor. The process is regulated by monitoring the dynamic switch current limit. In addition, up to eight simultaneous output loads can be regulated at once and three types of dynamic

current limits are set depending on the load requirements. These current limits are configured and adjusted via external resistors.

The main features of the LM27313XMF/NOPB includes the support of multiple output voltages in steps of 1V, the ability to rapidly switch on/off loads, protection against transient over-voltage, multiple independent output currents, and the micro-power shutdown mode for significant energy savings when in low power mode.

As the LM27313XMF/NOPB is capable of both high speed switching and accurate voltage regulation, it is an ideal choice in a wide range of applications. These include medical, professional audio and broadcast, reliable DC-DC LED lighting, automotive, networking and communications, as well as power supply design projects.

Working Principle

The LM27313XMF/NOPB enables the rapid, high-efficiency switching of power between two or more sources. This is done by having an oscillator generate a square wave with the required frequency, which is then passed through a voltage comparator and the switching mechanism. The oscillator frequency is determined by the values of a pair of external resistors, and the voltage comparator is used to set the output voltage.

The LM27313XMF/NOPB has a built-in thermal protection feature, which prevents it from overheating. This is achieved by monitoring the diode temperature with a thermistor connected to the integrated circuit’s Input/Output pins. When the temperature exceeds a certain threshold, the LM27313XMF/NOPB’s internal heat sink is activated, which results in decreased heat dissipation.

Applications

The LM27313XMF/NOPB is widely used in a range of applications where current needs to be quickly and accurately regulated. This includes automotive electronic control functions (for example, turn signal lights, brake lights and headlights), medical equipment, laptop computer power supplies, and broadcast and professional audio equipment.

The LM27313XMF/NOPB is also well-suited to LED lighting projects, as it can provide a high efficiency output in a low-voltage environment. In addition, it can be used to regulate power to small circuit board components to reduce the risk of power fluctuation. This is particularly important for sensitive devices such as RF receivers and transceivers, as well as for voltage-critical digital components.

Conclusion

The LM27313XMF/NOPB is a high-efficiency, high-speed switching regulator IC that can be used in a wide range of applications. It is a perfect fit for projects which require multiple, accurate output voltages in a low-voltage environment. Furthermore, the thermal protection feature of the LM27313XMF/NOPB prevents overheating, enabling it to operate more reliably.

The ease of use, together with its high-efficiency, makes the LM27313XMF/NOPB an ideal choice for a variety of projects, ranging from automotive electronics to medical equipment and LED lighting.