LM2676SX-5.0 Integrated Circuits (ICs)

DC DC switching regulators are used in a variety of applications including high-performance switching regulator integrated circuits that are designed to provide efficient, accurate and low-noise power regulation. LM2676SX-5.0 is one of these switching regulator circuits and has been designed for applications where fast transient response, low output noise and high efficiency are essential. It works using a switching buck regulator circuit with current-mode control with an adjustable frequency and adjustable voltage.

Operating Principle

The LM2676SX-5.0 operates on a buck-type DC-DC converter with current-mode control. Current mode control is a type of feedback loop control used to regulate output voltage and current in DC-DC converters. In this type of feedback loop, the amount of current being used to generate the output voltage is compared to a set reference current. When the actual current falls below this reference current, the converter will increase the power output in order to maintain the set output voltage. When the actual current exceeds the reference current, the converter will reduce the power output in order to maintain the set output voltage. The reference current can be adjusted to optimize the regulator\'s performance.

The LM2676SX-5.0 is designed for fast transient response, low output noise and high efficiency. To achieve this, it uses a switching buck controller with a frequency of 250kHz and an adjustable voltage of 5V. The circuit performs a dynamic current-mode control of the buck converter, with the feedback being performed by a voltage divider at the output of the converter. The current sensing is done through an external shunt resistor at the switch node of the buck converter. The voltage divider and the current-sensing resistor are used together by the controller in order to maintain the output voltage set by the user.

Features

The LM2676SX-5.0 includes a variety of features that make it an ideal choice for high-performance regulation applications. Some of these features include:

• High switching frequency up to 250kHz
• Minimum input voltage of 5V
• Output voltage of up to 12V
• Wide range of output current capability
• MOSFET switch with low-RDS(ON) control
• External shunt resistor for current sensing
• Low output noise and high power efficiency
• Thermal protection
• Adjustable on-time and voltage

Application field

The LM2676SX-5.0 can be used in a variety of applications, such as for powering low voltage DC motors, for driving laser diodes, for powering FPGA and ASICs, for powering low voltage DC-DC converters, for powering 12V telecom systems, for providing stable 5V outputs and for battery-powered applications. It can also be used to power low-power LEDs, to power SAR ADC and ADC, to drive P-channel MOSFETs, to power CMOS logic circuits and for other general purpose applications.

Conclusion

The LM2676SX-5.0 is a high-efficiency, low noise, fast transient response switching regulator. It is designed for a variety of applications and includes a variety of features to optimize its performance. It is ideal for any application that requires a reliable, efficient and low noise voltage regulation.