LM2700QMT-ADJ/NOPB

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LM2700QMT-ADJ/NOPB is a DC/DC switching regulator from Texas Instruments. It is a reliable and easy-to-use DC/DC switching regulator that is suitable for a variety of portable and stationary applications. This device can provide a wide range of output voltages from 0.8 V to 5.5 V and can be configured for up to 5 A of current in a very small 5.0mm x 5.0mm package. LM2700QMT-ADJ/NOPB is a cost-effective and highly integrated solution that supports both voltage-mode and current-mode operation.

Application Field

The LM2700QMT-ADJ/NOPB can be used in a variety of different applications, ranging from portable and stationary applications. Some examples include:

• Smartphone and tablet charging applications
• Battery charging systems
• All kinds of industrial and automotive electronics
• USB power delivery applications
• Sensor data acquisition systems
• Point-of-Load and Point-of-Use systems
• Power supplies for AC-DC and DC-DC applications

Working Principle

The LM2700QMT-ADJ/NOPB is based on a voltage-mode architecture and uses an adaptive on-time (AOT) control scheme. In this scheme, a voltage loop sets the duty-cycle of a high-side MOSFET switch and a low-side MOSFET synchronous rectifier to maintain the output voltage. The on-time (TON) is set based on the feedback voltage and a feedback divider resistor. When the feedback voltage increases, the on-time is increased to reduce the output voltage. When the feedback voltage decreases, the on-time is decreased to increase the output voltage. The device also features a clock divided down mode selection in order to reduce the input current ripple.

The LM2700QMT-ADJ/NOPB can also be configured in 4-Mode operation by rotating the output transistor alignment and by increasing the dead-time capacitor value. 4-Mode operation provides higher efficiency and EMI performance at light loads. The device also supports pre-biased soft start, frequency foldback and phase-shifted clock synchronization.

Conclusion

The LM2700QMT-ADJ/NOPB is a cost-effective and highly integrated DC/DC switching regulator from Texas Instruments. It supports both voltage-mode and current-mode operation and can provide a wide range of output voltages from 0.8 V to 5.5 V in a very small 5.0 mm x 5.0 mm package. The device is suitable for a variety of portable and stationary applications, such as smartphones, tablets and battery charging systems. The LM2700QMT-ADJ/NOPB features an AOT control scheme, 4-Mode operation, pre-biased soft start, frequency foldback, and phase-shifted clock synchronization.

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