LM2738XMY/NOPB

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LM2738XMY/NOPB is an integrated circuit that is offered by Texas Instruments. It is a voltage regulator and a DC DC switching regulator. This device is from Texas Instruments’ PMIC (Power Management ICs) product line. It belongs to the voltage regulator category alongside adjustable regulators, buck regulators and boost regulators.

The LM2738XMY/NOPB regulator integrates a peak-current-mode control PWM converter and a linear regulator, forming a single total solution. This solution provides post-regulation of output voltages while increasing efficiency. The load regulation and transient response of the device also sees improvement with the use of the current-mode control. The implementation of the voltage loop with a single resistor gives accurate and stable tracking of output voltages.

The device can handle input voltages up to 65V and the output voltage is adjustable from 0.9V to 26V. The output current of the LM2738XMY/NOPB regulator can go up to 5A. When the temperature of the device increases, the output voltage is automatically reduced. This serves to protect other components from over-voltage. The device also has very low output-voltage ripple and low running noise from the PWM converter.

The features mentioned make the LM2738XMY/NOPB DC DC voltage regulator a good choice for applications such as point-of-load (POL)dc-dc converters. Industrial applications such as digital display systems, telecom bases, and robotics also employ this device. This device can also be used in automotive applications.

The operation principle of the LM2738XMY/NOPB regulator is illustrated below. The input voltage is first stepped down by the step-down circuit. The voltage is then regulated via the linear regulator. The feed-forward voltage reference controls the output voltage of the regulator. The error amplifier receives the output voltage of the linear regulator and compares it to the reference voltage.

The error amplifier then determines the difference between the output voltage and the reference voltage. If the output voltage is too low, the error amplifier triggers a PWM signal. This causes the PWM converter to increase output current. On the other hand, if the output voltage is higher than the reference voltage, the PWM signal is reduced. This results in a decrease of the output current. The output current creates a magnetic field which is used to produce the output voltage.

In conclusion, the LM2738XMY/NOPB voltage regulator and DC DC switching regulator is an integrated device that is used in applications such as digital display systems, telecom bases, robotics, automotive and point-of-load (POL) dc-dc converters. The peak-current-mode control PWM converter, the linear regulator and the voltage loop all contribute towards efficient operation of the device. The error amplifier allows for voltage regulation and the output voltage is adjustable between 0.9V to 26V.

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