LM2672LD-3.3/NOPB Integrated Circuits (ICs)

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LM2672LD-3.3/NOPB Application Field and Working Principle

The LM2672LD-3.3/NOPB is one of the many voltage regulators available in the voltage regulator category of Power Management ICs (PMIC). It is a DC-DC switching regulator that is capable of providing an output voltage of 3.3V at a switching frequency range of 200K to 1.5MHz. It is used widely in various electronic and industrial products, such as personal portable devices, computer motherboards and servers, medical applications and other industrial applications.

The LM2672LD-3.3/NOPB operates in three main modes including Pulsed-Width-Modulation (PWM), Fixed Frequency PWM (FFPWM), and Step-Down mode. All three modes are enabled by selecting one of the two enable pins. Depending on the selection of enable pins, the voltage regulator can provide an output voltage regulation of between 0.8V and VREF. The typical reference voltage for the LM2672LD-3.3/NOPB is 3.3V and the typical input voltage ranges from 4.5V to 16V.

The LM2672LD-3.3/NOPB has other features such as an adjustable output voltage, a shutdown mode, power-good and short-circuit protections, and over-temperature protections. Moreover, it includes integrated functions such as an error compensate circuitry, current limitation, and a voltage feedforward. The voltage feedforward reduces output voltage ripple with increasing output capacitance and enhances systems’ transient response. The error compatible circuitry reduces the power consumption at low loads and increases the efficiency. Furthermore, it includes an integrated power switch and over-temperature protection.

When operating in FFPWM mode, the LM2672LD-3.3/NOPB has a typical switching frequency of 300Khz, whilst in PWM mode its frequency can be adjusted by using the internal frequency adjust pin (FADJ). The maximum duty of the LM2672LD-3.3/NOPB is 99.5% and the minimum is 0.5%. An internal programmable leading edge blanking (LEB) circuit reduces the switching noise. The current sense amplifier allows the user to connect external sense resistor inline with the input voltage line to improve the current regulation performance.

In terms of applications, the LM2672LD-3.3/NOPB is applicable to systems such as laptops, mobile phones, personal computers and servers. The competitively low external component count of the regulator reduces complexity and board space, which in turn increases reliability. It is also applicable to systems powered with regulated dual Li-Ion cells.

In summary, the LM2672LD-3.3/NOPB is a DC-DC switching regulator that is capable of providing a high-efficiency, high-frequency output voltage of 3.3V. Its internal design and features make it suitable for a wide range of applications, such as personal portable devices, computer motherboards and servers, medical applications and other industrial applications. The compact size and the integrated functions make it a cost-effective, space-saving and reliable solution for many applications.

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