LM5122QMH/NOPB

The LM5122QMH/NOPB is an advanced, wide input range synchronous DC/DC buck controller with integrated high and low side MOSFETs. It includes an internal voltage loop, power loop and low-side gate driver for efficiently supporting up to 0.5A load current. The device provides high-performance voltage regulation and maximum efficiency for a wide range of applications, from Vout = 6V down to Vout = 1.2V.

Application Field

The LM5122QMH/NOPB is the superior choice for a number of DC/DC conversion applications, such avionic, industrial, automotive and computing applications. The voltage regulators provide highly reliable output, low noise and fast transient responses. The device is highly efficient, with very low output ripple and noise, as well as fast transient response, to ensure high-performance voltage regulation. The integrated high and low side MOSFETs reduce overall circuit solution size, cost and save power. Additionally, integrated MOSFETs enable easy disconnect for hot-swap applications.

Working Principle

The LM5122QMH/NOPB consist of an internal voltage loop, power loop and low-side gate driver, providing truly integrated synchronous rectification. The wide input voltage range makes the voltage regulator suitable for a large variety of applications. The device is able to operate at a fixed frequency over a wide input voltage range. The switching frequency can be adjusted externally via a resistive divider. The internal voltage error amplifier provides voltage regulation accuracy is +/- 0.75%. The LM5122QMH/NOPB allows for full control loop compensation, providing fast transient response and minimum board layout area. The device features independent startup and tracking functions, as well as early stop of internal power MOSFETs. This eliminates the need for external firing components in low power applications. Furthermore, the device supports On/Off and Run modes, which provide flexibility for various design scenarios. Last, the device is able to operate in Continuous Conduction Mode (CCM) for wider ranges of load current.

Conclusion

In conclusion, the LM5122QMH/NOPB is an advanced and highly efficient DC/DC buck controller with integrated high and low side MOSFETs. It provides excellent voltage regulation accuracy, low noise and fast transient response for a wide range of industrial, automotive and computing applications. With the wide input voltage range, the device is the ideal choice for a number of DC/DC conversion applications.