MIC2295YML-TR

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MIC2295YML-TR Application Field and Working Principle

The MIC2295YML-TR (YML-TR hereafter) is a DC-DC switching regulator categorized as a voltage regulator within the Power Management Integrated Circuit (PMIC) space. Its versatile feature set and tiny package size make the YML-TR an attractive choice for a variety of applications, such as those requiring low power output and low noise.

Features

The YML-TR’s relatively small package effectively delivers a maximum continuous current of 1.5A, while its output voltage can be adjusted between 1.25V and 10V. External components are typically kept minimal, as the YML-TR provides synchronizable 120kHz to 660 kHz switching. In addition, its Dynamic Voltage Positioning (DVP) feature allows for small voltage adjustments of ±1% of the appropriate output voltage.

The YML-TR also incorporates several protection features to help safeguard your system. Overvoltage Protection (OVP) is used to clamp output voltage during an overvoltage event, and Undervoltage Lockout (UVLO) prevents the output from starting until the input voltage exceeds the appropriate threshold. The YML-TR is also thermally protected, as it features both an internal thermal-shutdown (TSD) as well as an over temperature protection (OTP).

Applications

Due to its versatility, low power output and low noise that can be achieved with the YML-TR, it is ideally placed in a wide range of applications, such as automotive and consumer electronics. Its low output noise allows it to be used in applications requiring ultra-low noise and fast switching, such as LED flicker mitigation as well as digital audio applications. The YML-TR can also be used in several mobile device and medical applications such as mobile phone chargers and portable medical devices. In addition, the YML-TR can be used in energy transformation applications like those found in solar, wind and hydroelectric systems.

Working Principle

The YML-TR is a current-mode DC-DC converter, which means that it operates by regulating its output voltage based on the sense resistor’s current. The main active switch of the YML-TR is a N-channel MOSFET which is controlled by an internal current-mode control loop. The control loop functions by sensing the voltage across the sense resistor, and then using this sensed voltage to adjust the frequency and duty cycle of the switch. This has the effect of regulating the output voltage of the YML-TR.

The YML-TR also contains an analog voltage reference which is used to compare the current-sense voltage with a constant voltage. This comparison is used to either increase or decrease the frequency and duty cycle to help regulate the output voltage. This comparison occurs very quickly, allowing for smoother voltage transitions and protection from input voltage irregularities.

To further improve the performance of the YML-TR, the current signal from the control loop is also passed through a frequency compensation section. This section helps prevent high-frequency oscillations in the loop, while at the same time helping the loop to quickly respond to changes in the load. This ensures that the output of the YML-TR remains stable, even when there is a high degree of change in the load or the input voltage is varying significantly.

Conclusion

The MIC2295YML-TR is a small and versatile DC-DC switching regulator designed to provide a maximum continuous current of 1.5A with an output voltage adjustable between 1.25V and 10V. The YML-TR is ideally suited for a wide range of applications, including automotive, consumer electronics, mobile devices, LEDs, and medical devices. Its current-mode DC-DC converter design allows for quick adaptation to both input and load changes. Furthermore, the YML-TR includes several protection features such as overvoltage, undervoltage, and thermal protections that help ensure the safety of your system.

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