MIC5209-1.8BM

The MIC5209-1.8BM is a high-current linear voltage regulator designed to provide precise, cost-effective power to a variety of applications. It offers a 300 mA output current and is packaged in a small, 1.0 mm x 1.8 mm MSOP/DFN package. The MIC5209-1.8BM is designed to provide high accuracy at up to 3 V output, and is rated for operation over the entire range of 0.6 V to 5.5 V input supply range.

Application field of MIC5209-1.8BM

The MIC5209-1.8BM is a compact high-current voltage regulator intended for use in space-constrained and portable electronic devices, specifically those applications that require a precisely regulated output voltage but do not require the tight load or line regulation characteristics of a switching regulator. Such applications commonly include mobile phones, digital cameras, PDAs, computer peripherals, data loggers, medical instruments, and audio/video products.

The MIC5209-1.8BM can also be used in other applications where a low-dropout, low-noise, high-output current linear regulator is desired, such as in industrial, automotive, and avionics systems. The device is rated for very small quiescent currents, making it ideal for always-on systems or those requiring very thin walls in the battery compartment. Its low dropout voltage of 1.6 V limits power dissipation even when the input supply is only slightly above the specified output voltage.

Working Principle of MIC5209-1.8BM

The MIC5209-1.8BM is a low-dropout linear voltage regulator, and it works by maintaining a constant voltage drop between its input and output pins. A small current is used to control this voltage drop, and the device is designed to ensure that this current is maintained at a stable level. In other words, the output voltage of the device is controlled by regulating the flow of current across its two pins, with the regulator attempting to keep the output voltage at a fixed level, regardless of changes to either its input voltage or output current.

The MIC5209-1.8BM is designed to maintain an output voltage that is accurate to within 0.6% over a temperature range of -40°C to +125°C. It is also designed to maintain output voltage stability over the full range of the input voltage, with a minimum dropout voltage of 1.6 V. This enables the device to be used in applications where input supply voltages may vary significantly.

The MIC5209-1.8BM also has excellent transient load regulation performance, making it suitable for applications such as LED backlighting, where load currents can change rapidly. The device is also designed to remain stable under high input supply voltage ripple conditions, up to 2V peak-to-peak. This makes it ideal for applications that require a very clean output voltage.

Conclusion

In conclusion, the MIC5209-1.8BM is a high-current linear voltage regulator that is an ideal choice for applications where precise, cost-effective power is required. It offers high accuracy, excellent transient load regulation performance and low dropout voltage, making it suitable for a variety of applications including mobile phones, data loggers, medical instruments, and avionics systems.