The MIC5247-1.85BM5 is a low-dropout (LDO) voltage regulator from Micrel (now Microchip). It is designed to provide a stable and accurate 1.85V output voltage from a wide input voltage range. This regulator is known for its low quiescent current, which makes it suitable for battery-powered applications and other power-sensitive systems.

Applications

• Battery-Powered Systems: Ideal for use in portable devices, wireless communication devices, and other battery-operated equipment where low power consumption is crucial.
• Post Regulation for Switching Supplies: Can be used to provide a clean and stable voltage source after a switching regulator, reducing ripple and noise.
• Microprocessor and Microcontroller Power: Suitable for powering sensitive digital circuits, ensuring stable operation even with varying load conditions.
• Low Voltage Logic Supplies: Can be used to generate the required voltage for low-voltage digital logic circuits.

Features

• Low Dropout Voltage: Operates with a very small difference between input and output voltage, maximizing efficiency.
• High Output Accuracy: Provides a precise 1.85V output, ensuring reliable performance of connected circuits.
• Low Quiescent Current: Minimizes power consumption when the regulator is not actively supplying current to a load.
• Overcurrent and Overtemperature Protection: Protects the regulator and connected circuitry from damage due to excessive current draw or high temperatures.
• Stable with Ceramic Output Capacitors: Allows for the use of small, low-ESR ceramic capacitors, reducing the overall size and cost of the power supply.

Benefits

• Extended Battery Life: The low quiescent current helps extend the operational life of battery-powered devices.
• Improved System Performance: The stable and accurate output voltage ensures reliable operation of connected circuits, minimizing errors and improving overall system performance.
• Reduced Power Dissipation: The low dropout voltage and high efficiency minimize power loss, reducing heat generation and improving system reliability.
• Simplified Design: The regulator is easy to use and requires minimal external components, simplifying the design process.
• Robust Protection: The built-in protection features prevent damage to the regulator and connected circuitry, increasing system reliability and longevity.

Additional Details

The MIC5247-1.85BM5 is typically available in a small surface-mount package. It requires an input capacitor and an output capacitor for stable operation. The exact capacitor values may vary depending on the application and load conditions, but a typical recommendation is a 1µF ceramic capacitor for both input and output. The regulator also features a shutdown pin that can be used to disable the output and further reduce power consumption. It is important to consult the datasheet for detailed specifications and application guidelines.