The MIC5255-2.8YD5 is a low-dropout (LDO) regulator from Micrel (now Microchip Technology). It is designed to provide a stable and accurate 2.8V output voltage from a wide range of input voltages. The regulator features low dropout voltage, high accuracy, and low quiescent current, making it ideal for battery-powered applications and other power-sensitive devices.

Applications:

• Battery-Powered Devices: Ideal for portable devices such as smartphones, tablets, and MP3 players.
• Handheld Instruments: Used in handheld test equipment, medical devices, and industrial meters.
• Microcontroller Power Supplies: Provides a stable and regulated supply voltage for microcontrollers and other digital circuits.
• Post-Regulation: Can be used to regulate the output voltage of a switching power supply.
• Sensor Power Supplies: Provides a clean and stable power source for sensitive sensors.

Features:

• Low Dropout Voltage: Operates with very low input-to-output voltage differential.
• High Output Accuracy: Provides a precise and stable 2.8V output voltage.
• Low Quiescent Current: Minimizes power consumption in standby mode.
• Over-Current Protection: Protects the device and the load from damage due to excessive current draw.
• Thermal Shutdown Protection: Prevents overheating and ensures reliable operation under extreme conditions.
• Stable with Ceramic Output Capacitors: Allows for the use of small and inexpensive ceramic capacitors.

Benefits:

• Extended Battery Life: Low quiescent current minimizes power consumption and extends battery life.
• Improved System Performance: Stable and accurate output voltage ensures reliable operation of the load.
• Enhanced System Reliability: Built-in protection features prevent damage from over-current and overheating.
• Simplified Design: Stable with ceramic capacitors simplifies the design process and reduces component count.
• Compact Solution: Small package size minimizes board space requirements.

Additional Details:

The MIC5255-2.8YD5 is available in a SOT-23-5 package. It operates from an input voltage range of 2.5V to 5.5V and provides a fixed 2.8V output voltage. The maximum output current is typically 150mA.

The device also includes a shutdown input for disabling the regulator and further reducing power consumption in standby mode.