MCP1827S-0802E/EB

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The MCP1827S-0802E/EB is a low dropout voltage regulator specifically designed for portable and battery powered applications. It is a linear regulator which means it can efficiently control the output voltage with only a small portion of power loss. The MCP1827S-0802E/EB is a fixed voltage regulator, meaning the output voltage is constant and determined by the fixed voltage value that is selected at the factory. It can regulate output from 0.8V to 5.0V and operates in a temperature range of -40°C to +85°C.

Key Features

• Wide input (2.7V to 6.5V)
• Ultra-low dropout voltage (270mV @ 100mA)
• Excellent load/line transient response
• High power supply rejection ratio (PSRR)
• Low quiescent current (77uA @ 300mA)
• Short-circuit current limit
• Thermal shutdown
• Output voltage accuracy 1.5%
• Small SOT-23-5L package (0.023")

Benefits and Applications

The MCP1827S-0802E/EB is the ideal choice for portable applications where the main requirement is to achieve a stable regulated output voltage with the minimum external components and with the lowest power loss. Its excellent PSRR, very low dropout voltage and fast transient response ensure a system performance suitable for a wide range of applications including, but not limited to, battery management systems, audio pre-amplifiers, power management, etc.

Working Principle of Linear Voltage Regulators

Linear voltage regulators are relatively simple in design, and they work by adjusting the output voltage by manipulating the difference between the input voltage and the output voltage. This process is known as "regulating the voltage." It is achieved by means of a linear regulator circuit, which consists of an amplifier stage and feedback circuitry. The amplifier stage amplifies a portion of the output voltage, and the feedback circuitry compares it with a reference voltage and adjusts the amplifier stage’s output accordingly. The amplifier stage then supplies the required amount of current to the load in order to maintain the desired output voltage. It should be noted that linear voltage regulation is not recommended for high power applications, since the efficiency of the regulator circuit may be adversely affected.

Conclusion

The MCP1827S-0802E/EB is a low-dropout voltage regulator that can effectively provide stable and accurate output voltages with minimum power loss. It is suitable for portable applications that require an ultra-low output voltage, making it an ideal choice for a wide range of applications. The working principle of linear voltage regulators is an important concept to understand, and it should be noted that they may not be suitable for high power applications due to their reduced efficiency.

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