MCP1700-2502E/TO

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The MCP1700-2502E/TO belongs to the range of PMIC low dropout voltage regulators from Microchip, specifically found in the voltage regulators – linear subsection. It is designed for applications such as DC/DC converters and post-regulation for switching regulators.

The device has a wide, 1.4V to 22V operating input voltage range and a minimum output voltage of 0.8V with an output current capability of maximum 300mA at minimum dropout of 250mV. It offers an extended range of features such as under-voltage lockout (UVLO), device digitial debugger interface, power-saving shutdown mode, over-temperature protection (OTP), thermal shutdown (TSD), over-current protection, and a reverse battery protection.

Moreover, the device has an automotive-rated junction temperature range of -40°C to 125°C and a small footprint that is ideal for automotive applications. It supports large capacitive loads while featuring very low Quiescent Current (IQuiescent) of 40µA. Its low dropout voltage makes it perfect for battery powered applications.

In regards to its operation, the MCP1700-2502E/TO voltage regulator uses a PNP/PNP resistor type pass element that requires a very few external components. The internal PNP/PNP is fully protected against short-circuit and over-current conditions with a sense resistor and current-limiting circuit. Power dissipation is determined by the external power resistor required to establish the output voltage.

Its pinout consists of 8 pins, i.e., Terminal 1 (VIN), Terminal 2 (GND), Terminal 3 (VOUT), Terminal 4 (EN), Terminal 5 (Mode1), Terminal 6 (FB), Terminal 7 (Mode2) and Terminal 8 (TSD/OC). Terminal 1 and 2 are the input voltage pin and ground pin respectively and hence power to the device is provided through this pin. Terminal 3 is the output voltage pin and the output voltage is determined using the two mode pin. Terminal 4 is the enable pin or the shutdown pin and when this pin is high the LDO is enabled and when it is grounded or low the LDO is disabled. Terminal 5 and 6 are the mode pins that are connected to the sense resistor to determine the output voltage. Terminal 7 Mood2 pin is used to select the internal digital debugger interface of the device, while the terminal 8 is the over-current and thermal shutdown pin.

In conclusion, the MCP1700-2502E/TO Voltage Regulator is a robust and reliable device to provide a stable voltage to many automotive applications. With its wide input voltage range of 1.4V to 22V and its minimum dropout of 250mV at 300mA output current, it is suitable to maintain output voltage in battery powered applications, while also having a wide range of features like digital debugger, over-current and thermal protection.

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