MCP1791-5002E/ET

Current - Output:	70mA
Base Part Number:	MCP1791
Supplier Device Package:	5-DDPAK
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	Enable, Power Good
PSRR:	90dB ~ 75dB (100Hz ~ 1kHz)
Current - Supply (Max):	210µA
Current - Quiescent (Iq):	130µA
Series:	--
Voltage Dropout (Max):	1.3V @ 70mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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MCP1791-5002E/ET Application Field and Working Principle

PMIC – Voltage Regulators – Linear involves use of Linear Regulators, that is, devices that operate by and produce a regulated voltage that is lower than the input voltage, commonly referred to as a “dropout” voltage. The MCP1791-5002E/ET is a non-synchronous, fixed-output, low-dropout (LDO) linear regulator. It operates with a wide input voltage range of 3V to 25V and can provide an output voltage of 5V with a low dropout voltage of 0.2V, referenced to ground. The MCP1791-5002E/ET includes various integrated features that protect the device. The active-low voltage inhibit pin (VINH), when pulled low, disengages all regulation control circuitry and pulls the output voltage to ground. It also includes open-drain thermal protection, current limit circuitry, soft start, reverse-current protection and over-temperature protection. The device provides up to 1A of output current, making it ideal for applications that require a low-dropout 5V power source. The device features low quiescent current, low operating current and low noise making it suitable for battery-powered applications. With its low dropout voltage, it is the ideal choice for applications needing the lowest possible dropout voltage at large output current, making it a great solution for post regulation, sourcing and battery voltage management. The device is based on a low-dropout linear regulator which is an electronic component that maintains a constant output voltage and prevents current overshoot or undershoot of the power rails. This makes it ideal for applications such as viewfinder displays, audio DACs, automotive, general purpose power management and industrial control. The device has high output accuracy, low noise, low temperature coefficient and low output impedance. In addition, the device features internal short-circuit current limit and thermal shutdown protection, enabling reliable power dicing. Its fast 300ns turn-on time ensures the device will respond to load changes quickly. The device is ideal for applications requiring wide input voltage range, high efficiency, long battery life and low dropout voltage. By providing a low dropout voltage, fast response time and excellent accuracy, the MCP1791-5002E/ET is an excellent choice for low power, noise sensitive and battery-powered applications that require a 5V output with a wide input voltage range. Working PrincipleThe MCP1791-5002E/ET works by regulating a voltage drop between its output (VOUT) and ground (VSS) pins. The dropout voltage is determined by the ratio of the device’s on-chip resistor, RON. The voltage drop sets up a voltage divider that reduces the voltage at VOUT. The voltage regulator uses a bandgap reference in order to set the output voltage at a constant value.The bandgap reference monitors the output voltage, VOUT, and compares it to the reference voltage. When VOUT rises above its nominal voltage, the bandgap decreasespulling the output voltage back towards its nominal value. The bandgap reference also acts to protect the device from having an output voltage that is too low, keeping the voltage difference between VOUT and ground ( VSS ) within a safe range.In order to provide maximum flexibility, the MCP1791-5002E/ET has a programmable output voltage range, adjustable via an external resistor divider connected to the VINH pin (voltage inhibit). This feature can be used to provide a voltage output that is lower than its nominal value.The device also includes various integrated features to protect the device. The active-low voltage inhibit pin (VINH), when pulled low, disengages all regulation control circuitry and pulls the output voltage to ground. It also includes open-drain thermal protection, current limit circuitry, soft start, reverse-current protection and over-temperature protection. The device also features low quiescent current, low operating current and low noise making for a great choice for battery-powered applications. Its fast 300ns turn-on time ensures the device will respond to load changes quickly, making it ideal for applications requiring wide input voltage range, high efficiency, long battery life and low dropout voltage. In conclusion, the MCP1791-5002E/ET is an ideal choice for low power, noise sensitive and battery-powered applications that require a 5V output with a wide input voltage range. With its low dropout voltage, it is the ideal choice for applications needing the lowest possible dropout voltage at large output current, making it a great solution for post regulation, sourcing and battery voltage management.

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