LM340T-5.0

Current - Output:	1A
Base Part Number:	LM340
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB (120Hz)
Current - Quiescent (Iq):	8mA
Series:	--
Voltage Dropout (Max):	2V @ 1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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LM340T-5.0 is a three-terminal negative-voltage regulator with internal current-limiting, thermal shutdown, and output-transistor safe-area compensation, which is widely used in a variety of applications in the Power Management Integrated Circuit (PMIC) family. The LM340T-5.0 is commonly used to regulate the output of power supplies and to control the output voltage of a DC-DC converter. It is also used in voltage monitoring and voltage protection circuits, making it a versatile and widely used product in the power management field.The linear voltage regulators in the PMIC family, such as the LM340T-5.0, use adjustable or fixed voltage settings and have multiple output voltage options. These regulators are widely used for their easy implementation, cost effectiveness, and flexibility in customization.The LM340T-5.0 is an adjustable-voltage negative regulator with an output voltage that can be adjusted between -5.0V and -75V. It has an on-chip thermally compensated reference voltage, an error amplifier, and an internal current-limiting circuit which can be set to a maximum of 1.5A. It also has an output transistor safe-area compensation circuit.The LM340T-5.0 is implemented in several ways. It can be used as a conventional three-terminal linear voltage regulator, as a voltage limiter, or as a stable reference source.The three-terminal linear voltage regulator can be used as a simple constant-voltage source. It uses a Zener diode, or reference integrated chip such as the LM340T-5.0, to regulate the output voltage through an error amplifier. The reference voltage is compared to the feedback voltage of the output voltage. If the output voltage is lower than the desired value, the error amplifier increases the drive to the pass element which increases the output voltage. If the output voltage is higher than the desired value, the error amplifier reduces the drive to the pass element which reduces the output voltage. This regulation loop is controlled such that the output voltage is kept constant and within tolerance.When used as a voltage limiter, the LM340T-5.0 acts as a current source. When the output voltage exceeds the breakdown voltage, the regulator inverts the output voltage to a negative voltage and limits the current to a nominal fixed value. This protects the device from excessive current draw and helps protect the system from damaging transients.When used as a stable reference source, the LM340T-5.0 maintains a consistent voltage output as load current changes. This is useful in current-sensing, temperature-control, and other applications where a stable, precise reference voltage is required.The LM340T-5.0 is a versatile, cost-effective, and flexible three-terminal negative voltage regulator for any application in the PMIC family. Its adjustable output and wide output range, coupled with its internal current-limiting and thermal shut-down, make it an ideal choice for regulating and controlling output voltage of power supplies and DC-DC converters. It is also a reliable solution for voltage monitoring and protection circuits, giving designers greater flexibility in their designs.

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