LM2940CS-12

Current - Output:	1A
Base Part Number:	LM2940
Supplier Device Package:	DDPAK/TO-263-3
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	66dB (120Hz)
Current - Supply (Max):	15mA
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	0.8V @ 1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	26V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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• Introduction

The LM2940CS-12 is a low-dropout adjustable 1A linear regulator from Texas Instruments. It is a voltage regulator that is used for applications such as battery-powered devices and in automotive systems. The LM2940CS-12 has a power output of 1A with a voltage of 12 V. It can be adjusted with a wide range of input voltage levels, allowing it to be used in applications requiring power from multiple sources.

• Application Fields

The LM2940CS-12 has a wide range of applications. It can be used in device regulation applications where power is required from multiple sources, such as automotive systems, medical equipment, and portable electronics. The LM2940CS-12 is also well suited for battery-powered applications as it provides high-performance power solutions in a small form factor. It operates from a single input source and can provide up to 12 V output with no additional components. In automotive applications, the LM2940CS-12 is used for voltage regulation in engine control modules, ABS modules, and lamp control systems. The LM2940CS-12 can also be used for charging and discharging of battery packs for electric vehicles.

• Working Principle

The LM2940CS-12 uses a voltage regulator circuit to provide its regulated output voltage. The circuit consists of an error amplifier, a control compute, a pass transistor, and an output current sensing circuit. The error amplifier monitors the output voltage of the regulator and compares it to the reference voltage. If the output voltage is too low, the error amplifier sends a signal to the control compute, which adjusts the output voltage by increasing or decreasing the current through the pass transistor. The output current sensing circuit senses the output current of the regulator, and if the current is too high, the control compute adjusts the output current to prevent overload.

• Conclusion

The LM2940CS-12 is a low-dropout adjustable 1A linear voltage regulator from Texas Instruments. It has a wide range of applications, such as device regulation, automotive systems, medical equipment, and battery-powered devices. The LM2940CS-12 operates from a single input source and can provide up to 12 V output with no additional components. It uses a voltage regulation circuit consisting of an error amplifier, a control compute, a pass transistor, and an output current sensing circuit to provide its regulated output voltage.

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