LM2941CT/LF04

LM2941CT/LF04 application field and working principle

The LM2941CT/LF04 is a Linear low dropout low quiescent current regulator from Texas Instruments. It features an extremely low quiescent current of only 25uA, a low dropout voltage of 200 mV at a 3A load, a wide input voltage range of 2.7V to 40V, and a wide temperature range of –40C to +125C. These features make the LM2941CT/LF04 ideal for automotive, industrial and office applications where low energy consumption, accuracy and reliability are critical.

The LM2941CT/LF04 is a monolithic three-terminal low dropout regulator which is specifically designed to deliver currents up to 3A without the need for an external current limiting. It offers load regulation of 0.01V and a wide temperature range of –40C to +125C. With its low quiescent current, wide input voltage range, low dropout voltage and high output current capabilities, the LM2941CT/LF04 has many applications in automotive, motor vehicle, industrial, battery powered systems and microcontrollers.

Working Principle

The LM2941CT/LF04 consists of a bandgap voltage reference, error amplifier, output transistor, and control circuitry. The error amplifier monitors the output voltage and compare it with the voltage reference. The error amplifier then drives the output transistor to maintain the output at the desired value.

The LM2941CT/LF04 has a build-in overtemperature protection circuit. When the die temperature exceeds the rated temperature of the device, the transistor is shut down and the output voltage is clamped to the enable voltage. Over-current protection is also provided by the thermal shut-down limiting the load current when the junction temperature is too high.

Features and Benefits

• Low quiescent current: 25uA
• Low dropout voltage: 200mV at a 3A load
• Wide input voltage range: 2.7V to 40V
• Wide temperature range: -40C to +125C
• Output current up to 3A
• OV and OC protection
• Excellent line and load regulation: 0.01V

The LM2941CT/LF04 is an excellent choice for automotive, industrial and office applications where low energy consumption, accuracy and reliability are critical. It offers a low quiescent current, wide input voltage range, low dropout voltage and high output current capabilities, making it a great choice for battery powered systems and microcontrollers.