LM2937ET-12

Today’s complex power management electronics often require adjustable voltage levels and system-level sequencing, but there’s a need for a single device that can provide both. That’s where the Texas Instruments LM2937ET-12 voltage regulator comes in. This ARTICLE focuses on the application fields and working principles behind the LM2937ET-12.

The LM2937ET-12 is a low-dropout (LDO) voltage regulator with a wide input voltage range of 2.7 V to 24 V and an adjustable output of 1 V to 20 V. This LDO regulator features a high current rating with up to 800 mA of output current, providing enough power to meet the requirements of many applications. It also offers a wide range of protection features such as current atypical, power limiting, over-voltage and overtemp protection.

As an adjustable linear voltage regulator, the LM2937ET-12 is widely used in applications such as notebook computers and desktop PCs, telecommunications, industrial control, automotive, and medical equipment. The device can also be used to design motor control system and power supplies for telecom and telecommunications equipment that require low-voltage and accurate voltage regulation.

In terms of its working principle, the LM2937ET-12 has a built-in current mirror-based pass element that provides the necessary number of current mirrors for high-precision voltage regulation. The current mirrors are controlled by the internal voltage reference, which maintains a constant output voltage despite load transients, load changes, temperature, and input voltage changes. The LM2937ET-12 also provides an external voltage regulation control pin that can be used to adjust the output voltage level. This control pin is also used to provide system-level sequencing by allowing the output voltage of the regulator to be set after the input voltage has stabilized.

In addition, the LM2937ET-12 also provides an enable (EN) pin that is used to enable and disable the device. The enable pin can be connected to an active-low Logic signal, such as a GPIO pin, a timer, or a sequencer. This allows the LM2937ET-12 to be used for system-level power sequencing and power management.

The LM2937ET-12 offers some other features that make it a good choice for power supply applications. It has a fast start-up time of 1.5 µs and the output voltage accuracy is guaranteed up to 11.3%. The quiescent current of the LM2937ET-12 is also very low (2.2 mA max) for an adjustable LDO regulator.

The LM2937ET-12 is a highly advanced voltage regulator that provides flexible system-level sequencing and protection features. Its wide input voltage range and adjustable output make it suitable for a wide range of applications. The LM2937ET-12 is a great solution for designers who are looking for an adjustable linear voltage regulator with low current consumption and wide input voltage range. Using this powerful voltage regulator can help designers achieve a highly efficient, reliable, and cost-effective power supply solution.