LM236Z

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An LM236Z is an adjustable linear voltage reference and a 3-terminal adjustable shunt voltage regulator created by the Texas Instruments Incorporated. This voltage regulator can output a fixed voltage between 1.237V and 37V, and it is able to handle up to 1.5A of current. It has an exceptionally good regulation and temperature coefficient at high line and load conditions and is suitable for use in a wide range of applications.

The LM236Z has two distinct application fields. Firstly, it can be used as an adjustable shunt regulator in an analogy circuit. It operates by having the excess current that is shunted through the output node which is adjusted to give a fixed voltage reference at the output terminal. This is an ideal for applications that require an adjustable voltage source or current source.

Secondly, the LM236Z can also be used as a comparator for analog control or logic circuits. Here, two inputs are combined so that if the voltage of one of the inputs exceeds the voltage of the other, a logic level output is achieved. This is particularly useful in time critical applications where responses need to be quick.

The LM236Z operates in a very straightforward manner. It acts as an adjustable voltage regulator which senses the voltage drop between the output terminal, to ensure a regulated output voltage no matter how much the load varies. The adjustment of the output voltage is achieved by varying the current through the LM236Z’s shunt voltage regulator, or the gate of the CMOS switch. The current through the voltage regulator is determined by the voltage on the adjust terminal, which can be adjusted externally either by setting a voltage or current to the adjust terminal.

The LM236Z is made up of several components, including a power transistor, a junction field effect transistor (JFET), and a three-terminal adjustable shunt regulator, which together form a voltage reference. This voltage reference can hold the output voltage to a much higher level of accuracy than can be achieved without a voltage reference. The LM236Z can directly drive medium-power LEDs, relays, and a few logic signal sources.

The LM236Z’s overall working principle is fairly easy to understand. It operates as an adjustable voltage reference with a three-terminal adjustable shunt regulator, where the output current is determined by the voltage on the ADJ terminal. The excess current is shunted through the output node, creating a fixed voltage reference at the output terminal. The adjustment of the output voltage is achieved by adjusting the current through the voltage regulator, or the gate of the CMOS switch, allowing for the regulation of the output current.

The LM236Z is an extremely powerful and useful tool for a variety of applications, from adjustable shunt regulators to analog control circuits. Its ability to precisely regulate voltage makes it very reliable and suitable for high-precision applications. Its operating principle is straightforward and simple, making it a good option for any application that needs a reliable and accurate voltage reference.

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