LM is an adjustable voltage regulator IC used for shunt regulator, current regulator, and temperature controller. The LM LMC is a voltage regulator designed primar- ily for series regulator applications By itself it will supply output currents up to mA but external. Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are the property of their respective.

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If you have a heavily overcompensated i. For finding the value of output voltage for this circuit you can use the formula below:.

A Collection of Proper Design Practices using the LM723 IC Regulator

This terminal is directly supplied from the supply when not connected to series pass transistor. Current limiting sensitive to overload. If we pragmatically summarize the pros and cons of this methusalem, we end up with something like this: No wonder after 50 years, it is known what you may expect and what not.

First, ST went out of the LM business. Support for external pass transistorskeeping on-chip dissipation and therefore drift low.


National Semiconductor – datasheet pdf

Also able to use as either linear or switching type regulator. You are commenting using your Twitter account.

A PNP pass transistor can further improve noise performance. I added a reference study that compares voltage regulator noise.

Not a very high PSRR. Especially when driving MOSFETs, you might need a bleeder resistor to make the falling edges fast enough for your needs. A schematic with all suggestions implemented can be seen at the bottom of this page. Relying on a buried Zener low noise reference, it can compete with a lot of newer chips when it comes to lm7723 it does have a long term stability rating in the datasheet, few new chips have that.

Its a self-heated reference. If you need to regulate lower voltages, the LM chip itself needs a separate power input at 10V minimum.

No microscopic SMD cases available. Naturally, it is frowned upon by datasheeet lot of designers that are just half as old. Which comparable ICs are so much better now? Moderate error amplifer gain. As I found l,723 and others did as well their consumer parts where a bit drifty within spec limitsprobably by a conversion to a new manufacturing process with not just improvements as a consequence.


The net and some manufacturers application notes are also a good source of information. When you ask for the same basic parameters 40V, mA, … there is simply no better IC today.

You are commenting using your Facebook account. Yes, it will oscillate if you forget or undercompensate.

LM IC Pinout, Specifications, Equivalent & Datasheet

Can serve as positive, negative, shunt, pass, floating or switching regulator or as a temperature controller. The collector voltage Vc driving the output does not need to be stabilized. For your bread-and-butter PSU, they are still fine and noise is quite low. There is even an obsolete 80V version, the LCB.

So, in case you have decided for an LM to make a good power supply, there are some rules of thumb that will make your life easier:.

This also acts as a soft start feature. Provide enough voltage headroom. The way to go is either high side sensing with an op amp that can do that, or a floating design like the famous Elektor one from 1 x LM, 2 x LM

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