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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They see this chip as an old-age part that has no merits today.

LM Datasheet(PDF) – National Semiconductor (TI)

Not a very high PSRR. When you ask for the same basic parameters 40V, dattasheet, … there is simply no better IC today. Also able to use as either linear or switching type regulator. Before you specify a compensation cap, run a few tests using SPICE to see if gain and phase margins are in order.

Try with different output lm732, load currents and input voltages. Compensation by the user. You are commenting using your WordPress. There is even an obsolete 80V version, the LCB. A schematic with all suggestions implemented can be seen at the bottom of this page. Gate parasitic suppression resistors of a few Ohms are also a good idea.


National Semiconductor

Minimum regulated output voltage is ca. Minimum Output for Floating Regulators. The net and some manufacturers application notes are also a good source of information. You are commenting using your Twitter account.

To use this IC for the different range of required output voltage, you can proceed with various circuits available in LM datasheet with having your needed output range. Input voltage goes up tp 40V constant, with 50V pulses allowed. Which comparable ICs are so much better now? They dont make this part anymore. Pin configuration Pin No. The performance of an LM is not bad at all, especially for noise and long term stability. The curves of the limiting transistors Vbe voltages over temperature in the LM datasheet should make it absolutely clear that no precision can be expected here.

The collector voltage Vc driving the output does not need to be stabilized. One of the best low noise regulators even today when hooked up properly. Its comparing apples and oranges. I added a reference study that compares voltage regulator noise. Intolerant to missing or misdesigned compensation. Extended Temperature Range available. For getting an output voltage range from 2v to 7v you can use the circuit below, which is a Basic Voltage Regulator circuit using LM voltage regulator IC.

Some extra bleeders are needed to make falling edge output regulations fast enough. As I found out 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.


First, ST went out of the LM business. From a power supply manufacturer I read some email correspondence with TI tech support where he also claimed more drift in recent parts.

Current limiting sensitive to overload.

Moderate error amplifer gain. Relying on a buried Zener low noise reference, it can compete with a lot of newer chips when it comes to stability it does have a long term stability rating in the datasheet, few datasjeet chips have that.

A Collection of Proper Design Practices using the LM723 IC Regulator

It can able to provide a higher range of output voltage and current up to 10A by simply adding a series pass transistor with it, with having a wider lm73 of operating temperature so the IC able to withstand for long.

Minimum dropout voltage is ca.

Both have been making s for decades, and after the sale TI took over the National Semiconductor designation of LM and used their own of uA A schematic where all datasjeet has been implemented can be see below: This cancels the error amps base bias currents.