Selection of analogs for switching DC regulators on the example of Texas Instruments and STMicroelectronics

Even if your supply of parts has been established for several years and you are completely satisfied with their speed and cost of production, you always need to have spare options. For example, a plant can take a spare part out of production. Therefore, in any case, you need to navigate among several brands and their catalogs.

Detailed comparison of switching DC regulators

Selecting a substitute for a DC switching regulator requires deep technical knowledge and a lot of time. We demonstrate this process by comparing two parts from the brands Texas Instruments and STMicroelectronics. Both regulators are used in control circuits for boost, buck, and inverter devices. What should be done to find out if these parts are analogous to each other?

First you need to check:

  • Compatibility of overall dimensions and shape;
  • Electrical compatibility;
  • Comparison of traces;
  • Comparison of pinouts;
  • Checking the functionality of contacts.

It is also important to note that the manufacturers have named these models SOIC (8) and SO-8. A good specialist knows this. But this feature makes it difficult to carry out a comparative analysis by bringing two tables into one.

The details from our example demonstrate almost complete coincidence of electrical parameters. Only the accepted input current is different. The maximum value for Texas Instruments is 40 V, and for STMicroelectronics it is 38 V. This means that in most cases these parts will be interchangeable.

SourcingBot facilitates comparison and selection of analogs for DC switching regulators

We showed you how many parameters need to be compared when it comes to only two parts. But you always want to have a wider choice. Maybe you need faster shipping or lower price. In this case, the search for an alternative may take several days. The automated service SourcingBot allows you to easily and quickly solve this problem. To see a complete list of analogs, which are ranked according to the degree of coincidence of all parameters, you only need to enter the model name in the search bar.

All possible characteristics of each product are entered into the program database. Among them:

  • Shape and size of the body;
  • Number of contacts;
  • Ranges of input and output voltage;
  • Rated current;
  • Topology;
  • Synchronicity;
  • Configuration and number of outputs;
  • Operating temperature range.

Moreover, upon request, you can get the results of laboratory tests carried out by manufacturers. The parts list is updated regularly. It includes only samples of reliable brands with quality certificates. You can filter only the manufacturers you need.


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