Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor. General Description. The LM LM are monolithic integrated circuits that in this data sheet are a family of standard inductors and flyback transformers. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, National Semiconductor, Series SIMPLE SWITCHER Step-Up Voltage.

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5V to 12 V Step-Up (Boost) Voltage Regulator with LM

If the IC is located far from the supply source filter capacitors, an additional larger electrolytic capacitor e. First, always get your datasheet straight from the manufacturer. HenryLachica The seller meant exactly what they said. If it isn’t possible to actually do it with this product, what are my other alternatives?

The input capacitor C1 should be a datazheet quality, low ESR, 0.

TI released a revised version in April The version you linked to is dated The next question is can the LM handle more than 3A? We would be able to supply 0.

Digikey might be a good place to start. It’s a good habit to get into.

Adjustable DC-DC Booster- LM2577

Find a different, more modern part with synchronous rectification, and while you’re at it, reevaluate whether you really need to use a 3V source. Home Questions Tags Users Datashset.


This is your maximum input current. Distributor Cooperated Designers Sponsorship. These solar cells need to go inside a solar charger controller that’s why we need to boost it to 12V.

LMADJ Datasheet(PDF) – National Semiconductor (TI)

You must have JavaScript enabled in your browser to utilize the functionality of this website. Put datasheeh way, you’re putting 9W into the regulator, and getting 6W of useful power out. Non-isolated buck Module Rectification: Even if the switch was up to it, the 3V source would have to supply over 20A.

I bought this product that has a LM in it and the specifications indicated by the seller that it can have a maximum output current of 2A with a maximum input current of 3A. JavaScript seems to be disabled in your browser. Sign up using Email and Password. It’s not going to work. To see why, let’s take a look at the datasheet again. There isn’t lm577 product in the world that will make that possible. The LM series of regulators are monolithic integrated circuits that provide all the active functions for a step-up buck switching regulator, capable of driving a 3A load withexcellent line and load regulation.

We will use solar panels so that would do it.

So if we stack it up, we’re gonna have a total of 4V and 6A, as a source tested the solar cells during a very hot day. If you’re trying to get 15V at 3A, this part is not going to do it. If you want 15V 2.


There is a very good chance that ” is a Chinese counterfeit so the chip specs may be different from the TI part, and the board specs are probably on the optimistic side. I’ve seen and looked into it. But the inductor is one of the most critical components in these types of circuits, so it’s much safer and simpler to or use ready made off-the shelf parts: Because it is a boost converter and you can’t break physics.

Sign up or log in Sign up using Google. The design uses the adjustable version of LM, but the 12V fixed-voltage version LMT will also work if you remove R1 and R2 and connect the feedback pin directly to the regulator’s output.

So we’re actually having problems of boosting both the current and voltage simultaneously. Only registered users can write reviews.

Granted, it’s a bit difficult to calculate exact switch current from a desired output current, but the point is, at a max switch current of 3A, it’s definitely not going to give you 13A switch current is always higher than output current.

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