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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LM Datasheet(PDF) – National Semiconductor (TI)

What you’re wanting is physically not possible. Digikey might be a good place to start. Henry Lachica 8 6. You may also like. I only get 0. Ratasheet must have JavaScript enabled in your browser to utilize the functionality of this website. The IC has a wide input voltage range 3. That is pretty abysmal efficiency for a modern SMPS, but not outside of reasonable for the LM25xx era, and as much of a boost as you’re trying to get.

Home Questions Tags Users Unanswered. What does the “absolute maximum output switch current” and the “operating maximum switch current” mean? Post as a guest Name.

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

The switch switches the input current to ground through the inductor and sense resistor. 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.


Enter your destination to get a shipping estimate. We will use solar panels so that would do it. 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. It’s just making life harder. By using our site, you acknowledge that datwsheet have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. So what did the seller mean by Input Current: TI released a revised version in April HenryLachica The seller lm577 exactly what they said.

Even if the llm2577 was up to it, the 3V source would have to supply over 20A. 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 datadheet directly to the regulator’s output.

I have a hard time fully understanding the datasheet of LM Please sign up to the Market mailing list to receive updates on new arrivals, special offers and other discount information Subscribe.

The next question is can the LM handle more than 3A? You can simply remove the item from your cart.

This is how a basic boost regulator works. The chip includes a 3A NPN switch transistor with its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout.

Question on LM Ask Question. You can design and make your own inductor using a suitable core recuperated from old equipment if you have the knowledge, practical experience and equipment for this task.

I tried scanning through the datasheet and I fail to see its maximum input current. I’m trying to work around it. Power is conserved, and you lose a bit or more than a bit of power to the regulator i. While unlikely here, there could have been changes made, and you wouldn’t know.


Sign up using Facebook. The output switch can’t handle it. I’m actually looking into another product but I’m not sure if it’ll work again if the same inputs were used. I can’t see any specifications on the datasheet that refers to the maximum input.

Because it is a boost converter and you can’t break physics. To see why, let’s take a look at the datasheet again. The output switch current has 6A listed as an absolute max, and 3A operating. I’ve seen and looked into it.

Adjustable DC-DC Booster- LM2577

You have no obligation to purchase the product once you know the price. The output voltage is given by the following formula:. Non-isolated buck Module Rectification: These solar cells need to go inside a solar charger controller that’s why we need to boost it to 12V. 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 so, I’d have no problems with it.

It’s a good habit to get into. With the solar panel, it’s actually possible to have that kind of supply. Our price is lower than the manufacturer’s “minimum advertised price.