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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TI released a revised version in April The IC has a wide input voltage range 3. Digikey might be a good place to start. Question on LM Ask Question.

Adjustable DC-DC Booster- LM2577

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Find a different, more modern part with synchronous rectification, and while you’re at it, reevaluate whether you really need datashee use a 3V source. The supply of our tested solar dqtasheet had a voltage of V and a current of 6A. Non-isolated buck Module Rectification: Henry Lachica 8 6. These solar cells need to go inside a solar charger controller that’s why we need to boost it to 12V. 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.

Post as a guest Name. Several things to look at here The output switch can’t handle it. While unlikely here, there could have been changes made, and you wouldn’t know.

Only registered users can write reviews. HenryLachica The seller meant exactly what they said. 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: If you read the datasheet of the LM, it has an absolute maximum output switch current of 6.


The LM integrated circuit from National Semiconductor is a useful IC that provides all of the power and control functions for a simple boost step-upflybackand forward converter switching regulator. 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.

The input capacitor C1 should be a good quality, low ESR, 0. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Email Required, but never shown.

The output switch current has 6A listed as an absolute max, and 3A operating. Welcome to Elecrow Online Store. This module uses the adjustable output version, it would facilitate your application and be your good assistant in your debugging.

If you’re trying to get 15V at 3A, this part is not going to do it. It’s a good habit to get into.

LM Datasheet(PDF) – National Semiconductor (TI)

The UC – a pin to pin compatible replacement available eatasheet Texas Instruments can also be used. Power is conserved, and you lose a bit or more than a bit of power to the regulator i.

Please, log in or register. What I actually need: See Matt Young’s answer above. I need to boost a 3V source to 15V and this is nicely done by the product.

Sign up using Facebook. Even if the switch was up to it, the 3V source would have to supply over 20A. I tried scanning through the datasheet and I fail to see its maximum input current. Put another way, you’re darasheet 9W into the regulator, and getting 6W of useful power out.


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.

The version you linked to is dated You have no obligation to purchase the product once you know the price. First, always get your datasheet straight from the manufacturer. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policysatasheet that your continued use of the website is subject to these policies.

LMADJ Datasheet(PDF) – National Semiconductor (TI)

So what did the seller mean by Input Current: If it isn’t possible to actually do it with this product, what are my other alternatives? The schematic is simple, easy to build and cost effective, producing 12V from a 5V unregulated supply with a maximum output current of mA.

You must have JavaScript enabled in your browser to utilize the functionality of this website. It’s not going to work.

The source is actually a solar panel. Non-synchronous rectification Input voltage: With the solar panel, it’s actually possible to have that kind of supply. Because it is a boost converter and you can’t break physics. I bought this product that has a LM in it and the specifications indicated by the seller dataaheet it can have a maximum output current of 2A with a maximum input current of 3A. I only get 0.