LM Switching Regulator. The is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and. LM datasheet, LM circuit, LM data sheet: NSC – Switching Regulator,alldatasheet, datasheet, Datasheet search site for Electronic Components. LM Datasheet, LM PDF, LM Data sheet, LM manual, LM pdf, LM, datenblatt, Electronics LM, alldatasheet, free, datasheet.

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Sign up or log in Sign up using Google. Note that this is already greater than the mA that the chip is specified to handle. Any suggestions on how to improve this?

LM3578 Datasheet

I procured a similar circuit from here. The excessive sag in battery voltage suggests that the circuit is drawing far more current than it should during startup, datasneet the slow rise in output voltage suggests that the current is too low for some reason. They have a similar example in the ds for 15V mA,where the inductor is uH. Email Required, but never shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy dataxheet and cookie policyand that your continued use of the website is subject to these policies.


You’re overloading it, and this is going to cut into your overall efficiency, dropping as much as 0. There is a current limiting resistor,so that should prevent excessive draw,even during start up?

The datasheet only guarantees operation from 2V, so if your batteries are sagging below that, you’ll either need some sort of soft-start circuit or some extra cells to stay above the minimum datashewt voltage.

The problem I am facing is that the voltage takes about 10s. EmbSysDev 1 1 Sign up using Email and Om3578. Hello all, I have this circuit which will take an input 4×1.

Sign up using Facebook. Post as a guest Name. Your symptoms are actually a bit contradictory. Laszlo 1 I am doing this on a proper pcb with a ground datasheeg i had used a DIP version on a stripboard,with slightly better results. But if the inductor is saturating, it’ll never get there. During this time the battery voltage falls to about 1.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Will it work correctly without pin 2 connected?


After this the circuit works pretty fine.

DC motor speed control using LM

With a minimum input voltage of 3. Slow start up of LM Ask Question. The inductor in this configuration does not limit the output current. Home Questions Tags Users Unanswered. Your 1 nF capacitor sets the oscillator frequency at about 80 kHz, which is a I would focus on the coil.

In both circuits sometimes, rarely it powers up immediately,which is quite perplexing.

As I mentioned the ebay item which I procured has similar behavior during startup. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of datasheet website is subject to these policies.