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. There is a current limiting resistor,so that should prevent excessive draw,even during start up? Home Questions Tags Users Unanswered. Sign up using Email and Password.

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By dagasheet “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Email Required, but never shown. 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 operating voltage.


But if the inductor is saturating, it’ll never get there. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. After this the circuit works pretty fine.

Post Your Answer Discard 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 the website is subject datasheey these policies. With a minimum input voltage of 3. EmbSysDev 1 1 Post as a guest Name.

LM 데이터시트(PDF) – National Semiconductor (TI)

Any suggestions on how to improve this? During this time the battery voltage falls to about 1. Your 1 nF capacitor sets the oscillator frequency at about 80 kHz, which is a Will it work correctly without pin 2 connected?

They have a similar example in the ds for 15V mA,where the inductor is uH. In both circuits dahasheet, rarely it powers up immediately,which is quite perplexing.

Sign up using Facebook. You’re overloading it, and this is going to cut into your overall efficiency, dropping as much as 0. I procured a similar circuit from here. Slow start up of LM Ask Question. The excessive sag in battery voltage suggests that the circuit datasyeet drawing far more current than it should during startup, while the slow rise in output voltage suggests that the current is too low for some reason. Note that this is already greater than the mA that the chip is specified to handle.


Your symptoms are actually a bit contradictory. As I mentioned the ebay item which I procured has similar behavior during startup.

The problem I am facing is that the voltage takes about 10s. I would focus on the coil. Laszlo 1 I am doing this on a proper pcb with a ground plane,initially datashdet had used a DIP version on a stripboard,with slightly better results.

Hello all, I have this circuit which will take an input 4×1. The inductor in this configuration does not limit the output current.