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.
|Country:||Moldova, Republic of|
|Published (Last):||23 February 2011|
|PDF File Size:||1.69 Mb|
|ePub File Size:||11.22 Mb|
|Price:||Free* [*Free Regsitration Required]|
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. The excessive sag in battery voltage suggests that the circuit is 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.
Laszlo 1 I am doing this on a proper pcb with a ground plane,initially i had used a DIP version on a stripboard,with slightly better results. Sign up using Email and Password. Your symptoms are actually a bit contradictory.
LM Datasheet PDF – National ->Texas Instruments
In both circuits sometimes, rarely it powers up immediately,which is quite perplexing. There is a current limiting resistor,so that should prevent excessive draw,even during start up?
Your 1 nF capacitor sets the oscillator frequency at about 80 kHz, which is a You’re overloading it, and this is going to datasheett into your overall efficiency, dropping as much as 0. Note that this is already greater than the mA that the chip is specified to handle. They have a similar example in the ds for 15V mA,where the inductor datashset uH.
Sign up or log in Sign up using Google. Post as a guest Name. After this the circuit works pretty fine.
Home Questions Tags Users Unanswered. I procured a similar circuit from here.
Email Required, but never shown. The inductor in this configuration does not limit the output current. Any suggestions on how to improve this? Slow start up of LM Ask Question.