LM2940 PDF

The LM/LMC positive voltage regulator features the ability to source 1A of output current with a dropout volt- age of typically V and a maximum of. The LMN/LMC positive voltage regulator. 2• Dropout Voltage Typically V @IO = 1A features the ability to source 1A of output current with. The LM/LMC positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically V and a maximum of 1V.

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Nov 13, 4. Quote of the day. See the LM datasheet for details.

Schematic of the regulation circuit. Sign In or Register to comment. KevinWhite, the 5V net label represents the lowest measured output from the rectifier lm9240.

I was using the above to supply 5v to my Atmegap-pu project in my automotive environment for controlling the signal that turns on some lights via Mosfet.

This capacitor must be rated over the same operating temperature range as the regulator and. If not then what am I looking for exactly.

Nov 13, 3. Perhaps I have misunderstood this specification? I was reading it on my break and was in a hurry. Km2940 you look at page 18 in its datasheet the ESR for the uF, 6. Everything works until a cloud appears. Oct 26, 15 0. Whether this is really what they intend is unknown. Lk2940 Russel, thanks for the feedback. The average voltage at the input is around 6.


Ok, so I would also have to change both input and output caps as well since I am only using a 10uf axial cap and a. NB – in the pdf you cite they say: According to what I have read on these forums, a uf cap is recommended on the input side instead of the 47uf which is recommended. Once the SX28 turns on, it displays a sequence on an 7 segment display, then rotates the motor for 2 to 5 seconds. LM will give all sorts of problems if you dont have input and output caps both connected, and pretty close to the pins of the regulator.

Please see updated question with attached schematic. I have a bag of LM 5v here that I just stopped using because I got sick of their fussy operation. Typically, these limits can be maintained with a solid tantalum polarized capacitor. Now my confusion starts with ESR and capacitor type So low dropout regulators must use a pretty big capacitor at their output to prevent oscillation.

Any advice or pointers will be much appreciated! When everything is hooked up, the will stop putting out power on first boot. 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 to these policies.

Ml2940 11, 5, 1, Nov 14, 8. You won’t have to worry about dropout until you get pretty far down there, and you can use a super capacitor l,2940 battery to handle low voltage situations. This chip predates big cheap ceramic caps, I think. Read 1 time previous topic – next topic. Case markings indicate 5v LMT- 5. However, it has much stricter requirements for its input and output capacitors, which must be adhered to. Nov 14, 7. All signs point to this being a 5v regulator.


LM Regulator | Modern Device

Post as a guest Name. In general, the LM I hope you know that the 2 are not properly the same parts, both are 5V regulators but the OKI is switching power supply, while the LM is linear one, the main difference for your use is heat dissipated.

The suggested solution in that appnote, figure 7 vs. Sign up using Email and Password.

I just thought the OKIsr might be a little overkill in terms of cost for other similar stuff down the road. There is one circuit that detects the power from the solar array and when over 13v, it turns on the SX28 circuitry which controls a small 6v DC motor using a mosfet and PWM. Nov l2940, You know, the should work fine down to 7.

Practical Uses of Instrumentation Amplifiers Basic refresher on lm294 amplifiers, followed by a several real world applications in which an engineer would find this circuit.