The LMK is complete 5V regulator fabricated on a single silicon chip. The available output current is greater than 1A. He is designed for. Order Number LMK STEEL or LMK STEEL. See NS Package Number K02A. Order Number LMK See NS Package Number K02C. 2. LMK STEEL/NOPB – Fixed LDO Voltage Regulator, V to 35V, 3mV. Add to compare. Image is Technical Datasheet: LMK STEEL/NOPB Datasheet.

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Regulators are a specific complete function and the pin names make some sense.

LM309K PDF Datasheet浏览和下载

The regs you buy may have 40 transistors to improve action and reduce abuse little transistor are incredibly cheap. All you really proved is that the legs are not broken-off. I’m testing them to make sure I’ve got the correct pinout and they work properly. It is not necessary to bypass the output, although this does improve transient.

This is “too small for real work” but can be detected by many meters. If you must test: With a heat sink, the effective thermal.

LM309K – LM309 5V 1A Voltage Regulator Datasheet

Haha, okay, well that explains the weird readings then! The Silicon diode hardly turns-on until you get 0. Again, I’m new to all this, but it doesn’t seem right. Thanks so much for your help!!!! I’m going to research what lm309o hell voltage regulators are and how they work so I don’t make a similar mistake down the road. A voltage regulator is several transistors working together.


I understand wanting to test. Current limiting is included to limit the peak output current to a safe value.

LMK 데이터시트(PDF) – National Semiconductor (TI)

Is this right for this transistor??? Today they have simplified down to 3 pins, which means they can use the same “frame” as power transistors.

Making some random assumptions about the side of diodes in a ‘, I get a number datasheeg a few million Ohms. Datashewt effort was expended to make these devices easy to use and minimize the number of. For these datsaheet, brand new from Jameco, do these ‘s look right?

A simple reg would include a voltage reference Zenera small transistor to compare that reference to the output voltage, and a big transistor to pass the correct amount of power through. Datasheet pdf – http: Now measure 5V from Out to Gnd. With a heat sink, the effective thermal resistance can only approach the values specified, depending on the efficiency of the sink.

So here’s my question. He is designed for local regulation on digital logic cards, eliminating the distribution problems.

Honestly I’m not sure how to tell from the data sheet. However there may be a few million Ohms of internal leakage in a large part. Your 3Meg to 20Meg numbers are close enough. However you bought from a very reputable source, reputable chips have defect rates below 1 in a million, you can just assume the parts are good until you wire them up and check ALL other possible errors.


Haha So are km309k readings what you’d expect to see from these components? Note that the battery has to hold at least 7V into the part, because the minimum In-Out voltage is 1.

That was a Clue. Get the polarity right!!

How to test LMK and LMK transistors

While PCs dataasheet don’t have bread-slots, with transistors and regulators you gotta go by the part number. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating. And this still does not prove that your ‘ can carry the BIG current that you paid the big bucks for. But a toaster, a radio, and a Catasheet are all “boxes with wall-plugs”, yet not the same thing.

It is not necessary to bypass the output, although this does improve transient response somewhat.

Input bypassing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. November 19, On some regs this is plain simple resistance, no diodes.