The LM78LXX series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications . LM78L05 ELECTRICAL CHARACTERISTICS. (VI = 10V, IO = 40mA, 0°C ≤ TJ ≤ °C, CI = µF, CO = µF, unless otherwise specified. (Note 1). Part Number: LM78L05, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor.

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Alternative Regulator for 78L LM vatasheet sheet here. You don’t need -5V for the mini. Simple shunt regulator with zener diode preregulator to greatly reduce spikes: Russell suggests using a series resistor, and I concur.

I thought I wrote about the current, but I was wrong.

LM78L05 Datasheet

Because the maximum current that this IC could supply is only upto mA. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of darasheetprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


So, the SD Card apparently has more stringent requirements for driving. Program TL to 5V with say 2 x 10k resistors.

Only ceramic caps are low in ESR,ceramics will reduce the ripple up to the level that your bulk cap can handle. For instance the Littelfuse 1. In that using a high current regulator like would be an ideal choice.

Voltage Regulator 78L05

Kaz 17k 1 23 I want to use LM78L05 as a fixed output voltage regulator as shown in the datasheetas I cited below. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load.

It datasheeg takes longer than you expect, even when you take into account Hofstadter’s Law. I saw only those values in the datasheet, not higher.

78L05 5V 100mA Voltage Regulator

Voltage regulators are very common in electronic circuits. Sign up using Email and Password.

The regulated 5V can be obtained from the output pin if the IC. My regulator is 2 meters away from the power supply filter.

The INA will work down to 2. But I have doubts. TL will add extra noise rejection.

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Add a say 10 uF and 0. What is the explanation? Then you don’t need the voltage regulator and they will last longer. Also note the Capacitors C1 and C2 are used at both the Input and output end. A TVS is still a good idea though, since you’re working in an automotive environment. That’s where the smaller capacitors take over and provide bypass. A single LM should do the trick.

I would even go a step further, and also place a zener diode on the input, so that you get a shunt pre-regulator. How can I know in further designs if an analog IC needs a bypass capacitor?

78L05 Datasheet

Some of these unwanted voltages will appear across that resistance. Please post technical questions on the forum, not by personal message. Thanks for the “longish” answer Russell, you didn’t surprise me at all.