February 23, 2021

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.

Author: Fenrigar Mezikazahn
Country: Pakistan
Language: English (Spanish)
Genre: Health and Food
Published (Last): 14 May 2018
Pages: 155
PDF File Size: 9.98 Mb
ePub File Size: 7.13 Mb
ISBN: 960-6-80360-423-4
Downloads: 64593
Price: Free* [*Free Regsitration Required]
Uploader: Samunos

Sign up using Email and Password. Dahasheet you if connect high current loads then you can expect the IC to get very hot soon and shunt down eventually.

But I have doubts. So, if you are looking for a smaller package of voltage regulator that has small current rating in TO package then this IC might be the right choice.

RussellMcMahon what is the reason for that? You may also see several different capacitances used, because large daatsheet are good for going down to the low frequencies, but become inductive at high frequencies.

The output current of this IC can go up to mA.

Voltage regulators are very common in electronic circuits. For instance the Littelfuse 1. Alternative Regulator for 78L Email Required, but never shown. Familiar regulator features such as short circuit and thermal overload protection are also provided.

Or I only need a bypass capacitor?

LM78L05 from Texas Instruments

I saw only those values in the datasheet, not higher. How much current does the load draw? You shouldn’t worry about the 25mW, lk78l05 would otherwise be dissipated in the 78L The resistor will drop the input voltage and form a low-pass filter with the LM78L05’s input capacitor.

They provide a constant output voltage for a varied input voltage.


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. I want to use LM78L05 as a fixed output voltage regulator as shown in the ,m78l05as I cited below. Features Dropout voltage typically 0.

About 25 Hz corner frequency.

If you can’t afford the zener you can at least afford the series resistor, no? Simple shunt regulator with zener diode preregulator to greatly reduce spikes: You don’t need -5V for the mini. In our case the 78L05 IC is an iconic regulator IC dztasheet finds its application in most of the projects.

The 33V TVS isn’t good enough. That’s where the smaller capacitors lm778l05 over and provide bypass. How to use 78L This is the scheme: See Fig 5 on the datasheet.

Use a uF electrolytic for more notional rejection. Only ceramic caps are low in ESR,ceramics will reduce the ripple up to the level that your bulk cap can handle.

LM78L05 Datasheet

Rated reverse standoff voltage is always lower than breakdown voltage. It is very easy and straight forward to use this IC, just connect the input in to the input voltage which has to be regulated and the ground pin to system ground.

Post as a guest Name. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current. However you might be better off with two or three x 1. Also note the Capacitors C1 and C2 are used at both the Input and output end.

SK 78L05 – PDF Datasheet – Linear Voltage Regulators In Stock |

In addition to that bulk capacitor, I need a bypass capacitor here, you say, a nF perhaps? Sign up using Facebook. Russell suggests using dataheet series resistor, and I concur.


Kaz 17k 1 23 You don’t need the -5V supply at all. Resistors in series drop the 24 V to 5V. Then you don’t need the voltage regulator and they will last longer. But when I measure the voltage between the two outputs O I note 10v, it’s right? Apart from using it as a voltage regulator it can also be used as a current regulator, short-circuit protector, booster circuit and even a variable voltage regulator. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V.

Ah, great ideas, but this is a ln78l05 sensitive application. The reason for this “required if more than xxx distance” requirement is that one of the things that the capacitor does is act datashedt a short circuit for alternating current signals that appear on the power rails and are unwanted.

Voltage Regulator 78L05

dataasheet Many of these are are specially designed for an automotive environment check spec sheet in each case and will survive in places where an LM will be destroyed or will protect your 5V powered circuit in situations where an LM would allow it to be destroyed. Please post technical questions on the forum, not by personal message. Russell McMahon k 9 These regulators also have the ability to limit current and protect when the temperature exceeds beyond junction temperature.

The quiescent current with 1A of output current and an lm87l05 differential of 5V is therefore only 30 mA. The INA will work down to 2.