Introduction to LM340T5

Hello, readers welcome to the new post. We will discuss Introduction to LM340T5. It positive volts regulator used for current limiting circuits comes with three pinouts. It is also used for thermal shutdown, and surface area replacement projects. Through the use of a heat sink, this device has the ability to provide the one-ampere current.

As it is used for fixed volts regulator through the use of certain circuits provides variable output voltages. In this post, we will discuss its working pinout and some other related parameters. So let’s get started with Introduction to LM340T5

Table of Contents

The LM340T5 is a fixed voltage regulator and has the ability to operate the load of one-ampere current.
It is used for different devices as fixed voltage regulators such as on card regulations to remove the noise and also used for single-point regulation

it also has features to provide the variable volts and is used for applications where adjustable volts needed
There are certain levels of measures are taken to make simple circuits for regulators to use less outer components.
It is not compulsory to make a bypass for output through it enhances transient response.
Input at bypass is used if a regulator is exists away from the filter capacitor of the supply
The voltage range for regulators is five twelve and fifteen volts in TO-3 packaging.
Common packages for this regulator are TO-3 Metal Can Package TO-263 Surface-Mount Package TO-220 Power Package 3-Lead SOT-223 Package

LM340T5 Features

Some features are listed here

It has output transistor safe area protection
It has an inner shortcircuit for current limiting
Inner thermal overload safety used
Its voltage regulation is about 0.3 percent
Line regulation is about 0.01 percent
It used to handle the one-ampere load

LM340T5 Pinout

It has three pins
O/P: Here output of the regulator is obtained
GND: in this pin ground linked
INput: Positive supply is connected as an input

LM340T5 Voltage Regulator Working

The LM340T5 is a category of regulator that is used in different projects. Its output current can be one ampere. But its linear structure losses heat. To save this component from the heating effect heat absorbers are used.
Let us suppose that we have an input supply of 9V and a current of one amper then about four wat power will be dissipated which can be high for a high power supply. So we required a larger heat sink to handle this power
Through using the different components to this regulator can be used in different configurations such as constant current regulator, variable voltage regulator and fixed voltage regulator

LM340T5 Electrical Characteristics

Some electrical features of the regulator are mentioned here

Features	Parameters	5V O/P	12V o/p	15V o/p	Units
Output Voltage	TJ = 25˚C	5	12	15	V
Line Regulation	IO = 500 mA	7.5 ≤ VIN ≤ 20	14.8 ≤ VIN ≤ 27	17.9 ≤ VIN ≤ 30	V
Load Regulation	TJ = 25˚C	10	12	12	V
Quiescent Current	TJ = 25˚C	6	6	6	mA
Quiescent Current Change	5 mA ≤ IO ≤ 1A	0.5	0.5	0.5	mA
Output Noise Voltage	TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz	40	75	90	uV
Ripple Rejection	TJ = 25˚C, f = 120 Hz, IO = 1A	80	72	70	V
Dropout Voltage	TJ = 25˚C, IO = 1A	2	2	2	v