Fixed Voltage Regulators ICs with accurate Datasheets

Hello Engineers, we need to get desired or fixed voltage supply many times in many applications while designing some applications or circuits. For this, we need to use voltage regulators. So in this post, I am going to tell you in detail about the basic types of fixed voltage regulators and their classifications on the basis of their properties. So leat’s get started with our topic ” Positive Fixed voltage regulators” and types of fixed voltage regulators with respect to their output properties. Already there are some awesome sites online like the alldatasheet.com. But, here in this post I am focussing and summarising a brief datasheet about all fixed voltage regulators ICs. Also, a small PDF book at the end of this post for DATASHEETS.

What is a voltage regulator?

• A voltage regulator is a circuitry/devices or Integrated Circuit components that provide us DC to DC constant stabilized and regulated voltage output with the independence of how power is to be drawn through it.
• Voltage regulators may be used in a wide variety of applications with or without support active or passive components. But some of the most common applications are:-

1. Computer SMPS power supplies in which first the AC inputs are rectified then stabilized and regulated by the voltage regulation circuitries and ICs.
2. DC adapters and mobile phone chargers all are applications where we need a regulated power supply with respect to voltage as well as current.
3. The automotive industry, The battery charger in vehicles as well as other components that work via a regulated output like AC system, phone charging, Power coming from alternator also needed to regulated, etc.

So let’s discuss basic voltage regulator with respect to output properties with circuit diagram.

Classification of the fixed voltage regulator ICs

Fixed Voltage regulators:

• Fixed voltage regulators are those circuits or Integrated Circuits(ICs) that are used to get desired fixed voltage output with a constant current and fixed output voltage supply.
• The Fixed voltage regulators can be of Positive voltage regulator types or negative voltage regulator types.
• These are more widely used as in most electronic devices like DC adapters, SMPSs, TV SMPS, Mobile phone chargers, etc we need only fixed voltage outputs.
• I am going to discuss some kinds of fixed voltage regulator 3 pin transistor ICs.All those ICs come in LM78XX/MC78XX series.
• All having internal current limiting, thermal shut down and safe operating area protection, making them essentially indestructible. Usually, they are rated up to 1A but practically the can give current output up to 1.2A or even 1.5A with proper heat management like using proper heat sinking elements.

1. LM7805 VOLTAGE REGULATOR

The LM7805 voltage regulator is a type of 3 pins positive voltage regulator IC that has TO-220 packaging with a fixed 5v voltage output that is required in a lot of applications. It has inbuilt internal current limiting, thermal shut down and inbuilt safe operation protection, making it essentially indestructible. Usually, they are rated up to 1A so theoretically its 5w but can go some 100 to 300 ma above the rated value with proper heatsinking.

VOLTAGE REGULATOR DIAGRAM AND PACKAGING INFO

MINIMUM AND MAX. RATINGS FOR THE LM7805 VOLTAGE REGULATOR

Parameters	Symbol	MIN	MAX	Unit
INPUT VOLTAGE	Vi	6.5	35	V
OUTPUT VOLTAGE	Vo	4.85	5.15	V
PEAK CURRENT	Ipk		2.2	A
OPERATING TEMPERATURE RANGE	Topr	0	125	‘C
STORAGE TEMP. RANGE	Tstg	-65	~150	‘C
SHORT CIRCUIT CURRENT	Isc		230	ma

5v power supply using LM7805

Above is the circuit diagram showing a 5v power supply using an LM7805 Voltage regulator.

2.LM7806/LM7806I VOLTAGE REGULATOR and its DATASHEET

It’s also a 3-terminal positive voltage regulator with TO-220 Package having 6v standard voltage output with peak current output of 1.8A with proper heat sinking. Its maximum output power is up to 15w max.

Parameters	Symbols	Min	Max	Unit
INPUT VOLTAGE	Vi	8	35	V
OUTPUT VOLTAGE	Vo	5.75	6.25 6.3	V
PEAK CURRENT	Ipk		1.8	A
SHORT CIRCUIT CURRENT	Isc		250	ma
VOLTAGE DROP	Vd	2	2	V
OPERATION TEMPERATURE	Topr	-65	~125	‘C

3.LM7808 Fixed VOLTAGE REGULATOR and datasheet

LM7808 is a Fixed voltage regulator which provides 8v regulated output voltage. Similar to others, it also has TO-220 Packaging .and a rated current of 1A but can go up to 1.2-1.5A. It has internal thermal overload thermal protection.

Parameter	Symbol	Min	Max	Unit
INPUT VOLTAGE	Vi	10	35	V
OUTPUT VOLTAGE	Vo	7.7	8.3	V
PEAK CURRENT	Ipk		1.5	A
SHORT CIRCUIT CURRENT	Istc		250	ma
OPERATION TEMPERATURE	Topr	0	~150	‘C

4.LM7809 VOLTAGE REGULATOR AND DATASHEET

The LM7809/MC7809 voltage regulator is a type of 3 pins positive voltage regulator IC that has TO-220 packaging with a fixed 5v voltage output that is required in a lot of applications. It has inbuilt internal current limiting, thermal shut down and inbuilt safe operation protection, making it essentially indestructible. Usually, they are rated up to 2.2 A peak current so it’s approx. up to 18w max.

Parameter	Symbol	Min	Max	Unit
INPUT VOLTAGE	Vi	11	35	V
OUTPUT VOLTAGE	Vo	8.65	9.3	V
PEAK CURRENT	Ipk		2.2	A
SHORT CIRCUIT CURRENT	Istc		250	ma
OPERATION TEMPERATURE	Topr	0	~150	‘C

9v Power supply using LM7809/7809I/MC7809RI

5.LM7812 VOLTAGE REGULATOR/DATASHEET

LM7812 is a Fixed voltage regulator which provides 12v regulated output voltage. Similar to others, it also has TO-220 Packaging .and a rated current of 1 but can go up to Max.2.2A. It has internal thermal overload thermal protection.

LM7812/MC7812/LM7812I STRUCTURE AND PINOUTS

Parameter	Symbol	Min	Max	Unit
INPUT VOLTAGE	Vi	14	35	V
OUTPUT VOLTAGE	Vo	11.76	12.24	V
PEAK CURRENT	Ipk		2.2	A
SHORT CIRCUIT CURRENT	Istc		350	ma
OPERATION TEMPERATURE	Topr	0	~150	‘C

12V POWER SUPPLY USING LM7812

6.LM7815/LM7815I VOLTAGE REGULATOR /CIRCUIT/DATASHEET

LM7815 is a Fixed positive voltage regulator which provides 15v regulated output voltage. Similar to others, it also has TO-220 Packaging .and a rated current of 1 A but can go up to Max.2.2A. It has internal thermal overload thermal protection.

PINOUTS/STRUCTURAL AND PACKAGING DETAILS

15V POWER SUPPLY USING LM7815

Parameter	Symbol	Min	Max	Unit
INPUT VOLTAGE	Vi	18	35	V
OUTPUT VOLTAGE	Vo	14.5	15.75	V
PEAK CURRENT	Ipk		2.2	A
SHORT CIRCUIT CURRENT	Istc		250	ma
OPERATION TEMPERATURE	Topr	–	–	‘C

7.LM7818 VOLTAGE REGULATOR

This is a 3 terminal positive voltage regulator that gives 18v output, its max.output current is rated at 2.1A. It also has internal thermal overload protection, internal short circuit current limiting.

8.LM7824/LM7824I VOLTAGE REGULATOR DATASHEET/PINOUTS

Its another kind of positive voltage regulator that gives an output of 24V DC with a peak current of 2.2A.Rest properties are all same as above mention voltage regulators.

Parameter	Symbol	Min	Max	Unit
INPUT VOLTAGE	Vi	30	35	V
OUTPUT VOLTAGE	Vo	23	25	V
PEAK CURRENT	Ipk		2.2	A
SHORT CIRCUIT CURRENT	Istc		230	ma
OPERATION TEMPERATURE	Topr	0	~125	‘C
VOLTAGE DROP	VD	1	2	V

Negative Voltage Regulators

• They are also a type of 3-pin voltage regulator which comes in negative voltage regulators category that provides us negative voltage outputs. Series for negative voltage regulators starts from 79xx and alike Postive regulator series they also come in TO-220 packaging.
• They are required in circuits where we need positive input VCC as well as negative VCC input to drive various logic ICs.
• Some common kinds of available are LM 7905, LM7909, LM7912.

Download a PDF by Electroinvention for these Datasheets Absolutely free here: Download PDF book Fixed voltage regulators datasheets and circuit diagrams.

I hope you guys liked it very much since this is a complete package of all fixed voltage regulators series with their explanation/diagram and circuitries and abstracted form of the datasheet. If you guys liked it please comment here and tell me about it. Good day ahead.

5 Amp high Power Variable Power supply 0- 28 V DC