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Home  Product Technical Articles   L7805CV Voltage Regulator: Pinout, Parameter, Circuit [Video]

L7805CV Voltage Regulator: Pinout, Parameter, Circuit [Video]

Author: Mia
Date: 21 Jan 2022
 29887
l7805cv pinout

L7805CV is a three terminal linear voltage regulator IC with a fixed output voltage of 5V which is useful in a wide range of applications. They are available in several IC Packages like TO-220, SOT-223, TO-263 and TO-3. Out of these, the TO-220 Package is the most commonly used one.

This blog covers the pinout, features, parameter, circuits, equivalents and other information about L7805CV.

This is a tutorial video on how to use L7805CV linear voltage regulator(11V-5V)

Catalog

L7805CV Parameters

L7805CV Pin Configuration

L7805CV CAD Models Information

L7805CV Features

L7805CV Electrical Chracteristics

L7805CV Schematic Diagram

L7805CV Block Diagram

L7805CV Application Circuit

L7805CV Functional Equivalents

L7805CV Popularity by Region

L7805CV Market Price Analysis

L7805CV Design Consideration

L7805CV Manufacturer

Component Datasheet

FAQ

Ordering & Quantity


L7805CV Parameters

Fixed Output Voltage Nom.

5V

Adjustable Output Voltage Min

-

Adjustable Output Voltage Max

-

Input Voltage Min

10V

Input Voltage Max

35V

Product Range

7805 Voltage Regulators

Output Current

1.5A

Output Type

Fixed

Linear Regulator Case Style

TO-220

No. of Pins

3 Pins

Operating Temperature Min

0°C  

Operating Temperature Max

125°C

Automotive Qualification Standard

-

MSL

 MSL 1 - Unlimited


L7805CV Pin Configuration

l7805cv pinout


L7805CV CAD Models Information

L7805CV Part Symbol   

L7805CV Footprint

L7805CV 3D Model


L7805CV Features

  • Output current in excess of 1.5A
  • Output voltage of 5V ·Internal thermal overload protection
  • Output transition Safe-Area compensation
  • Thermal overload protection
  • Short circuit protection

L7805CV Electrical Characteristics

Tj=25℃ (Vi=10V, Io=0.5A, Ci=0.33μF, Co= 0.1μF unless otherwise specified)

Symbol

Parameter

Conditions

Min

Max

Unit

Vo

Output Voltage

Vin=20V; Io=500mA

4.8

5.2

V

△Vv

Line Regulation

7.5V≤Vin≤20V; Io=0.5A

-

50

mV

△Vi

Load Regulation

5.0mA≤Io≤1.5A;

Vin=10V

-

100

mV

Iq

Quiescent Current

Vin=10V; Io=1.5A

-

6.0

mA

△q1

Quiescent Current Change

5.0mA≤Io≤1.0A;

Vin=10V

-

0.5

mA

△q2

Quiescent Current Change

7V≤Vin≤25V; Io=500mA

-

1.3

mA


L7805CV Schematic Diagram

l7805cv schematic diagram

The internal circuit of L7805 three-terminal voltage regulator IC has the functions of overvoltage protection, overcurrent protection and overheat protection, which makes its performance very stable. Therefore, it can achieve more than 1A output current.The device also has a good temperature coefficient, so the product has a wide range of applications. Local regulation can be used to eliminate the influence of noise and solve the dispersion problem related to single-point regulation. The output voltage error accuracy is ±3% and ±5%.


L7805CV Block Diagram

L7805CV Block Digram

 


L7805CV Application Circuit

L7805CV Application Circuit

L7805CV Functional Equivalents

Part Number

Description

Manufacturer

LM7805A-220MR1

POWER CIRCUITS

5V FIXED POSITIVE REGULATOR, PSFM3, METAL, TO-220, 3 PIN

TT Electronics Power and Hybrid / Semelab Limited

LM7805A-220M

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VPSFM3, METAL, TO-220, 3 PIN

TT Electronics Resistors

LM340T-5

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VBIPolar, PSFM3, PLASTIC, SFM-3

Motorola Semiconductor Products

UA7805CKCS

POWER CIRCUITS

5V FIXED POSITIVE REGULATOR, PSFM3, ROHS COMPLIANT, PLASTIC, TO-220, 3 PIN

Rochester Electronics LLC

MC7805AECT

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VBIPolar, TO-220, 3 PIN

Fairchild Semiconductor Corporation

MC7805ECT

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VBIPolar, TO-220, 3 PIN

Fairchild Semiconductor Corporation

MC7805ACTBU

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VBIPolar, PSFM3, TO-220, 3 PIN

Fairchild Semiconductor Corporation

MC7805CT-BP-HF

POWER CIRCUITS

Fixed Positive Standard Regulator,

Micro Commercial Components

UPC7805AHF-AZ

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VBIPolar, PSFM3, ISOLATED, PLASTIC, TO-220, SIP-3

NEC Electronics America Inc

KA7805TSTU

POWER CIRCUITS

Fixed Positive Standard Regulator, 5VPSFM3, TO-220, 3 PIN

Fairchild Semiconductor Corporation

 


L7805CV Popularity by Region

L7805CV Popularity by Region


L7805CV Market Price Analysis

L7805CV Market Price Analysis


L7805CV Design Consideration

The L78 series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output shortcircuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required.

However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to ensure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulator's input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.

The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtained with the arrangement is 2V greater than the regulator voltage. The circuit of  a high current voltage regulator (the figure is shown below) can be modified to provide supply protection against short circuit by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three terminal regulator. Therefore a four ampere plastic power transistor is specified.

high current voltage regulator


L7805CV Manufacturer

STmicroelectronics (ST) group was established in June 1988 as a result of the merger of SGS Microelectronics of Italy and Thomson Of France. In May 1998 SGS-Thomson Microelectronics changed its name to STmicroelectronics Limited.

It is the world's largest manufacturer of dedicated analog chips and power conversion chips, the world's largest supplier of industrial semiconductors and set-top box chips, and a world leader in discrete components, mobile phone camera modules, and automotive integrated circuits.


Component Datasheet

L7805CV Datasheet


FAQ

  • What is l7805cv?

STMicroelectronics L7805CV | 3-Pin Linear Regulator Linear Regulators.

  • What is the working principle of IC 7805?

A voltage regulator IC maintains the output voltage at a constant value. 7805 IC, a member of 78xx series of fixed linear voltage regulators used to maintain such fluctuations, is a popular voltage regulator integrated circuit (IC). The xx in 78xx indicates the output voltage it provides.

  • How do I test a 7805 with a multimeter?

Turn on the DC power supply and adjust the output voltage of about 8V or slightly larger. Or alternatively, you can use a battery 9V-12V as voltage source. Look at the voltmeter panel when you set the voltage. Prepare a DC voltmeter reading on voltage range 50V to measure the output voltage of the IC 7805.

  • How does 7805 regulate voltage?

For 7805 IC, it is +5V DC regulated power supply. This regulator IC also adds a provision for a heat sink. The input voltage to this voltage regulator can be up to 35V, and this IC can give a constant 5V for any value of input less than or equal to 35V which is the threshold limit.

 

Ordering & Quality

Photo Mfr. Part # Company Description Package PDF Qty Pricing
(USD)
L7805CV L7805CV Company:STMicroelectronics Remark:IC REG LINEAR 5V 1.5A TO220AB Package:TO-220-3
DataSheet
In Stock:42010
Buy
Price:
1+: $0.50000
10+: $0.42600
25+: $0.39800
100+: $0.29560
250+: $0.25016
500+: $0.23878
1000+: $0.17624
2500+: $0.16486
5000+: $0.15350
Buy
L7805CV-DG L7805CV-DG Company:STMicroelectronics Remark:Linear Voltage Regulator IC 1 Output 1.5A TO-220 Package:TO-220-3
DataSheet
In Stock:On Order
Buy
Price:
1+: $0.57000
10+: $0.50100
25+: $0.47040
100+: $0.35650
250+: $0.30340
500+: $0.28824
1000+: $0.21997
2500+: $0.20480
5000+: $0.19721
Buy

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