LM7805 Datasheet – 1A, 5V, Voltage Regulator ( PDF )

Part Number: LM7805 , LM7805CT thru LM7815ACT

Package: TO-220 Type

Function: 3-Terminal 1A, 5V, Positive Voltage Regulator

Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor is a company that designs and manufactures a wide range of semiconductor devices, including integrated circuits, power transistors, diodes, and optoelectronics.

Today, Fairchild Semiconductor is part of ON Semiconductor, a leading supplier of power management and semiconductor solutions.

Image :

What is LM7805?

The LM78XX series of three-terminal positive regulators is available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications.Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

The LM7805 has three terminals: input, output, and ground. The input terminal is connected to the unregulated input voltage source, which is typically a DC voltage between 7V and 35V. The output terminal provides a regulated 5V output voltage, which can supply a maximum current of 1A. The ground terminal is connected to the common ground of the circuit.

LM7805 PinoutLM7805 Datasheet



• Output Current up to 1 A

• Output Voltages : 5 V

• Thermal Overload Protection

• Short-Circuit Protection

• Output Transistor Safe Operating Area Protection

Other data sheets are available within the file: 7805, LM7808, LM7809, LM7810

LM7805 vs LM7905?

The LM7805 provides +5V output voltage, and the LM7905 is a voltage regulator integration circuit (IC) that provides an output voltage of -5V.

1. Voltage range:

LM7805 is designed to regulate a positive input voltage in the range of 7V to 35V, while LM7905 is designed to regulate a negative input voltage in the same range.

2. Polarity:

LM7805 is a positive voltage regulator, while LM7905 is a negative voltage regulator. This means that they have different pin configurations and cannot be used interchangeably.

3. Load current:

LM7805 can supply a maximum current of 1A, while LM7905 can also supply a maximum current of 1A, but at a negative output voltage.

4. Thermal considerations:

Both ICs have internal thermal overload protection, but because LM7905 operates in the negative voltage range, it may require additional thermal considerations to avoid damage due to overheating.

LM7805 Datasheet PDF Download

LM7805 pdf



LM7905 Datasheet PDF Download


Posts related to ‘ Voltage Regulator

Part number Description
MC7805BT 1A, 5V, Voltage Regulator
STR54041 Voltage Regulator Module – Sanken
NJM78L05UA 5V, Voltage Regulator
ME6211 CMOS LDO Voltage Regulator ( PDF )
AMS1085CD 3A, Voltage Regulator
PMLL5225B 3.0V, Voltage Regulator Diode
NX1117CADJZ LDO Voltage Regulator
SE8119AKN SE8119AKN PDF – 500mA Positive Voltage Regulator
TPS76801QD 1A, LDO, Voltage Regulator
ZSR700G 7V, Local Voltage Regulator


Related articles across the web