Build with LM7805 — Datasheet Specs & AI Design Help

00 — Overview

What the LM7805 does

The LM7805 is a three-terminal positive voltage regulator available in the TO-263 package. It provides a fixed 5V output with capabilities spanning up to 1.0A output current. Key specifications include a 5V nominal output, 100mV line regulation, 50mV load regulation, and 8mA quiescent current. The device features internal thermal overload, short circuit, and safe operating area protection. It is typically used in applications requiring a stable 5V supply, such as powering digital logic circuits or analog sensors where a robust, fixed voltage source is necessary.

Next step

Start building with LM7805 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for LM7805
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	—	8 mA	Tj = 25°C; Electrical Characteristics	YongYuTai datasheet, p. 2 — Electrical Characteristics
output voltage	4.8 V	5 V	5.2 V	Tj = 25°C; Electrical Characteristics	YongYuTai datasheet, p. 2 — Electrical Characteristics
output current	—	1 A	—		YongYuTai datasheet, p. 2 — Electrical Characteristics
supply voltage range	7 V	—	25 V		YongYuTai datasheet, p. 2 — Electrical Characteristics
operating temperature (abs max)	0 °C	—	125 °C	Absolute Maximum Ratings	YongYuTai datasheet, p. 1 — Absolute Maximum Ratings
dropout voltage	—	2 V	—	Electrical Characteristics	YongYuTai datasheet, p. 2 — Electrical Characteristics
output noise voltage	—	42 µV	—	10Hz ≤ f ≤ 100KHz; Electrical Characteristics	YongYuTai datasheet, p. 2 — Electrical Characteristics
output count	—	1	—		YongYuTai datasheet, p. 2 — Electrical Characteristics

02 — Alternatives

Closest matches to LM7805

L78M05ABV 2.0× lower output current, 1.5× lower operating temperature, 1.3× lower quiescent current

78M05 2.2× higher supply voltage range, 1.3× lower quiescent current, 1.2× lower operating temperature

AZ1117-5.0 3.6× higher output noise voltage, 2.0× lower dropout voltage, 1.6× lower quiescent current

L78L05AB 10.0× lower output current, 1.5× lower operating temperature, 1.3× lower quiescent current

L78M05ABDT 2.2× higher supply voltage range, 2.0× lower output current, 1.5× lower operating temperature

AZ1117C-3.3 2.0× lower quiescent current, 1.7× lower dropout voltage, 1.5× lower output voltage

CJ78L05 10.0× lower output current, 2.1× lower quiescent current, 1.5× lower operating temperature

L7805AB 4.2× lower output noise voltage, 2.2× higher supply voltage range, 1.9× lower quiescent current

03 — FAQ

Frequently asked questions

What is the dropout voltage of the LM7805?

The dropout voltage is 2 V under Electrical Characteristics conditions.

What is the maximum operating temperature for the LM7805?

The absolute maximum operating temperature is 125 °C.

What is the output count of the LM7805?

The output count is 1.

What is the maximum output current of the LM7805?

The maximum output current is 1 A.

What is the output noise voltage of the LM7805 within the frequency range of 10Hz to 100KHz?

The output noise voltage is 42 µV.

What is the output voltage of the LM7805 at Tj = 25°C?

The output voltage is 5 V at Tj = 25°C.

What is the quiescent current of the LM7805 at Tj = 25°C under Electrical Characteristics?

The quiescent current is 8 mA.

What is the maximum supply voltage for the LM7805?

The supply voltage range is 25 V.