LM7805 datasheet(11/28 Pages) FAIRCHILD

部件名	LM7805

功能描述	3-Terminal 1A Positive Voltage Regulator

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制造商	FAIRCHILD [Fairchild Semiconductor]

网页	http://www.fairchildsemi.com

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11 / 28 page

MC78XX/LM78XX/MC78XXA

11

Electrical Characteristics (MC7805A)

(Refer to the test circuits. 0

°C < TJ < 125°C, Io =1A, V I = 10V, C I=0.33µF, C O=0.1µF, unless otherwise specified)

Note:

1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken

into account separately. Pulse testing with low duty is used.

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

VO

TJ =+25

oC4.9

5

5.1

V

IO = 5mA to 1A, PO

≤ 15W

VI = 7.5V to 20V

4.8

5

5.2

Line Regulation (Note1)

Regline

VI = 7.5V to 25V

IO = 500mA

-5

50

mV

VI = 8V to 12V

-

3

50

TJ =+25

oC

VI= 7.3V to 20V

-

5

50

VI= 8V to 12V

-

1.5

25

Load Regulation (Note1)

Regload

TJ =+25

oC

IO = 5mA to 1.5A

-

9

100

mV

IO = 5mA to 1A

-

9

100

IO = 250mA to 750mA

-

4

50

Quiescent Current

IQ

TJ =+25

oC-

5.0

6

mA

Quiescent Current

Change

∆IQ

IO = 5mA to 1A

-

0.5

mA

VI = 8 V to 25V, IO = 500mA

-

0.8

VI = 7.5V to 20V, TJ =+25

oC-

-

0.8

Output Voltage Drift

∆V/∆T

Io = 5mA

-

-0.8

-

mV/ oC

Output Noise Voltage

VN

f = 10Hz to 100KHz

TA =+25

oC

-10

-

µV/Vo

Ripple Rejection

RR

f = 120Hz, IO = 500mA

VI = 8V to 18V

-68

-

dB

Dropout Voltage

VDrop

IO = 1A, TJ =+25

oC-

2

-

V

Output Resistance

rO

f = 1KHz

-

17

-

m

Ω

Short Circuit Current

ISC

VI= 35V, TA =+25

oC

-

250

-

mA

Peak Current

IPK

TJ= +25

oC-

2.2

-

A

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