LM7805 datasheet(10/28 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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10 / 28 page

MC78XX/LM78XX/MC78XXA

10

Electrical Characteristics (MC7824)

(Refer to test circuit ,0

°C < TJ < 125°C, IO = 500mA, VI =33V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)

Note:

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

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

Parameter

Symbol

Conditions

MC7824

Unit

Min.

Typ. Max.

Output Voltage

VO

TJ =+25

oC23

24

25

5.0mA

≤ IO ≤ 1.0A, PO ≤ 15W

VI = 27V to 38V

22.8

24

25.25

V

Line Regulation (Note1)

Regline

TJ =+25

oC

VI = 27V to 38V

-

17

480

mV

VI = 30V to 36V

-

6

240

Load Regulation (Note1)

Regload

TJ =+25

oC

IO = 5mA to 1.5A

-

15

480

mV

IO = 250mA to 750mA

-

5.0

240

Quiescent Current

IQ

TJ =+25

oC-

5.2

8.0

mA

Quiescent Current Change

∆IQ

IO = 5mA to 1.0A

-

0.1

0.5

mA

VI = 27V to 38V

-

0.5

1

Output Voltage Drift

∆VO/∆TIO = 5mA

-

-1.5

-

mV/ oC

Output Noise Voltage

VN

f = 10Hz to 100KHz, TA =+25

oC-

60

-

µV/Vo

Ripple Rejection

RR

f = 120Hz

VI = 28V to 38V

50

67

-

dB

Dropout Voltage

VDrop

IO = 1A, TJ=+25

oC-

2

-

V

Output Resistance

rO

f = 1KHz

-

28

-

m

Ω

Short Circuit Current

ISC

VI = 35V, TA=+25

oC

-

230

-

mA

Peak Current

IPK

TJ =+25

oC-

2.2

-

A

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