LM7805 datasheet(4/28 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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4 / 28 page

MC78XX/LM78XX/MC78XXA

4

Electrical Characteristics (MC7808)

(Refer to test circuit ,0

°C < TJ < 125°C, IO = 500mA, VI =14V, 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

MC7808

Unit

Min.

Typ. Max.

Output Voltage

VO

TJ =+25

oC

7.7

8.0

8.3

5.0mA ≤ IO ≤ 1.0A, PO ≤ 15W

VI = 10.5V to 23V

7.6

8.0

8.4

V

Line Regulation (Note1)

Regline

TJ =+25

oC

VI = 10.5V to 25V

-

5.0

160

mV

VI = 11.5V to 17V

-

2.0

80

Load Regulation (Note1)

Regload

TJ =+25

oC

IO = 5.0mA to 1.5A

-

10

160

mV

IO= 250mA to 750mA

-

5.0

80

Quiescent Current

IQ

TJ =+25

oC-

5.0

8.0

mA

Quiescent Current Change

∆IQ

IO = 5mA to 1.0A

-

0.05

0.5

mA

VI = 10.5A to 25V

-

0.5

1.0

Output Voltage Drift

∆VO/∆TIO = 5mA

-

-0.8

-

mV/ oC

Output Noise Voltage

VN

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

oC-

52

-

µV/Vo

Ripple Rejection

RR

f = 120Hz, VI= 11.5V to 21.5V

56

73

-

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

-

230

-

mA

Peak Current

IPK

TJ =+25

oC-

2.2

-

A

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