LM7805 datasheet(16/28 Pages) FAIRCHILD

Part #	LM7805

Description	3-Terminal 1A Positive Voltage Regulator

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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MC78XX/LM78XX/MC78XXA

16

Electrical Characteristics (MC7812A)

(Refer to the test circuits. 0

°C < TJ < 125°C, Io =1A, V I = 19V, 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 °C

11.75

12

12.25

V

IO = 5mA to 1A, PO

≤15W

VI = 14.8V to 27V

11.5

12

12.5

Line Regulation (Note1)

Regline

VI= 14.8V to 30V

IO = 500mA

-

10

120

mV

VI= 16V to 22V

-

4

120

TJ =+25 °C

VI= 14.5V to 27V

-

10

120

VI= 16V to 22V

-

3

60

Load Regulation (Note1)

Regload

TJ =+25 °C

IO = 5mA to 1.5A

-

12

100

mV

IO = 5mA to 1.0A

-

12

100

IO = 250mA to 750mA

-

5

50

Quiescent Current

IQ

TJ =+25°C-

5.1

6.0

mA

Quiescent Current Change

∆IQ

VI = 15V to 30V, TJ=+25 °C-

0.8

mA

VI = 14V to 27V, IO = 500mA

-

0.8

IO = 5mA to 1.0A

-

0.5

Output Voltage Drift

∆V/∆T

IO = 5mA

-

-1.0

-

mV/°C

Output Noise Voltage

VN

f = 10Hz to 100KHz

TA =+25°C

-10

-

µV/Vo

Ripple Rejection

RR

f = 120Hz, IO = 500mA

VI = 14V to 24V

-60

-

dB

Dropout Voltage

VDrop

IO = 1A, TJ =+25°C-

2.0

-

V

Output Resistance

rO

f = 1KHz

-

18

-

m

Ω

Short Circuit Current

ISC

VI= 35V, TA =+25 °C

-

250

-

mA

Peak Current

IPK

TJ=+25 °C-

2.2

-

A

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