LM7812A datasheet(4/28 Pages) FAIRCHILD

No. de pieza	LM7812A

Descripción Electrónicos	3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS

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Fabricante Electrónico	FAIRCHILD [Fairchild Semiconductor]

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LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)

LM7808/I/R/RI ELECTRICAL CHARACTERISTICS

(Refer to test Circuit, TMIN <TJ< TMAX, IO = 500mA, VI = 14V, CI = 0.33

µF, C

O= 0.1

µF, unless otherwise specified)

* TMIN <TJ <TMAX

LM78XXI/RI: TMIN= - 40

°C, T

MAX = +125

°C

LM78XX/R: TMIN= 0

°C, T

MAX= +125

°C

* 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.

LM7808I

LM7808

Min Typ

Max

Min

Typ

Max

TJ =+25

°C

7.7

8.0

8.3

7.7

8.0

8.3

Output Voltage

VO

5.0mA

≤ I

O

≤ 1.0A, P

O

≤ 15W

VI = 10.5V to 23V

VI = 11.5V to 23V

7.6

8.0

8.4

7.6

8.0

8.4

V

VI = 10.5V to 25V

5.0

160

5.0

160

VI = 11.5V to 17V

2.0

80

2.0

80

IO = 5.0mA to 1.5A

10

160

10

160

IO= 250mA to 750mA

5.0

80

5.0

80

Quiescent Current

IQ

TJ =+25

°C

5.0

8

5.0

8

mA

IO = 5mA to 1.0A

0.05

0.5

0.05

0.5

Quiescent Current Change

∆I

Q

VI = 10.5A to 25V

0.5

1.0

mA

VI = 11.5V to 25V

0.5

1.0

Output Voltage Drift

∆V

O/

∆T IO = 5mA

-0.8

mV/

°C

Output Noise Voltage

VN

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

°C

52

µV/Vo

Ripple

Rejection

RR

f = 120Hz, VI= 11.5V to 21.5

56

73

56

73

dB

Dropout Voltage

VD

IO = 1A, TJ=+25

°C

2

V

Output Resistance

RO

f = 1KHz

17

m

Ω

Short Circuit Current

ISC

VI= 35V, TA =+25

°C

230

mA

Peak Current

IPK

TJ =+25

°C

2.2

A

Characteristic

Symbol

Test Conditions

Unit

Line Regulation

Load Regulation

∆V

O

∆V

O

TJ =+ 25

°C

TJ = +25

°C

mV

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LM7812A Datasheet(PDF) 4 Page - Fairchild Semiconductor

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