LM7805A datasheet(10/23 Pages) FAIRCHILD

Part #	LM7805A

Description	3-Terminal 1A Positive Voltage Regulator

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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Electrical Characteristics (LM7808A)

(Refer to the test circuits. 0

qC TJ 125qC, IO = 1A, VI = 14V, CI = 0.33PF, CO = 0.1PF, unless otherwise specified)

Note 24: 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.

Note 25: These parameters, although guaranteed, are not 100% tested in production.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Output Voltage

VO

TJ = 25qC

7.84

8.0

8.16

V

IO = 5mA to 1A, PO d 15W, VI = 10.6V to 23V

7.7

8.0

8.3

Line Regulation

Regline

VI = 10.6V to 25V, IO = 500mA

–

6.0

80.0

mV

(Note 24)

VI = 11V to 17V

–

3.0

80.0

TJ = 25qCVI = 10.4V to 23V

–

6.0

80.0

VI = 11V to 17V

–

2.0

40.0

Load Regulation

Regload

TJ = 25qC, IO = 5mA to 1.5mA

–

12.0

100

mV

(Note 24)

IO = 5mA to 1mA

–

12.0

100

IO = 250mA to 750mA

–

5.0

50.0

Quiescent Current

IQ

TJ = 25qC–

5.0

6.0

mA

Quiescent Current Change

'IQ

IO = 5mA to 1A

–

0.5

mA

VI = 11V to 25V, IO = 500mA

–

0.8

VI = 10.6V to 23V, TJ = 25qC–

–

0.8

Output Voltage Drift (Note 25)

'VO/'TIO = 5mA

–

0.8

–

mV/

qC

Output Noise Voltage

VN

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

–

10.0

–

PV/VO

Ripple Rejection (Note 25)

RR

f = 120Hz, IO = 500mA, VI = 11.5V to 21.5V

–

62.0

–

dB

Dropout Voltage

VDROP

IO = 1A, TJ = 25qC–

2.0

–

V

Output Resistance (Note 25)

rO

f = 1KHz

–

18.0

–

m

:

Short Circuit Current

ISC

VI = 35V, TA = 25qC–

250

–

mA

Peak Current (Note 25)

IPK

TJ =25qC–

2.2

–

A

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