LM7818CT datasheet(9/28 Pages) FAIRCHILD

Part #	LM7818CT

Description	3-Terminal 1A Positive Voltage Regulator

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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LM78XX/LM78XXA Rev. 1.0

Electrical Characteristics (LM7815) (Continued)

Refer to the test circuits. -40°C

< TJ < 125°C, IO = 500mA, VI = 23V, CI = 0.33µF, CO = 0.1µF, unless otherwise speciﬁed.

Notes:

13. 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.

14. These parameters, although guaranteed, are not 100% tested in production.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VO

Output Voltage

TJ = +25°C

14.4

15.0

15.6

V

5mA

≤ IO ≤ 1A, PO ≤ 15W,

VI = 17.5V to 30V

14.25

15.0

15.75

Regline

Line Regulation(13)

TJ = +25°C VI = 17.5V to 30V

–

11.0

300

mV

VI = 20V to 26V

–

3.0

150

Regload

Load Regulation(13)

TJ = +25°C IO = 5mA to 1.5A

–

12.0

300

mV

IO = 250mA to 750mA

–

4.0

150

IQ

Quiescent Current

TJ = +25°C

–

5.2

8.0

mA

∆IQ

Quiescent Current Change

IO = 5mA to 1A

–

0.5

mA

VI = 17.5V to 30V

–

1.0

∆VO/∆T Output Voltage Drift(14)

IO = 5mA

–

-1.0

–

mV/°C

VN

Output Noise Voltage

f = 10Hz to 100kHz, TA = +25°C

–

90.0

–

µV/VO

RR

Ripple Rejection(14)

f = 120Hz, VI = 18.5V to 28.5V

54.0

70.0

–

dB

VDROP

Dropout Voltage

IO = 1A, TJ = +25°C

–

2.0

–

V

rO

Output Resistance(14)

f = 1kHz

–

19.0

–

m

Ω

ISC

Short Circuit Current

VI = 35V, TA = +25°C

–

250

–

mA

IPK

Peak Current(14)

TJ = +25°C

–

2.2

–

A

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