LM7818A 查看數據表（PDF） - Fairchild Semiconductor

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LM7818A

3-Terminal 1 A Positive Voltage Regulator

Fairchild Semiconductor 

Electrical Characteristics (LM7808A) (Continued)

Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 14V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Unit

VO

Regline

Regload

IQ

∆IQ

∆VO/∆T

VN

RR

VDROP

rO

ISC

IPK

Output Voltage

TJ = +25°C

Line Regulation(23)

IO = 5mA to 1A, PO ≤ 15W,

VI = 10.6V to 23V

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

VI = 11V to 17V

TJ = +25°C VI = 10.4V to 23V

Load Regulation(23)

VI = 11V to 17V

TJ = +25°C, IO = 5mA to 1.5A

IO = 5mA to 1A

IO = 250mA to 750mA

Quiescent Current

TJ = +25°C

Quiescent Current Change IO = 5mA to 1A

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

Output Voltage Drift(24)

VI = 10.6V to 23V, TJ = +25°C

IO = 5mA

Output Noise Voltage

Ripple Rejection(24)

f = 10Hz to 100kHz, TA = +25°C

f = 120Hz, IO = 500mA,

VI = 11.5V to 21.5V

Dropout Voltage

Output Resistance(24)

IO = 1A, TJ = +25°C

f = 1kHz

Short Circuit Current

Peak Current(24)

VI = 35V, TA = +25°C

TJ = +25°C

7.84

7.7

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

8.0

8.0

6.0

3.0

6.0

2.0

12.0

12.0

5.0

5.0

–

–

–

-0.8

10.0

62.0

2.0

18.0

250

2.2

8.16

V

8.3

80.0

mV

80.0

80.0

40.0

100

mV

100

50.0

6.0

mA

0.5

mA

0.8

0.8

–

mV/°C

–

µV/VO

–

dB

–

V

–

mΩ

–

mA

–

A

Notes:

23. 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.

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

14

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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