LM7818ACT 查看數據表（PDF） - Fairchild Semiconductor

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LM7818ACT

3-Terminal 1 A Positive Voltage Regulator

Fairchild Semiconductor 

Electrical Characteristics (LM7809A) (Continued)

Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 15V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Units

VO Output Voltage

TJ = +25°C

Regline Line Regulation(25)

IO = 5mA to 1A, PO ≤ 15W,

VI = 11.2V to 24V

VI = 11.7V to 25V, IO = 500mA

VI = 12.5V to 19V

TJ = +25°C VI = 11.5V to 24V

Regload Load Regulation(25)

VI = 12.5V to 19V

TJ = +25°C, IO = 5mA to 1.5A

IO = 5mA to 1A

IO = 250mA to 750mA

IQ

Quiescent Current

TJ = +25°C

∆IQ Quiescent Current Change IO = 5mA to 1A

VI = 12V to 25V, IO = 500mA

∆VO/∆T Output Voltage Drift(26)

VI = 11.7V to 25V, TJ = +25°C

IO = 5mA

VN Output Noise Voltage

RR Ripple Rejection(26)

f = 10Hz to 100kHz, TA = +25°C

f = 120Hz, IO = 500mA,

VI = 12V to 22V

VDROP

rO

Dropout Voltage

Output Resistance(26)

IO = 1A, TJ = +25°C

f = 1kHz

ISC Short Circuit Current

IPK

Peak Current(26)

VI = 35V, TA = +25°C

TJ = +25°C

8.82

9.0

9.16

V

8.65

9.0

9.35

–

6.0

90.0

mV

–

4.0

45.0

–

6.0

90.0

–

2.0

45.0

–

12.0

100

mV

–

12.0

100

–

5.0

50.0

–

5.0

6.0

mA

–

–

0.5

mA

–

–

0.8

–

–

0.8

–

-1.0

–

mV/°C

–

10.0

–

µV/VO

–

62.0

–

dB

–

2.0

–

V

–

17.0

–

mΩ

–

250

–

mA

–

2.2

–

A

Notes:

25. 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.

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

15

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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