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 (LM7805A) (Continued)

Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 10V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Unit

VO Output Voltage

TJ = +25°C

4.9

IO = 5mA to 1A, PO ≤ 15W,

4.8

VI = 7.5V to 20V

Regline Line Regulation(19)

VI = 7.5V to 25V, IO = 500mA

–

VI = 8V to 12V

–

TJ = +25°C

VI = 7.3V to 20V

–

VI = 8V to 12V

–

Regload Load Regulation(19)

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

IO = 5mA to 1A

–

Change

VI = 8V to 25V, IO = 500mA

–

VI = 7.5V to 20V, TJ = +25°C

–

∆VO/∆T Output Voltage Drift(20) IO = 5mA

–

VN Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C

–

RR Ripple Rejection(20)

f = 120Hz, IO = 500mA, VI = 8V to 18V

–

VDROP Dropout Voltage

IO = 1A, TJ = +25°C

–

rO

Output Resistance(20) f = 1kHz

–

ISC Short Circuit Current VI = 35V, TA = +25°C

–

IPK

Peak Current(20)

TJ = +25°C

–

5.0

5.1

V

5.0

5.2

5.0

50.0

mV

3.0

50.0

5.0

50.0

1.5

25.0

9.0

100

mV

9.0

100

4.0

50.0

5.0

6.0

mA

–

0.5

mA

–

0.8

–

0.8

-0.8

–

mV/°C

10.0

–

µV/VO

68.0

–

dB

2.0

–

V

17.0

–

mΩ

250

–

mA

2.2

–

A

Notes:

19. 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.

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

12

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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