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 (LM7815A) (Continued)

Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 23V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Units

VO

Output Voltage

TJ = +25°C

14.75 15.0

Regline Line Regulation(31)

IO = 5mA to 1A, PO ≤ 15W,

VI = 17.7V to 30V

VI = 17.4V to 30V, IO = 500mA

14.4

15.0

–

10.0

VI = 20V to 26V

–

5.0

TJ = +25°C VI = 17.5V to 30V

–

11.0

Regload Load Regulation(31)

VI = 20V to 26V

TJ = +25°C, IO = 5mA to 1.5A

–

3.0

–

12.0

IO = 5mA to 1A

–

12.0

IO = 250mA to 750mA

–

5.0

IQ

Quiescent Current

TJ = +25°C

–

5.2

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

–

–

VI = 17.5V to 30V, IO = 500mA

–

–

∆VO/∆T Output Voltage Drift(32)

VI = 17.5V to 30V, TJ = +25°C

IO = 5mA

–

–

–

-1.0

VN

Output Noise Voltage

f = 10Hz to 100kHz, TA = +25°C

–

10.0

RR

Ripple Rejection(32)

f = 120Hz, IO = 500mA,

VI = 18.5V to 28.5V

–

58.0

VDROP

rO

Dropout Voltage

Output Resistance(32)

IO = 1A, TJ = +25°C

f = 1kHz

–

2.0

–

19.0

ISC Short Circuit Current

IPK

Peak Current(32)

VI = 35V, TA = +25°C

TJ = +25°C

–

250

–

2.2

15.3

V

15.6

150

mV

150

150

75.0

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:

31. 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.

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

18

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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