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 (LM7824A) (Continued)

Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 33V, CI = 0.33µF, CO = 0.1µF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Units

VO

Regline

Regload

IQ

∆IQ

∆VO/∆T

VN

RR

VDROP

rO

ISC

IPK

Output Voltage

TJ = +25°C

Line Regulation(35)

IO = 5mA to 1A, PO ≤ 15W,

VI = 27.3V to 38V

VI = 27V to 38V, IO = 500mA

VI = 21V to 33V

TJ = +25°C VI = 26.7V to 38V

Load Regulation(35)

VI = 30V to 36V

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 = 27.3V to 38V, IO = 500mA

Output Voltage Drift(36)

VI = 27.3V to 38V, TJ = +25°C

IO = 5mA

Output Noise Voltage

Ripple Rejection(36)

f = 10Hz to 100kHz, TA = +25°C

f = 120Hz, IO = 500mA,

VI = 28V to 38V

Dropout Voltage

Output Resistance(36)

IO = 1A, TJ = +25°C

f = 1kHz

Short Circuit Current

Peak Current(36)

VI = 35V, TA = +25°C

TJ = +25°C

23.5

23.0

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

24.0

24.0

18.0

6.0

18.0

6.0

15.0

15.0

7.0

5.2

–

–

–

-1.5

10.0

54.0

2.0

20.0

250

2.2

24.5

V

25.0

240 mV

240

240

120

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:

35. 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.

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

20

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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