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 (LM7805)

Refer to the test circuits. -40°C < TJ < 125°C, IO = 500mA, VI = 10V, CI = 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(1)

5mA ≤ IO ≤ 1A, PO ≤ 15W,

VI = 7V to 20V

TJ = +25°C VO = 7V to 25V

Load Regulation(1)

VI = 8V to 12V

TJ = +25°C IO = 5mA to 1.5A

IO = 250mA to 750mA

Quiescent Current

TJ = +25°C

Quiescent Current Change IO = 5mA to 1A

Output Voltage Drift(2)

VI = 7V to 25V

IO = 5mA

Output Noise Voltage

Ripple Rejection(2)

f = 10Hz to 100kHz, TA = +25°C

f = 120Hz, VO = 8V to 18V

Dropout Voltage

Output Resistance(2)

IO = 1A, TJ = +25°C

f = 1kHz

Short Circuit Current

Peak Current(2)

VI = 35V, TA = +25°C

TJ = +25°C

4.8

4.75

–

–

–

–

–

–

–

–

–

62.0

–

–

–

–

5.0

5.0

4.0

1.6

9.0

4.0

5.0

0.03

0.3

-0.8

42.0

73.0

2.0

15.0

230

2.2

5.2

V

5.25

100

mV

50.0

100

mV

50.0

8.0

mA

0.5

mA

1.3

–

mV/°C

–

µV/VO

–

dB

–

V

–

mΩ

–

mA

–

A

Notes:

1. 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.

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

3

LM78XX/LM78XXA Rev. 1.0

www.fairchildsemi.com

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