MC7818A 查看數據表（PDF） - Fairchild Semiconductor

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MC7818A

3-Terminal 1A Positive Voltage Regulator

Fairchild Semiconductor 

MC78XX/LM78XX/MC78XXA

Electrical Characteristics (MC7812)

(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =19V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)

Parameter

Output Voltage

Line Regulation (Note1)

Load Regulation (Note1)

Quiescent Current

Quiescent Current Change

Output Voltage Drift

Output Noise Voltage

Ripple Rejection

Dropout Voltage

Output Resistance

Short Circuit Current

Peak Current

Symbol

Conditions

VO

Regline

Regload

IQ

∆IQ

∆VO/∆T

VN

RR

VDrop

rO

ISC

IPK

TJ =+25 oC

5.0mA ≤ IO≤1.0A, PO≤15W

VI = 14.5V to 27V

TJ =+25 oC

VI = 14.5V to 30V

VI = 16V to 22V

TJ =+25 oC

TJ =+25 oC

IO = 5mA to 1.5A

IO = 250mA to 750mA

IO = 5mA to 1.0A

VI = 14.5V to 30V

IO = 5mA

f = 10Hz to 100KHz, TA =+25 oC

f = 120Hz

VI = 15V to 25V

IO = 1A, TJ=+25 oC

f = 1KHz

VI = 35V, TA=+25 oC

TJ = +25 oC

MC7812

Unit

Min. Typ. Max.

11.5 12 12.5

11.4 12 12.6

V

- 10 240

mV

- 3.0 120

- 11 240

mV

- 5.0 120

- 5.1 8.0 mA

- 0.1 0.5

mA

- 0.5 1.0

-

-1

- mV/ oC

- 76 - µV/Vo

55 71 -

dB

-

2

-

V

- 18 -

mΩ

- 230 -

mA

- 2.2 -

A

Note:

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.

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