LM7805ACT datasheet(17/28 Pages) FAIRCHILD

部件名	LM7805ACT

功能描述	3-Terminal 1A Positive Voltage Regulator

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制造商	FAIRCHILD [Fairchild Semiconductor]

网页	http://www.fairchildsemi.com

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LM78XX/LM78XXA Rev. 1.0

Electrical Characteristics (LM7812A) (Continued)

Refer to the test circuits. 0°C

< TJ < 125°C, IO = 1A, VI = 19V, CI = 0.33µF, CO = 0.1µF, unless otherwise speciﬁed.

Note:

29. 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.

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

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

VO

Output Voltage

TJ = +25°C

11.75

12.0

12.25

V

IO = 5mA to 1A, PO ≤ 15W,

VI = 14.8V to 27V

11.5

12.0

12.5

Regline

Line Regulation(29)

VI = 14.8V to 30V, IO = 500mA

–

10.0

120

mV

VI = 16V to 22V

–

4.0

120

TJ = +25°C

VI = 14.5V to 27V

–

10.0

120

VI = 16V to 22V

–

3.0

60.0

Regload

Load Regulation(29)

TJ = +25°C, IO = 5mA to 1.5A

–

12.0

100

mV

IO = 5mA to 1A

–

12.0

100

IO = 250mA to 750mA

–

5.0

50.0

IQ

Quiescent Current

TJ = +25°C

–

5.1

6.0

mA

∆IQ

Quiescent Current Change IO = 5mA to 1A

–

0.5

mA

VI = 14V to 27V, IO = 500mA

–

0.8

VI = 15V to 30V, TJ = +25°C

–

0.8

∆VO/∆T

Output Voltage Drift(30)

IO = 5mA

–

-1.0

–

mV/°C

VN

Output Noise Voltage

f = 10Hz to 100kHz, TA = +25°C

–

10.0

–

µV/VO

RR

Ripple Rejection(30)

f = 120Hz, IO = 500mA,

VI = 14V to 24V

–

60.0

–

dB

VDROP

Dropout Voltage

IO = 1A, TJ = +25°C

–

2.0

–

V

rO

Output Resistance(30)

f = 1kHz

–

18.0

–

m

Ω

ISC

Short Circuit Current

VI = 35V, TA = +25°C

–

250

–

mA

IPK

Peak Current(30)

TJ = +25°C

–

2.2

–

A

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