KA7812 datasheet(2/28 Pages) FAIRCHILD

номер детали	KA7812

подробное описание детали	3-Terminal 1A Positive Voltage Regulator

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производитель	FAIRCHILD [Fairchild Semiconductor]

домашняя страница	http://www.fairchildsemi.com

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KA78XX/KA78XXA

2

Absolute Maximum Ratings

Electrical Characteristics (KA7805/KA7805R)

(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =10V, CI= 0.33

µF, CO=0.1µF, unless otherwise specified)

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.

Parameter

Symbol

Value

Unit

Input Voltage (for VO = 5V to 18V)

(for VO = 24V)

VI

35

40

V

Thermal Resistance Junction-Cases (TO-220)

R

θJC

5

°C/W

Thermal Resistance Junction-Air (TO-220)

R

θJA

65

°C/W

Operating Temperature Range (KA78XX/A/R)

TOPR

0 ~ +125

°C

Storage Temperature Range

TSTG

-65 ~ +150

°C

Parameter

Symbol

Conditions

KA7805

Unit

Min.

Typ.

Max.

Output Voltage

VO

TJ =+25

oC

4.8

5.0

5.2

5.0mA ≤ Io ≤ 1.0A, PO ≤ 15W

VI = 7V to 20V

4.75

5.0

5.25

V

Line Regulation (Note1)

Regline

TJ=+25

oC

VO = 7V to 25V

-

4.0

100

mV

VI = 8V to 12V

-

1.6

50

Load Regulation (Note1)

Regload

TJ=+25

oC

IO = 5.0mA to1.5A

-

9

100

mV

IO =250mA to 750mA

-

4

50

Quiescent Current

IQ

TJ =+25

oC-

5.0

8.0

mA

Quiescent Current Change

∆IQ

IO = 5mA to 1.0A

-

0.03

0.5

mA

VI= 7V to 25V

-

0.3

1.3

Output Voltage Drift

∆VO/∆TIO= 5mA

-

-0.8

-

mV/ oC

Output Noise Voltage

VN

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

oC-

42

-

µV/VO

Ripple Rejection

RR

f = 120Hz

VO = 8V to 18V

62

73

-

dB

Dropout Voltage

VDrop

IO = 1A, TJ =+25

oC-

2

-

V

Output Resistance

rO

f = 1KHz

-

15

-

m

Ω

Short Circuit Current

ISC

VI = 35V, TA =+25

oC

-

230

-

mA

Peak Current

IPK

TJ =+25

oC-

2.2

-

A

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