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KA7818ETU

3-Terminal 1 A Positive Voltage Regulator

Fairchild Semiconductor 

Electrical Characteristics (KA7812AE)

Refer to the test circuit, 0°C < TJ < +125°C, IO = 1 A, VI = 19 V, CI= 0.33 μF, CO = 0.1 μF, unless otherwise specified.

Symbol

Parameter

Conditions

Min. Typ. Max. Unit

VO

Output Voltage

Regline Line Regulation(27)

Regload Load Regulation(27)

IQ

Quiescent Current

ΔIQ

ΔV/ΔT

VN

RR

VDrop

RO

ISC

IPK

Quiescent Current Change

Output Voltage Drift(28)

Output Noise Voltage

Ripple Rejection(28)

Dropout Voltage

Output Resistance(28)

Short-Circuit Current

Peak Current(28)

TJ = +25°C

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = 14.8 V to 27 V

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

VI= 16 V to 22 V

TJ = +25°C

VI= 14.5 V to 27 V

VI= 16 V to 22 V

TJ = +25°C, IO = 5 mA to 1.5 A

IO = 5 mA to 1.0 A

IO = 250 mA to 750 mA

TJ = +25°C

VI = 15 V to 30 V, TJ = +25°C

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

IO = 5 mA to 1.0 A

IO = 5 mA

f = 10 Hz to 100 kHz, TA = +25°C

f = 120 Hz, IO = 500 mA,

VI = 14 V to 24 V

IO = 1 A, TJ = +25°C

f = 1 kHz

VI = 35 V, TA = +25°C

TJ = +25°C

11.75

11.50

12.00

12.00

10

4

10

3

12

12

5

5.1

-1

76

60

2

18

250

2.2

12.25

V

12.50

120

120

mV

120

60

100

100 mV

50

6.0 mA

0.8

0.8 mA

0.5

mV/°C

μV

dB

V

mΩ

mA

A

Notes:

27. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must

be taken into account separately. Pulse testing with low duty is used.

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

© 2006 Fairchild Semiconductor Corporation

KA78XXE / KA78XXAE Rev. 1.9

16

www.fairchildsemi.com

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