© 2002 Fairchild Semiconductor Corporation

www.fairchildsemi.com

KA79XX / KA79XXA / LM79XX Rev. 1.1.1

12

Electrical Characteristics (KA7912A)

(VI = -19 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF; unless otherwise specified.)

Note:

12. 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.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VO

Output Voltage

TJ = +25°C

-11.75

-12.00

-12.25

V

IO = 5 mA to 1 A, PO ≤ 15 W,

VI = -15.5 V to -27 V

-11.50

-12.00

-12.50

ΔVO

Line Regulation(12)

TJ = +25°C

VI = -14.5 V to -27 V,

Io = 1 A

12

120

mV

VI= -16 V to -22 V,

Io = 1 A

660

VI = -14.8 V to -30 V

12

120

VI = -16 V to -22 V, Io = 1 A

12

120

ΔVO

Load Regulation(12)

TJ = +25°C, IO = 5 mA to 1.5 A

12

150

mV

TJ = +25°C, IO = 250 mA to 750 mA

4

75

IQ

Quiescent Current

TJ = +25°C3

6

mA

ΔIQ

Quiescent Current

Change

IO = 5 mA to 1 A

0.05

0.50

mA

VI = -15 V to -30 V

0.10

1.00

ΔVo/ΔT

Temperature Coefficient

of VD

IO = 5 mA

-0.8

mV/

°C

VN

Output Noise Voltage

f = 10 Hz to 100 kHz, TA = +25°C200

μV

RR

Ripple Rejection

f = 120 Hz,

ΔVI = 10 V

54

60

dB

VD

Dropout Voltage

TJ = +25°C, IO = 1 A

2

V

ISC

Short-Circuit Current

TJ = +25°C, VI = -35 V

300

mA

IPK

Peak Current

TJ = +25°C2.2

A