Fairchild Semiconductor KA79L24AZ, KA79L18AZ, KA79L08AZ, KA79L05AD, KA79L15AZ Datasheet

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KA79LXXA

3-Terminal 0.1A Negative Voltage Regulator

Features

•Output Current up to 100mA

•No External Components

•Internal Thermal Over Load Protection

•Internal Short Circuit Current Limiting

•Output Voltage Offered in ± 5% Tolerance

•Output Voltage of -5V, -8V, -12V, -15V, -18V and -24V

Description

These regulators employ internal current limiting and thermal shutdown, making them essentially indestructible.

TO-92 SOT-89

1

1

1.GND 2.Input 3.Output

8-SOP

1

1. Output 2.3.6.7. Input 5. GND 4.8. NC

Internal Block Diagram

R26

R15

Q10

Q12

Q11

R22

R23+R21

Q5

D3

D2

Q6

Q7

R18

R

Q4

D1

Q15

Q17

Q2

Q3

C1

R1

R6

R17

Q16Q14

Q13

Q9

Q8

Q1

R2

R3

R16

R5

R28

R24

R25

R29

R7

R4

Rev. 1.0.2

©2002 Fairchild Semiconductor Corporation

KA79LXXA

Absolute Maximum Ratings

Parameter	Symbol	Value	Unit
Input Voltage (for Vo= -5V to -8V)		-30
(for Vo = -12V to -18V)	VI	-35	V
(for Vo = -24V)		-40
Operating Temperature Range	TOPR	0 ~ +125	° C
Storage Temperature Range	TSTG	-65 ~ +150	° C

Electrical Characteristics(KA79L05A)

(VI = -10V, IO = 40mA, CI = 0.33

F, CO = 0.1 F, 0° C ≤ TJ ≤

+125° C, unless otherwise specified)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

VO

TJ = +25° C

-4.8

-5.0

-5.2

V

Line Regulation (Note1)

∆ VO

TJ =+25° C

-7.0V ≥

VI ≥

-20V

-

15

150

mV

-8V ≥ VI ≥ -20V

-

-

100

mV

Load Regulation (Note1)

∆ VO

TJ =+25° C

1.0mA ≤

IO ≤

100mA

-

20

60

mV

1.0mA ≤

IO ≤

40mA

-

10

30

mV

Output Voltage

VO

-7.0V ≥ VI ≥

-20V, 1.0mA ≤

IO ≤

40mA

-4.75

-

-5.25

V

VI = -10V, 1.0mA≤ IO ≤

70mA

-4.75

-

-5.25

V

Quiescent Current

IQ

TJ =+25° C

-

2.0

5.5

mA

TJ = +125° C

-

-

6.0

Quiescent Current

With Line

∆ IQ

-8V ≥ VI ≥ -20V

-

-

1.5

mA

Change

With Load

∆ IQ

1.0mA ≤ IO ≤

40mA

-

-

0.1

mA

Output Noise Voltage

VN

TA = +25° C,10Hz ≤ f ≤

100kHz

-

30

-

V

Ripple Rejection

RR

f = 120Hz, -8V ≥ VI ≥ -18V , TJ = +25° C

41

60

-

dB

Dropout Voltage

VD

TJ = +25° C

-

1.7

-

V

Note

1.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.

2

KA79LXXA

Electrical Characteristics (KA79L08A) (Continued)

(VI = -14V, IO = 40mA, CI = 0.33

F, CO = 0.1 F, 0° C ≤ TJ ≤

+125° C, unless otherwise specified)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

VO

TJ = +25° C

-7.7

-8.0

-8.3

V

Line Regulation (Note1)

∆ VO

TJ =+25°

C

-10.3V ≥

VI ≥

-23V

-

-

175

mV

-12V ≥ VI ≥ -23V

-

-

125

mV

Load Regulation (Note1)

∆ VO

TJ =+25°

C

1.0mA ≤

Io ≤

100mA

-

-

80

mV

1.0mA ≤

Io ≤

40mA

-

-

40

mV

Output Voltage

VO

-10.3V ≥

VI ≥

-23V, 1.0mA ≤

Io ≤

40mA

-7.6

-

-8.4

V

VI = -14V, 1.0mA ≤ Io ≤ 70mA

-7.6

-

-8.4

Quiescent Current

IQ

Tj =+25° C

-

-

6.0

mA

Tj = +125° C

-

-

5.5

Quiescent Current

With Line

∆ IQ

-11.7V ≥

VI ≥

-23V

-

-

1.5

mA

Change

With Load

1.0mA ≤

Io ≤

40mA

-

-

0.1

mA

Output Noise Voltage

VN

Tj = +25° C,10Hz ≤

f ≤

100kHz

-

50

-

V

Ripple Rejection

RR

f = 120Hz, -11V ≥

VI ≥

-21V , Tj = +25° C

39

55

-

dB

Dropout Voltage

VD

Tj = +25° C

-

1.7

-

V

Note

1.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.

3

KA79LXXA

Electrical Characteristics(KA79L12A) (Continued)

(VI = -19V, IO = 40mA, CI = 0.33

F, CO = 0.1 F, 0° C ≤ TJ ≤

+125° C, unless otherwise specified)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage

VO

TJ = +25° C

-11.5

-12.0

-12.5

V

Line Regulation (Note1)

∆ VO

TJ = +25° C

-14.5V ≥

VI ≥

-27V

-

-

250

mV

-16V ≥ VI ≥ -27V

-

-

200

mV

Load Regulation (Note1)

∆ VO

TJ = +25° C

1.0mA ≤

IO ≤

100mA

-

-

100

mV

1.0mA ≤

IO ≤

40mA

-

-

50

mV

Output Voltage

VO

-14.5V > VI >

-27V, 1.0mA ≤

IO ≤

40mA

-11.4

-

-12.6

V

VI = -19V, 1.0mA ≤

IO ≤ 70mA

-11.4

-

-12.6

V

Quiescent Current

IQ

TJ = +25° C

-

-

6.0

mA

TJ = +125° C

-

-

6.5

Quiescent Current

With Line

∆ IQ

-16V ≥ VI ≥ -27V

-

-

1.5

mA

Change

With Load

∆ IQ

1.0mA ≤ IO ≤

40mA

-

-

0.1

mA

Output Noise Voltage

VN

TA = +25° C,10Hz ≤

f ≤

100kHz

-

80

-

V

Ripple Rejection

RR

f = 120Hz, -15V ≥ VI ≥

-25V

37

42

-

dB

TJ = +25° C

Dropout Voltage

VD

TJ = +25° C

-

1.7

-

V

Note

1.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.

4