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

www.fairchildsemi.com

KA79LXXA

3-Terminal 0.1A Negative V oltage R egulator

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

Internal Block Diagram

Description

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

TO-92

1

1.GND 2.Input 3.Output

8-SOP

1

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

SOT-89

1

D3

D2

Q14

Q16

R28

R24

©2002 Fairchild Semiconductor Corporation

R23+R21

Q15

Q13

R22

R18

R25

Q10

Q11

Q5

R29

Q17

R7

Q6

Q9

C1

R16

Q12

R26

R17

Q8

Q7

Q1

Q4

R1
R2

R6

R3

D1

R4

Q2

R15

R

Q3

R5

Rev. 1.0.2

KA79LXXA

Absolute Maximum Ratings

Parameter Symbol Value Unit

Input Voltage (for V
(for V
(for V

= -12V to -18V)

o

= -24V)

o

= -5V to -8V)

o

Operating Temperature Range T
Storage Temperature Range T

V

I

OPR
STG

-30

-35

V

-40

0 ~ +125 °C

-65 ~ +150 °C

Electrical Characteristi c s(K A 79L05A)

(VI = -10V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V

TJ = +25°C -4.8 -5.0 -5.2 V

O

TJ =+25°C

O

TJ =+25°C

O

-7.0V≥ V

O

= -10V, 1.0mA≤ I

V

I

TJ =+25°C-2.05.5

Q

Q
Q

N

= +125°C--6.0

T

J

-8V ≥ V

1.0mA ≤ I

TA = +25°C,10Hz ≤ f ≤ 100kHz - 30 - µV
Ripple Rejection RR f = 120Hz, -8V ≥ V
Dropout Voltage V

TJ = +25°C-1.7-V

D

≤ +125°C, unless otherwise specified)

J

-7.0V ≥ V

-8V ≥ V

1.0mA ≤ I

1.0mA ≤ I

≥ -20V, 1.0mA ≤ IO ≤ 40mA -4.75 - -5.25 V

I

O

≥ -20V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -18V , T

I

≥ -20V - 15 150 mV

I

≥ -20V - - 100 mV

I

≤ 100mA - 20 60 mV

O

≤ 40mA - 10 30 mV

O

≤ 70mA -4.75 - -5.25 V

= +25°C41 60 - dB

J

mA

Note

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

2

due to heating effects must be taken

O

KA79LXXA

Electrical Characteri sti cs (KA79L08A)

(VI = -14V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line
With Load 1.0mA ≤ I

∆I

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, -11V ≥ V
Dropout Voltage V

Note

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

TJ = +25°C -7.7 -8.0 -8.3 V

O

O

O

O

TJ =+25°C

TJ =+25°C

-10.3V ≥ V
= -14V, 1.0mA ≤ I

V

I

≥ -23V, 1.0mA ≤ Io ≤ 40mA -7.6 - -8.4

I

-10.3V ≥ V

-12V ≥ V

1.0mA ≤ I

1.0mA ≤ I

≤ 70mA -7.6 - -8.4

o

≥ -23V - - 175 mV

I

≥ -23V - - 125 mV

I

≤ 100mA - - 80 mV

o

≤ 40mA - - 40 mV

o

Tj =+25°C--6.0

Q

Q

N

D

= +125°C--5.5

T

j

-11.7V ≥ V

≥ -23V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

o

Tj = +25°C,10Hz ≤ f ≤ 100kHz - 50 - µV

≥ -21V , T

I

= +25°C39 55 - dB

j

Tj = +25°C-1.7-V

due to heating effects must be taken

O

V

mA

3

KA79LXXA

Electrical Characteristi c s(K A 79L12A)

(VI = -19V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Note

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

TJ = +25°C -11.5 -12.0 -12.5 V

O

O

O

O

TJ = +25°C

TJ = +25°C

-14.5V >V
= -19V, 1.0mA ≤ I

V

I

> -27V, 1.0mA ≤ IO ≤ 40mA -11.4 - -12.6 V

I

-14.5V ≥ V

-16V ≥ V

1.0mA ≤ I

1.0mA ≤ I

≤ 70mA -11.4 - -12.6 V

O

≥ -27V - - 250 mV

I

≥ -27V - - 200 mV

I

≤ 100mA - - 100 mV

O

≤ 40mA - - 50 mV

O

TJ = +25°C--6.0

Q

Q
Q

N

D

= +125°C--6.5

T

J

-16V ≥ V

1.0mA ≤ I

≥ -27V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

TA = +25°C,10Hz ≤ f ≤ 100kHz - 80 - µV
f = 120Hz, -15V ≥ V

= +25°C

T

J

≥ -25V

I

37 42 - dB

TJ = +25°C-1.7-V

due to heating effects must be taken

O

mA

4

KA79LXXA

Electrical Characteristi c s(K A 79L15A)

(VI = -23V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Q

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Note

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

TJ = +25°C -14.4 -15.0 -15.6 V

O

O

O

O

TJ = +25°C

TJ = +25°C

-17.5V ≥ V
= -23V, 1.0mA ≤ I

V

I

≥ -30V, 1.0mA ≤ IO ≤ 40mA -14.25 - -15.75 V

I

-17.5V ≥ V

-20V ≥ V

1.0mA ≤ I

1.0mA ≤ I

O

≥ -30V - - 300 mV

I

≥ -30V - - 250 mV

I

≤ 100mA - - 150 mV

O

≤ 40mA - - 75 mV

O

≤ 70mA -14.25 - -15.75 V

TJ = +25°C--6.0

= +125°C--6.5

T

J

-20V ≥ V

Q

1.0mA ≤ I

Q

TA = +25°C,10Hz ≤ f ≤ 100kHz - 90 - µV

N

f = 120Hz, -18.5V ≥ V

= +25°C

T

J

TJ = +25°C-1.7-V

D

≥ -30V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

≥ -28.5V

I

due to heating effects must be taken

O

34 39 - dB

mA

5

KA79LXXA

Electrical Characteristi c s(K A 79L18A)

(VI = -27V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Note

1. Load and line regulation are specified at constant junction temperature. Change in V
into account separately. Pulse testing with low duty is used.

TJ = +25°C -17.3 -18.0 -18.7 V

O

O

O

O

TJ = +25°C

TJ = +25°C

-20.7V > V
= -27V, 1.0mA ≤ I

V

I

> -33V, 1.0mA ≤ IO ≤ 40mA -17.1 - -18.9 V

I

-20.7V ≥ V

-21V ≥ V

1.0mA ≤ I

1.0mA ≤ I

O

≥ -33V - - 325 mV

I

≥ -33V - - 275 mV

I

≤ 100mA - - 170 mV

O

≤ 40mA - - 85 mV

O

≤ 70mA -17.1 - -18.9 V

TJ = +25°C--6.5

Q

Q
Q

N

D

= +125°C--6.0

T

J

-21V ≥ V

1.0mA ≤ I

≥ -33V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

TA =+25°C,10Hz ≤ f ≤ 100kHz - 150 - µV
f = 120Hz, -23V ≥ V

= +25°C

T

J

≥ -33V

I

33 48 - dB

TJ = +25°C-1.7-V

due to heating effects must be taken

O

mA

6

KA79LXXA

Electrical Characteristi c s(K A 79L24A)

(VI = -33V, IO = 40mA, CI = 0.33µF, CO = 0.1µF, 0°C ≤T

(Continued)

≤ +125°C, unless otherwise specified)

J

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V
Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V

Output Voltage V

Quiescent Current I

Quiescent Current
Change

With Line ∆I
With Load ∆I

Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V

Note

1. Load an d lin e re gul ation ar e sp ecifi ed at con sta nt ju nct ion t empe rat ure . Chan ge i n V
into account separately. Pulse testing with low duty is used.

TJ = +25°C -23 -24 -25 V

O

O

O

O

TJ = +25°C

TJ = +25°C

-27V ≥ V
= -33V, 1.0mA ≤ I

V

I

≥ -38V, 1.0mA ≤ IO ≤ 40mA -22.8 - -25.2 V

I

-27V ≥ V

-28V ≥ V

1.0mA ≤ I

1.0mA ≤ I

≥ -38V - - 350 mV

I

≥ -38V - - 300 mV

I

≤100mA - - 200 mV

O

≤ 40mA - - 100 mV

O

≤ 70mA -22.8 - -25.2 V

O

TJ = +25°C--6.5

Q

Q
Q

N

D

= +125°C--6.0

T

J

-28V ≥ V

1.0mA ≤ I

≥ -38V - - 1.5 mA

I

≤ 40mA - - 0.1 mA

O

TA = +25°C,10Hz ≤ f ≤100kHz - 200 - µV
f = 120Hz, -29V ≥ V

= +25°C

T

J

≥ -35V

I

31 47 - dB

TJ = +25°C-1.7-V

due to heating effects must be taken

O

mA

7

KA79LXXA

Typical Application

Design Considerations

The KA79LXXA Series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit
when subjected to an excessive power overload condition. Internal Short Circuit Protection that limits the maximum current
the circuit will pass. In many low current applications, compensation capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire
lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high frequency
characteristics to insure stable operation under all load conditions. A 0.33µF or larger tantalum, mylar, or other capacitor
having low interna l impeda nce at h igh fre quencie s should b e chosen . The bypa ss capa citor sh ould be m ounted wi th the sh ortest
possible leads directly across the regulator's input terminals. Normally good construction techniques should be used to
minimize ground loops and lead resistance drops since the regulator has no external sense lead. Bypassing the output is also
recommended.

I

Figure 1. Po sitive And Nega tive Regulator

A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0V above
the output voltage even during the low point on the input ripple voltage.

Figure 2. Typical Appli cation

* C1 is required if regulator is located an appreciable distance from power supply filter.
* C

improves stability and transient response.

O

8

Mechanical Dimensions

Package

+0.25

4.58

–0.15

TO-92

±0.20

4.58

KA79LXXA

Dimensions in millimeters

0.46

1.27TYP

[1.27

±0.20

3.86MAX

±0.10

1.02

±0.10

+0.10

–0.05

0.38

±0.40

14.47

1.27TYP

]

3.60

±0.20

[1.27

±0.20

]

0.38

+0.10
–0.05

(0.25)

(R2.29)

9

KA79LXXA

Mechanical Dimensions

Package

#1

#4

6.00 ±0.30

0.006

0.15

0.236 ±0.012

(Continued)

8-SOP

1.55 ±0.20

0.061 ±0.008

#8

#5

MAX

5.13

0.202

1.80

0.071

Dimensions in millimeters

0.1~0.25

MIN

0.004~0.001

0.56

4.92 ±0.20

0.194 ±0.008

MAX

1.27

0.022

()

0.41 ±0.10

0.016 ±0.004

0.050

+

-0.002

-0.05

0.004

0.50 ±0.20

0.020 ±0.008

+

0.10

3.95 ±0.20

0.156 ±0.008

5.72

0.225

0~8°

MAX0.10

MAX0.004

10

KA79LXXA

Mechanical Dimensions

Package

4.50

±0.20

1.65

±0.10

(Continued)

SOT-89

C0.2

(0.50)

±0.20

2.50

(1.10)

±0.20

4.10

Dimensions in millimeters

1.50

±0.20

(0.40)

0.50

±0.10

1.50 TYP 1.50 TYP

0.40

±0.10

0.40

+0.10
–0.05

11

KA79LXXA

Ordering Information

Product Number Package Operating Temperature

KA79L05AZ
KA79L08AZ
KA79L12AZ
KA79L15AZ
KA79L18AZ
KA79L24AZ
KA79L05AD 8-SOP

KA79L05AM SOT-89

TO-92

0 ~ +125°C

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein :

1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.

www.fairchildsemi.com

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

12/11/02 0.0m 001

 2002 Fairchild Semiconductor Corporation

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