Fairchild Semiconductor KA7924, KA7918, KA7915, KA7908, KA7906 Datasheet

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KA79XX/KA79XXA

3-Terminal 1A Negative Voltage Regulatorrrr

Features

• Output Current in Excess of 1A

• Output Voltages of -5, -6, -8, -9, -10, -12, -15, -18 , -24V

• Internal Thermal Overload Protection

• Short Circuit Protection

• Output Transistor Safe Operating Area Compensation

Internal Block Digram

Description

The KA79XX/KA79XXA series of three-terminal negative
regulators are available in TO-220 package and with
several fixe d out put vo ltages, maki ng them usefu l in a wide
range of applications. Each type employs internal current
limiting, thermal shutdown and safe operating area
protection, making it essentially indestructible.

TO-220

1

1. GND 2. Input 3. Output

Vin

GND

VOLTAGE

REFERENCE

I1 I2

©2002 Fairchild Semiconductor Corporation

R1

R2

Out

Q2

Rsc

Output

In

Input

+

Q1

-

PROTECTION

CIRCUITRY

Rev. 1.0.1

KA79XX/KA79XXA

Absolute Maximum Ratings

Parameter Symbol Value Unit

Input Voltage V
Thermal Resistance Junction-Case (Note1) R
Thermal Resistance Junction-Air (Note1, 2) R
Operating Temperature Range T
Storage Temperature Range T

Note:

1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm(1S0P)
JEDEC standard: JESD51 -3, JESD51-7

2. Assume no ambient airflow

I

θJC
θJA

OPR
STG

-35 V
5 °C/W

65 °C/W

0 ~ +125 °C

- 65 ~ +150 °C

Electrical Characteristics (KA7905)

(V

= -10V, IO = 500mA, 0°C ≤ T

I

Parameter Symbol Conditions Min. Typ. Max. Unit

Output Voltage V

Line Regulation (Note3) ∆V

Load Regulation (Note3) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Temperature Coefficient of V

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, ∆V
Dropout Voltage V
Short Circuit Current I
Peak Current I

≤ +125°C, C

J

O

O

O

Q

Q

∆Vo/∆TI

D

N

D
SC
PK

=2.2µF, CO =1µF, unless otherwise specified.)

I

TJ = +25°C -4.8 -5.0 -5.2

= 5mA to 1A, P

I

O

V

= -7V to -20V

I

TJ = +25°C

15W

O ≤

V

= -7V to -25V - 35 100

I

= -8V to -12V - 8 50

V

I

-4.75 -5.0 -5.25

TJ = +25°C, IO = 5mA to 1.5A - 10 100

=+25°C, IO = 250mA to 750mA - 3 50

T

J

TJ =+25°C-36mA
IO = 5mA to 1A - 0.05 0.5

= -8V to -25V - 0.1 0.8

V

I

= 5mA - -0.4 - mV/°C

O

f = 10Hz to 100kHz, TA = +25°C-40-µV

= 10V 54 60 - dB

I

TJ =+25°C, IO = 1A - 2 - V
TJ =+25°C, VI = -35V - 300 - mA
TJ =+25°C-2.2-A

V

mV

mV

mA

Note

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

2

due to heating e ffe cts mus t be t ak en

O

KA79XX/KA79XXA

Electrical Characteristics (KA7906)

(V

= -11V, IO = 500mA, 0°C ≤ T

I

≤ +125°C, C

J

I

(Continued)

=2.2µF, CO = 1µF, unless otherwise specified.)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ =+25°C -5.75 -6 -6.25

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Temperature Coefficient of V

D

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, ∆V
Dropout Voltage V
Short Circuit Current I
Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C, IO = 5mA to 1.5A - 10 120

O

T

J

Q

TJ = +25°C-36mA
IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

D
SC
PK

O

f = 10Hz to 100kHz, TA =+25°C - 130 - µV

TJ = +25°C, IO = 1A - 2 - V
TJ = +25°C, VI = -35V - 300 - mA
TJ = +25°C-2.2-A

= 5mA to 1A, P
= -9V to -21V

≤ 15W

O

V

= -8V to -25V - 10 120

I

= -9V to -13V - 5 60

V

I

-5.7 -6 -6.3

= +25°C, IO = 250mA to 750mA - 3 60

= -8V to -25V - 0.1 1.3
= 5mA - -0.5 - mV/°C

= 10V 54 60 - dB

I

V

mV

mV

mA

Note

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

due to heating eff e cts mus t be t aken

O

3

KA79XX/KA79XXA

Electrical Characteristics (KA7908)

(V

= -14V, IO = 500mA, 0°C ≤ T

I

≤ +125°C, C

J

(Continued)

=2.2µF, CO =1µF, unless otherwise specified.)

I

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ =+25°C -7.7-8-8.3

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Temperature Coefficient of V

D

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, ∆V
Dropout Voltage V
Short Circuit Current I
Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C, IO = 5mA to 1.5A - 12 160

O

T

J

Q

TJ = +25°C-36mA
IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

D
SC
PK

O

f = 10Hz to 100kHz, TA = +25°C - 175 - µV

TJ =+25°C, IO = 1A - 2 - V
TJ =+25°C, VI = -35V - 300 - mA
TJ = +25°C-2.2-A

= 5mA to 1A, P

= -10V to -23V

≤ 15W

O

V

= -10.5V to -25V - 10 160

I

= -11V to -17V - 5 80

V

I

-7.6 -8 -8.4

= +25°C, IO = 250mA to 750mA - 4 80

= -10.5V to -25V - 0.1 1

= 5mA - -0.6 - mV/°C

= 10V 54 60 - dB

I

V

mV

mV

mA

Note

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

due to heating e ffe cts mus t be t ak en

O

4

KA79XX/KA79XXA

Electrical Characteristics (KA7909)

(V

= -15V, IO = 500mA, 0°C ≤ T

I

≤ +125°C, C

J

(Continued)

=2.2µF, CO =1µF, unless otherwise specified.)

I

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C -8.7 -9.0 -9.3

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Temperature Coefficient of V

D

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, ∆V
Dropout Voltage V
Short Circuit Current I
Peak Current I

O

I

O

V

I

TJ =+25°C

O

TJ =+25°C, IO = 5mA to 1.5A - 12 180

O

T

J

TJ = +25°C-36mA

Q

IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

D
SC
PK

O

f = 10Hz to 100kHz, TA = +25°C - 175 - µV

TJ = +25°C, IO = 1A - 2 - V
TJ = +25°C, VI = -35V - 300 - mA
TJ = +25°C-2.2-A

= 5mA to 1A, P

= -1.5V to -23V

≤ 15W

O

V

= -11.5V to -26V - 10 180

I

= -12V to -18V - 5 90

V

I

-8.6 -9.0 -9.4

=+25°C, IO = 250mA to 750mA - 4 90

= -11.5V to -26V - 0.1 1

= 5mA - -0.6 - mV/°C

= 10V 54 60 - dB

I

V

mV

mV

mA

Note

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

due to heating eff e cts mus t be t aken

O

5

KA79XX/KA79XXA

Electrical Characteri stics (KA7910)

(V

= -17V, IO = 500mA, 0°C ≤T

I

≤ +125°C, C

J

I

(Continued)

=2.2µF, CO =1µF, unless otherwise specified.)

Parameter Symbol Conditions Min. Typ. Max. Unit

TJ = +25°C -9.6 -10 -10.4

Output Voltage V

Line Regulation (Note1) ∆V

Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Temperature Coefficient of V

O

Output Noise Voltage V
Ripple Rejection RR f = 120Hz, ∆V
Dropout Voltage V
Short Circuit Current I
Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C, IO = 5mA to 1.5A - 12 200

O

T

J

Q

TJ = +25°C-36mA
IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

D
SC
PK

O

10Hz ≤ f ≤ 100kHz, TA = +25°C - 280 - µV

TJ = +25°C, IO = 1A - 2 - V
TJ = +25°C, VI = -35V - 300 - mA
TJ = +25°C-2.2-A

= 5mA to 1A, P
= -12V to -28

≤ 15W

O

V

= -12.5V to -28V - 12 200

I

= -14V to -20V - 6 100

V

I

-9.5 -10 -10.5

= +25°C, IO = 250mA to 750mA - 4 100

= -12.5 to -28V - 0.1 1
= 5mA - -1 - mV/°C

= 10V 54 60 - dB

I

V

mV

mV

mA

Note

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

due to heating e ffe cts mus t be t ak en

O

6