Fairchild Semiconductor MC7924, MC7912, MC7912A, MC7910, MC7918 Datasheet

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MC79XX/MC79XXA/LM79XX

3-Terminal 1A Negative Voltage Regulator

Features

• Output Current in Excess of 1A

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

• Internal Thermal Overload Protection

• Short Circuit Protection

• Output Transistor Safe Operating Area Compensation

Internal Block Digram

Description

The MC79XX / MC79XXA/ LM79XX series of three terminal negative regulators are available in TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible.

TO-220

1

1. GND 2. Input 3. Output

Vin

GND

VOLTAGE

REFERENCE

I1 I2

R1

R2

Output

Q2

Rsc

Out

In

Input

+

Q1

-

PROTECTION

CIRCUITRY

Rev. 1.0.1

MC79XX/MC79XXA/LM79XX

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

65

°C/W

0 ~ +125 °C

-65 ~ +150 °C

Electrical Characteristics (MC7905/LM7905)

(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

Dropout Voltage V Short Circuit Current I

Peak Current I

≤ +125°C, C

J

∆Vo/∆TI

D

Q

SC PK

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

I

TJ = +25°C -4.8 -5.0 -5.2

O

= 5mA to 1A, P

I

O

V

= -7V to -20V

I

TJ = +25°C TJ = +25°C

I

= 5mA to 1.5A

O

=+25°C

T

J

I

= 250mA to 750mA

O

15W

O ≤

V

= -7V to -25V - 35 100

I

= -8V to -12V - 8 50

V

I

-4.75 -5.0 -5.25

- 10 100

-350

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

Q

N

D

= -8V to -25V - 0.1 0.8

V

I

= 5mA - - 0.4 - mV/°C

O

f = 10Hz to 100kHz T

=+25°C

A

f = 120Hz

= 10V

∆V

I

TJ = +25°C I

= 1A

O

-40- µV

54 60 - dB

-2- V

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

V

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

MC79XX/MC79XXA/LM79XX

Electrical Characteristics (MC7906)

(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

Dropout Voltage V Short Circuit Current I

Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C I

O

T

J

I

O

TJ =+25°C-36mA

Q

IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

O

f = 10Hz to 100kHz T

A

f = 120Hz ∆V

TJ = +25°C

D

I

O SC PK

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

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

= 5mA to 1.5A

=+25°C

= 250mA to 750mA

≤ 15W

O

V

= -8V to -25V - 10 120

I

= -9V to -13V - 5 60

V

I

-5.7 -6 -6.3

- 10 120

-360

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

=+25°C

= 10V

I

= 1A

- 130 - µV

54 60 - dB

-2- V

V

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

MC79XX/MC79XXA/LM79XX

Electrical Characteristics (MC7908)

(V

= -14V, 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 -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

Dropout Voltage V Short Circuit Current I

Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C I

O

T

J

I

O

TJ =+25°C-36mA

Q

IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

O

f = 10Hz to 100kHz

N

T

A

f = 120Hz ∆V

TJ = +25°C

D

I

O

SC

PK

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

= 5mA to 1A, P = -10V to -23V

= 5mA to 1.5A

=+25°C

= 250mA to 750mA

≤ 15W

O

V

= -10.5V to -25V - 10 160

I

= -11V to -17V - 5 80

V

I

-7.6 -8 -8.4

- 12 160

-480

= -10.5V to -25V - 0.1 1 = 5mA - -0.6 - mV/°C

=+25°C

= 10V

I

= 1A

- 175 - µV

54 60 - dB

-2- V

V

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

MC79XX/MC79XXA/LM79XX

Electrical Characteristics (MC7909)

(V

= -15V, 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 -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

Dropout Voltage V Short Circuit Current I

Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C I

O

T

J

I

O

TJ = +25°C-36mA

Q

IO = 5mA to 1A - 0.05 0.5

Q

V

I

∆Vo/∆TI

N

O

f = 10Hz to 100kHz T

A

f = 120Hz ∆V

TJ = +25°C

D

I

O SC PK

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

= 5mA to 1A, P

= -1.5V to -23V

= 5mA to 1.5A

= +25°C

= 250mA to 750mA

≤ 15W

O

V

= -11.5V to -26V - 10 180

I

= -12V to -18V - 5 90

V

I

-8.6 -9.0 -9.4

- 12 180

-490

= -11.5V to -26V - 0.1 1

= 5mA - -0.6 - mV/°C

= +25°C

= 10V

I

= 1A

- 175 - µV

54 60 - dB

-2-V

V

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

MC79XX/MC79XXA/LM79XX

Electrical Characteristics (MC7910)

(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

Dropout Voltage V Short Circuit Current I

Peak Current I

O

I

O

V

I

TJ = +25°C

O

TJ = +25°C I

O

T

J

I

O

Q

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

Q

V

I

∆Vo/∆TI

N

O

10Hz ≤ f ≤ 100kHz T

A

f = 120Hz ∆V

TJ = +25°C

D

I

O SC PK

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

= 5mA to 1A, P

= -12V to -28

= 5mA to 1.5A

= +25°C

= 250mA to 750mA

≤ 15W

d

V

= -12.5V to -28V - 12 200

I

= -14V to -20V - 6 100

V

I

-9.5 -10 -10.5

- 12 200

- 4 100

= -12.5V to -28V - 0.1 1

= 5mA - -1 - mV/°C

=+25°C

= 10V

I

= 1A

- 280 - µV

54 60 - dB

-2-V

V

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

6