1

The IL7900 series of fixed output negative

voltage regulators are intended as complements to

the IL7800 series devices. These negative regulators

are available in the same seven-voltage options as

the IL7800 devices. In addition, one extra voltage

option commonly employed in MECL systems is also

available in the current series.

Available in fixed output voltage options from -5.0 to -24 volts, these regulators employ

current limiting, thermal shutdown, and safe-area compensation - making them remarkably

rugged under most operating conditions. With adequate heatsinking they can deliver

output currents in excess of 1.0 ampere.

♦ No External Components Required

♦ Internal Thermal Overload Protection

♦ Internal Short - Circuit Current Limiting

♦ Output

Transistor

Safe

-

Area

Compensation

♦ Available in 4% Voltage Tolerance

Device type/nominal output voltage

IL7905

IL7905.2

IL7906

IL7908

5 V

5.2 V

6 V

8 V

IL7912

IL7915

IL7918

IL7924

12 V

15 V

18 V

24 V

Rating

Symbol

Value

Unit

Input Voltage (-5.0V

≥Vo≥- 18V)

(24 V)

-35

-40

Vdc

Power Dissipation

Plastic Package

TA = +25

°C

Derate above TA = +25

°C

Tc = +25

°C

Derate above Tc=+95

°C

PD

PD

Internally Limited

15.4

Internally Limited

200

Watts

mW/

°C

Watts

mW/

°C

Storage Junction Temperature Rang

Tstg

-65 to +150

°C

Operating Junction Temperature Rang

TJ

0 to +150

°C

Pin 1. I nput

2. Ground

3. Output

(H eatsink

surface connected

to Pin 2.)

TO-220 AB

STANDARD APPLICATION

IL79XX

Co

1.0 F

Cin

0.33 F

input

output

A common ground is required between the input and

the output voltages. The input voltage must remain

typically 2.0V more negative even during the high

point on the input ripple voltage.

XX - these two digits of the type number indicate

voltage

Cin - is required if regulator is located an appreciable

distance from power supply filter

Co - improves stability and transient response