IL79XXC SERIES
THREE-TERMINAL NEGATIVE VOLTAGE REGULATORS
The IL7900 series of fixed output negative
TO-220 AB
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
Pin 1. Input
(Heatsink
surface connected
to Pin 2.)
2. Ground
option commonly employed in MECL systems is also
3. Output
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
STANDARD APPLICATION
input
output
♦ Output Transistor Safe
-
Area
IL79XX
Compensation
Cin
Co
1.0
0.33
F
F
♦ Available in 4% Voltage Tolerance
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
Device type/nominal output voltage
Cin - is required if regulator is located an appreciable
distance from power supply filter
IL7905
IL7905.2
IL7906
IL7908
5 V
IL7912
IL7915
IL7918
IL7924
12 V
15 V
18 V
24 V
5.2 V
6 V
Co - improves stability and transient response
8 V
Maximum ratings (TA = +25 °C unless otherwise noted)
Rating
Input Voltage (-5.0V ≥Vo≥- 18V)
(24 V)
Symbol
Value
-35
Unit
VI
Vdc
-40
Power Dissipation
Plastic Package
PD
1/RΘJA
PD
Internally Limited
15.4
Watts
mW/°C
Watts
TA = +25 °C
Derate above TA = +25 °C
Tc = +25 °C
Internally Limited
200
1/RΘJA
mW/°C
Derate above Tc=+95°C
Storage Junction Temperature Rang
Tstg
TJ
-65 to +150
0 to +150
°C
°C
Operating Junction Temperature Rang
1
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