IL79XXC
SERIES
T
HREE
-
TERMINAL NEGATIVE VOLTAGE REGULATORS
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.
TO-220 AB
Pin 1. I nput
2. Ground
3. Output
(H eatsink
surface connected
to Pin 2.)
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
STANDARD APPLICATION
input
Cin
0.33 F
IL79XX
output
Co
1.0 F
Device
IL7905
IL7905.2
IL7906
IL7908
type/nominal output voltage
5V
IL7912
12 V
5.2 V
IL7915
15 V
6V
IL7918
18 V
8V
IL7924
24 V
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
Maximum ratings
(T
A
= +25
°C
unless otherwise noted)
Rating
Input Voltage (-5.0V
≥Vo≥-
18V)
(24 V)
Power Dissipation
Plastic Package
TA
= +25
°C
Derate above TA
= +25
°C
Tc =
+25
°C
Derate above Tc=+95°C
Storage Junction Temperature Rang
Operating Junction Temperature Rang
Symbol
V
I
Value
-35
-40
Internally Limited
15.4
Internally Limited
200
-65 to +150
0 to +150
Unit
Vdc
PD
1/R
ΘJA
PD
1/R
ΘJA
Tstg
TJ
Watts
mW/°C
Watts
mW/°C
°C
°C
1
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