79L08
D
D
D
D
D
D
3-Terminal Regulators
Output Current Up to 100 mA
No External Components Required
Internal Thermal-Overload Protection
Internal Short-Circuit Current Limiting
Provided Pb-Free packages from the end
of 2004
Negative-Voltage Regulators
OUTPUT
INPUT
COMMON
C
I
O
TO–92
79L08ACZ
description
This series of fixed negative-voltage integrated-circuit
SOT-89
voltage regulators is designed for a wide range of
79L08CPK
COMMON
INPUT
OUTPUT
applications. These include on-card regulation for
elimination of noise and distribution problems
associated with single-point regulation. In addition,
they can be used to control series pass elements to make high-current voltage-regulator circuits. One of these
regulators can deliver up to 100 mA of output current. The internal current-limiting and thermal-shutdown features
make them essentially immune to overload. When used as a replacement for a zener-diode and resistor combination,
these devices can provide ef
fective improvement in output iimpedance of two orders of magnitude, with lower bias
current.
electrical characteristics at specified virtual junction temperature, V
I
=
-14V, I
o
= 40mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
‡
MIN
25°C
Output voltage
V
to
7 V t 20 V
I
1 mA t 40 mA
A to
A
Full range
25°C
25°C
25 C
25°C
25°C
25 C
25°C
25°C
25°C
125°C
VI =
-11V to -23V
IO = 1 mA to 40 mA
F ll
Full
Full
range
79L06
TYP
MAX
UNIT
-7.7
-8
-8.3
V
Input
voltage regulation
Ripple rejection
Output
voltage regulation
Output
noise voltage
Dropout voltage
I
o
=1 to 40mA, V = -10.5V to
-23V
-
Io=1mA to 70mA
VI =
-10.5V to -23V
VI =
-11V to -23V
VI =
-11V to -23V
f = 120 Hz
IO = 1 mA to
40mA
IO = 1 mA to
100mA
f = 10 Hz to 100 kHz
-7.6
42
36
-8.4
200
mV
mV
dB
150
37
46
15
30
50
100
mV
mV
µV
V
54
1.7
Bias
c
current
Bias current
rrent
Bias
current change
3
6
5.5
1.5
0.1
mA
mA
mA
mA
‡ Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-µF capacitor across the input and a 0.1-µF capacitor across the output. Full range for the 7
9L08 is T
J = 0°C to
70°C
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: ic@wingshing.com
3-1
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