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79L05
D
D
D
D
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Negative-Voltage Regulators
3-Terminal Regulators
Output Current Up to 100 mA
No External Components Required
Internal Thermal-Overload Protection
Internal Short-Circuit Current Limiting
Direct Replacement for Motorola MC79L00
Series
C
I
OUTPUT
INPUT
COMMON
O
TO–92
79L05ACZ
description
This series of fixed negative-voltage integrated-circuit
SOT-89
voltage regulators is designed for a wide range of
COMMON INPUT OUTPUT
79L05CPK
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 impedance of two orders of magnitude, with lower bias
current.
electrical characteristics at specified virtual junction temperature, VI =-10 V, I = 40 mA (unless
otherwise noted)
PARAMETER
V 7 V tto 20 V
I
1 mA
A to
t 40 mA
A
Io =1mA to 40mA,Vi=-7V to -20V
IO = 1 mA to 70 mA
Input
voltage regulation
VI = -7V to -20V
VI = -8V to -20V
Ripple rejection
VI = -8V to -18V f = 120 Hz
IO = 1 mA to 100 mA
Output
voltage regulation
Output
noise voltage
IO = 1 mA to 40 mA
f = 10 Hz to 100 kHz
Dropout voltage
Biascurrent
Bias
ccurrent
rrent
Bias
current change
VI = -8V to -20V
IO = 1 mA to 40 mA
UNIT
MIN
TYP
MAX
-4.8
-4.75
-5
Full range
-5.2
-5.25
Full range
-4.75
25°C
Output voltage
79L05
TJ‡
TEST CONDITIONS
25°C
-5.25
15
25°C
25°C
25
C
150
100
41
25°C
25
C
V
49
mV
mV
dB
20
60
10
30
mV
mV
25°C
40
µV
25°C
1.7
V
25°C
6
125°C
5.5
Fullll range
F
Full
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 79L05 is TJ = 0°C to 70°C
3-1
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: [email protected]
WS
79L05
equivalent schematic
COMMON
OUTPUT
INPUT
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Input voltage: 79L05
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30V
Operating free-air, case, or virtual junction temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150 °C
Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
recommended operating conditions
79L05
Input voltage, VI
MIN
MAX
–7
– 20
V
100
mA
70
°C
Output current, IO
Operating virtual junction temperature, TJ
0
3-2
UNIT
WS
79L05
Pad Location WS79L00
3
2
90µm
1
90µm
chip size 1.15 x 1.35mm
Pad Location Coordinates
Pad N
1
2
3
Pad Name
Ground
Input
Output
X(µm)
Y(µm)
1150
115
115
115
690
950
3-3
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www.datasheetcatalog.com
Datasheets for electronics components.