79L05 Negative-Voltage Regulators
D 3-Terminal Regulators
D Output Current Up to 100 mA
OUTPUT
D No External Components Required INPUT
D Internal Thermal-Overload Protection C
COMMON
D Internal Short-Circuit Current Limiting I
O
D Direct Replacement for Motorola MC79L00 TO–92
Series
79L05ACZ
description
This series of fixed negative-voltage integrated-circuit
SOT-89
voltage regulators is designed for a wide range of
applications. These include on-card regulation for 79L05CPK COMMON INPUT OUTPUT
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)
79L05
PARAMETER TEST CONDITIONS TJ‡ UNIT
MIN TYP MAX
25°C -4.8 -5 -5.2
V 7 V tto 20 V I 1 mA
A to
t 40 mA
A
Output voltage Io =1mA to 40mA,Vi=-7V to -20V Full range -4.75 -5.25 V
IO = 1 mA to 70 mA Full range -4.75 -5.25
Input VI = -7V to -20V 15 150
25°C
25°C mV
mV
voltage regulation VI = -8V to -20V
25 C 100
Ripple rejection VI = -8V to -18V f = 120 Hz 25°C 41 49 dB
Output IO = 1 mA to 100 mA 20 60
25°C
25 C mV
voltage regulation IO = 1 mA to 40 mA 10 30 mV
Output
f = 10 Hz to 100 kHz 25°C µV
noise voltage 40
Dropout voltage 25°C 1.7 V
25°C 6
Biascurrent
Bias ccurrent
rrent mA
125°C 5.5 mA
Bias VI = -8V to -20V 1.5
current change Full
Fullll range
F mA
IO = 1 mA to 40 mA 0.1 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
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Wing Shing Computer Components Co., (H.K.)Ltd. Tel:(852)2341 9276 Fax:(852)2797 8153
Homepage: http://www.wingshing.com E-mail: wsccltd@hkstar.com
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 MIN MAX UNIT
Input voltage, VI –7 – 20 V
Output current, IO 100 mA
Operating virtual junction temperature, TJ 0 70 °C
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WS
79L05
Pad Location WS79L00
1
90µm
90µm
chip size 1.15 x 1.35mm
Pad Location Coordinates
Pad N Pad Name X(µm) Y(µm)
1 Ground 1150 115
2 Input 115 690
3 Output 115 950
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This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.
