79L18
79L18 is Negative-Voltage Regulators manufactured by Wing Shing Computer Components.
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 79L18CPK MON 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 m A 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 bination, 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 = -26V, IO =40m A otherwise noted)
PARAMETER TEST CONDITIONS TJ‡ MIN to 20 V V 7Vt I 1 m A A to t 40 m A A I o=1m A to 40m A,VI =-20.5 to -33V IO = 1 m A to 70 m A VI = -20.5 to -33V VI = -21V to -33V VI = -23V to -33V f = 120 Hz IO = 1 m A to 100 m A IO = 1 m A to 40 m A f = 10 Hz to 100 k Hz 25°C Full range Full range 25 °C 25 °C C 25 25°C C 25°C 25 25°C 25°C 25°C 125°C VI = -21V to -33V IO = 1 m A to 40 m A Full F ll range Full
TYP MAX
UNIT
Output voltage
-17.3 -17.1 -17.1
-18
-18.7 -18.9 -18.9
Input voltage regulation Ripple rejection Output voltage regulation Output noise voltage Dropout voltage
60 m V m V d B m V
85 m V
µV V
Biascurrent Bias ccurrent rrent
Bias current change
1.5 0.1 m A m A m A m A
‡ 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 79L18 is T J = 0°C to 70°C
Wing Shing puter ponents Co., (H.K.)Ltd. Homepage: http://.wingshing.
Tel:(852)2341 9276 Fax:(852)2797 8153...
