79L12

79L12 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 Direct Replacement for Motorola MC79L12 Series Negative-Voltage Regulators OUTPUT INPUT COMMON C I O TO–92 79L12ACZ 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 79L12CPK 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 = -19V, IO =40mA (unless otherwise noted) PARAMETER TEST CONDITIONS TJ‡ MIN V 7 V t 20 V to 20 I 1 mA to 40 mA At A I o=1mA to 40mA,VI =-14.5V to -27V IO = 1 mA to 70 mA VI = -14.5 to -27V VI = -16V to -27V VI = -15V to -25V f = 120 Hz IO = 1 mA to 100 mA IO = 1 mA to 40 mA f = 10 Hz to 100 kHz 25°C Full range Full range 2C 25 C 25°5°C 25°C 25 C 25°C 25°C 25°C 25°C 125°C VI = -16V to -27V IO = 1 mA to 40 mA Full range ll Full range 79L12 TYP MAX UNIT Output voltage -11.5 -11.4 -11.4 -5 -12.5 -12.5 -12.5 V Input voltage regulation Ripple rejection Output voltage regulation Output noise voltage Dropout voltage 50 40 250 200 mV mV dB 37 42 24 15 80 1.7 60 30 mV µV V mV Biasccurrent Bias current rrent Bias current change 6.5 6 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 79L12 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: wsccltd@hkstar.com 3-1 WS 79L12 equivalent schematic COMMON OUTPUT INPUT absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Input voltage: 79L12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35V 150 °C Operating free-air, case, or virtual junction temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 79L12 Input voltage, VI Output current, IO Operating virtual junction temperature, TJ 0 MIN MAX UNIT V mA °C -14.5 -27 100 70 3-2 WS 79L12 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) 1150 115 115 Y(µm) 115 690 950 3-3