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78L18 D D D D D D 3-Terminal Regulators Output Current up to 100 mA No External Components Internal Thermal-Overload Protection Internal Short-Circuit Current Limiting Direct Replacements for Fairchild A78L18 Series Positive-Voltage Regulators O C I TO-92 78L18ACZ description This series of fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power-pass elements to make high-current voltage regulators. One of these regulators can deliver up to 100 mA of output current. The internal limiting and thermal-shutdown features of these regulators make them essentially immune to overload. When used as a replacement for a zener diode-resistor combination, an effective improvement in output impedance can be obtained, together with lower bias current. INPUT COMMON OUTPUT OUTPUT GND INPUT SOT-89 78L18CPK electrical characteristics at specified virtual junction temperature, VI = 26V, I o 40mA (unless otherwise noted) PARAMETER TEST CONDITIONS TJ MIN 25C Output voltage 78L18 TYP 18 UNIT MAX 18.7 18.9 18.9 360 300 dB 180 90 mV mV V V 6.5 6 1.5 0.1 mA mA mA mA V 17.3 17.1 17.1 IO=1mA to 40MA, V I= 20.5 to 33V IO = 1 mA to 70 mA VI = 20.5V to 33V VI = 22V to 33V VI = 21.5V to 31.5V, f = 120 Hz IO = 1 mA to 100 mA IO = 1 mA to 40 mA f = 10 Hz to 100 kHz I 1 mA to 40 mA At A Full range Full range 25C 25 C 25C 25C 25 C 25C 25C 25C 125C 18 18 70 64 Input voltage regulation Ripple rejection Output voltage regulation Output noise voltage Dropout voltage mV mV 32 36 27 19 89 1.7 4.7 Bias current current Bias c rrent Bias current change VI = 22V to 33V IO = 1 mA to 40 mA Full range F ll Full 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-F capacitor across the input and a 0.1-F capacitor across the output. Full range for the 78L05 is T J = 0C to 70C 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 2-1 WS 78L18 absolute maximum ratings over operating temperature range (unless othewise noted) 78L18 Input voltage VI voltage, Virtual junction temperature range, TJ Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds Storage temperature range, Tstg PARAMETER UNIT V C C C 35 150 260 -65 to 150 recommended operating conditions 78L18 voltage, Input voltage VI MIN MAX UNIT 20.5 33 100 V mA Output current, IO Operating virtual j g junction temperature, TJ 0 70 C Pad Location 78L18 90um 3 85um 90um 2 90um 9 9 95um 1 100um Chip size 1.0 x 1.2 mm Pad N 1 2 3 Pad Name Ground Input Output X (um) Y (um) 95 820 535 100 1010 1015 2-2 |
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