Positive-Voltage Regulators 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 µA78L18 Series O C I TO-92 78L18ACZ INPUT COMMON OUTPUT 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. OUTPUT GND INPUT SOT-89 78L18CPK electrical characteristics at specified virtual junction temperature, VI = 26V, I o 40mA (unless otherwise noted) PARAMETER 25°C Output voltage Input voltage regulation I 78L18 TJ‡ TEST CONDITIONS 1 mA A to t 40 mA A IO=1mA to 40MA, V I= 20.5 to 33V Full range IO = 1 mA to 70 mA VI = 20.5V to 33V Full range UNIT MIN TYP MAX 17.3 18 18.7 17.1 18 18.9 18 18.9 70 64 360 17.1 25°C 25 C V mV mV Ripple rejection VI = 22V to 33V VI = 21.5V to 31.5V, f = 120 Hz Output voltage regulation IO = 1 mA to 100 mA IO = 1 mA to 40 mA 25°C 25 C Output noise voltage f = 10 Hz to 100 kHz 25°C 89 µV Dropout voltage 25°C 1.7 V Bias Bias current ccurrent rrent 25°C 4.7 Bias current change 25°C 32 125°C VI = 22V to 33V IO = 1 mA to 40 mA Full Fullll range F 300 dB 36 27 180 19 90 6.5 6 1.5 0.1 mV mV 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 78L05 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: [email protected] 2-1 WS 78L18 absolute maximum ratings over operating temperature range (unless othewise noted) 78L18 PARAMETER UNIT voltage, VI Input voltage 35 V Virtual junction temperature range, TJ 150 °C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 °C –65 to 150 °C Storage temperature range, Tstg recommended operating conditions 78L18 voltage VI Input voltage, MIN MAX UNIT 20.5 33 V 100 mA 70 °C Output current, IO 0 Operating g virtual jjunction temperature, TJ Pad Location 78L18 90um 3 90um 85um 2 90um 99 95um 1 100um Chip size 1.0 x 1.2 mm Pad N 1 2 3 Pad Name Ground Input Output 2-2 X (um) Y (um) 95 820 535 100 1010 1015