IC SMD Type Three-Terminal Positive Voltage Regulator LM78L18 1.70 0.1 Features Maximum Output current IO: 0.1A Output Voltage VO: 18V Continuous Total Dissipation PD: 0.5W (Ta = 25 ) 0.42 0.1 0.46 0.1 1.OUT 2.GND 3.IN Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Parameter Input Voltage Symbol Rating Unit VI 35 V Operating Junction Temperature Range TOPR -55 +125 Storage Temperature Range TSTG -55 +150 Electrical Characteristics (VI=26V, IO=40mA,CI=0.33 F,CO=0.1 F, unless otherwise specified) Parameter Symbol Testconditions TJ = 25 Output Voltage VO TJ = 0 125 , 20.5V VI 33V, IO=1mA TJ = 0 125 , VI = 26V, IO=1mA Load Regulation VO Line Regulation VO Quiescent Current IQ Quiescent current Change 18 18.9 V 17.1 18.9 V 180 mV 90 mV 70 360 mV 64 300 mV 4.7 6.5 mA TJ = 25 , 22V VI VI 33V, IO = 40mA 33V, IO = 40mA TJ = 25 TJ = 0 125 , 22V VI RR TJ = 0 125 , 21.5V VD TJ = 25 LM78L18 1 1.5 33V, IO = 40mA TJ = 0 125 , VI = 26V, 1mA 2 18 19 Dropout Voltage F 17.1 40mA Ripple Rejection 0.33 V 100mA TJ = 25 , 10Hz f CI Unit 18.7 TJ = 25 , VI = 26V, IO=1mA VN 3 Max 18 TJ = 25 , VI = 26V, IO=1mA TJ = 25 , 20.5V IQ VI 70mA Typ 27 Output Noise Voltage Typical Application 40mA Min 17.3 IO 0.1 40mA 100KHz VI 31.5V, f = 120Hz 32 mA 89 V 36 dB 1.7 V VO CO 0.1 F Note:Bypass capacitors are recommended for optimum stability and transient response and should be located as close as possible to the regulators. www.kexin.com.cn 1 IC SMD Type LM78L18 Typical Characteristics VO (V) VO (V) I O =0, T J = 25 24 V IN = 26V, T J = 25 24 20 16 16 12 8 8 4 0 10 20 30 0 V IN (V) Output Characteristics VO (V) 100 200 300 I O (mA) Load Characteristics IO (mA) V IN = 26V , I O = 0mA 30 T J = 25 300 25 20 200 15 10 100 5 0 50 100 150 TA ( 0 ) Thermal Shutdown 400 300 200 100 50 75 100 125 TA ( ) Power Dissipation vs. Ambient Temperature 2 www.kexin.com.cn 20 30 V IN - V O (V) Short Circuit Output Current 500 PD (mW) 25 10