LM7818

TIGER ELECTRONIC CO.,LTD Product specification 3-Terminal 1A Positive Voltage Regulator GENERAL DESCRIPTION LM7818 The LM7818 series of three terminal positive regulators are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. O ABSOLUTE MAXIMUM RATINGS ( Ta = 25 C) Parameter Input Voltage Output Voltage Peak Current Operating Temperature Range Storage Temperature Range Symbol VI VO IPK TOPR TSTG Typ 35 18.0 2.2 0~125 -65~150 Unit V V A o C C o TO-220 ELECTRICAL CHARACTERISTICS ( Ta = 25 C) (Refer to test circuit, Io = 500mA, Vi = 27V, Ci= 0.33uF, Co=0.1uF unless otherwise specified) Parameter Output Voltage Line Regulation (Note1) Symbol VO Regline Test Conditions VI = 21V to 33V VI = 21V to 33V VI = 24V to 30V Load Regulation (Note1) Quiescent Current Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current Regload IQ RR VDrop rO ISC IPK IO = 5.0mA to1.5A IO =250mA to 750mA TJ =+25 oC f = 120Hz, VO = 22V to 32V IO = 1A, TJ =+25 oC f = 1KHz VI = 35V, TA =+25 oC TJ =+25 oC 53 Min 17.46 Typ 18.0 15 5 15 5 5.2 69 2 0.022 250 2.2 Max 18.54 360 mV 180 360 180 8 mA dB V Ω mA A mV Unit V O