LM7908

TIGER ELECTRONIC CO.,LTD Product specification 3-Terminal 1A Positive Voltage Regulator GENERAL DESCRIPTION LM7908 The LM7908 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 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 -8.0 -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 = -14V, Ci= 2.2uF, Co=1.0uF unless otherwise specified) Parameter Output Voltage Line Regulation (Note1) Symbol VO Regline Test Conditions VI = -10.5V to -21V VI = -10.5V to -25V VI = -11V to -17V Load Regulation (Note1) Quiescent Current Quiescent Current Change Ripple Rejection Dropout Voltage Short Circuit Current Peak Current Regload IQ ΔIQ RR VDrop ISC IPK IO = -5.0mA to-1.5A IO =-250mA to -750mA TJ =+25 oC IO = -5mA to -1A VI = -11.5V to -25V f = 120Hz, VO = -11V to -21V IO = -1A, TJ =+25 oC VI = -35V, TA =+25 oC TJ =+25 oC Min -7.76 — — — — — — — 54 — — — Typ -8.0 -10 -5.0 -12 -4 -3 — — 60 -2 -300 -2.2 Max -8.24 -160 mV -80 -160 -80 6 -0.5 mA -1.0 — — — — dB V mA A mA mV Unit V O