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LM2984C Datenblatt(PDF) 1 Page - National Semiconductor (TI) |
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LM2984C Datenblatt(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page TLH8821 May 1989 LM2984C Microprocessor Power Supply System General Description The LM2984C positive voltage regulator features three in- dependent and tracking outputs capable of delivering the power for logic circuits peripheral sensors and standby memory in a typical microprocessor system The LM2984C includes circuitry which monitors both its own high-current output and also an external mP If any error conditions are sensed in either a reset error flag is set and maintained until the malfunction terminates Since these functions are in- cluded in the same package with the three regulators a great saving in board space can be realized in the typical microprocessor system The LM2984C also features very low dropout voltages on each of its three regulator outputs (06V at the rated output current) Furthermore the quies- cent current can be reduced to 1 mA in the standby mode Designed also for vehicular applications the LM2984C and all regulated circuitry are protected from reverse battery in- stallations or 2-battery jumps Familiar regulator features such as short circuit and thermal overload protection are also provided Fixed outputs of 5V are available in the plas- tic TO-220 power package Features Y Three low dropout tracking regulators Y Output current in excess of 500 mA Y Low quiescent current standby regulator Y Microprocessor malfunction RESET flag Y Delayed RESET on power-up Y Accurate pretrimmed 5V outputs Y Reverse battery protection Y Overvoltage protection Y Reverse transient protection Y Short circuit protection Y Internal thermal overload protection Y ONOFF switch for high current outputs Y 100% electrical burn-in in thermal limit Typical Application Circuit LM2984C TLH8821 – 1 Order Number LM2984CT See NS Package Number TA11B COUT must be at least 10 mFto maintain stability May be increased without bound to maintain regulation during transients Locate as close as possible to the regulator This capac- itor must be rated over the same op- erating temperature range as the regulator The equivalent series re- sistance (ESR) of this capacitor is critical see curve C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
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