L79L05 - L79L00 SERIES NEGATIVE VOLTAGE REGULATORS s s s s...

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1/15 August 2003 OUTPUT CURRENT UP TO 100 mA OUTPUT VOLTAGES OF -5; -6; -8; -9; -12; -15 V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION NO EXTERNAL COMPONENTS ARE REQUIRED AVA ILABLEINE ITHER±5%(AC)OR±10% (C) SELECTION DESCRIPTION The L79L00 series of three-terminal negative regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or 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. The L79L00 series used as Zener diode/resistor combination replacement, offers an effective output impedance improvement of typically two orders of magnitude, along with lower quiescent current and lower noise. L79L00 SERIES NEGATIVE VOLTAGE REGULATORS SCHEMATIC DIAGRAM SO-8
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L79L00 SERIES 2/15 ABSOLUTE MAXIMUM RATINGS (*) Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically communed to the die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to dissipate power when an appro- priate area of copper on the printed circuit board is available for heat-sinking. The external dimensions are the same as for the standard SO-8. THERMAL DATA (*) Considering 6 cm 2 of copper Board heat-sink. CONNECTION DIAGRAM (top view) Symbol Parameter² Value Unit V I DC Input Voltage V O =-5to-9V -30 V V O = -12 to -15 V -35 I O Output Current 100 mA P tot Power Dissipation Internally Limited (*) T stg Storage Temperature Range -40 to 150 °C T op Operating Junction Temperature Range For L79L00C, L79L00AC 0 to 125 °C For L79L00AB -40 to 125 °C Symbol Parameter SO-8 TO-92 SOT-89 Unit R thj-case Thermal Resistance Junction-case Max 20 15 °C/W R thj-amb Thermal Resistance Junction-ambient Max 55 (*) 200 °C/W SO-8 TO-92 PIN 1 = GND PIN 2 = V IN PIN 3 = V OUT SOT-89 BOTTOM VIEW
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3/15 ORDERING CODES TEST CIRCUITS TYPE SO-8 (TUBE)* TO-92 (TUBE)** OUTPUT VOLTAGE L79L05C L79L05CD L79L05CZ -5 V L79L05AC L79L05ACD L79L05ACZ L79L05ACU -5 V L79L05AB L79L05ABD L79L05ABZ L79L05ABU -5 V L79L06C L79L06CD L79L06CZ -6 V L79L06AC L79L06ACD L79L06ACZ L79L06ACU -6 V L79L06AB L79L06ABD L79L06ABZ L79L06ABU -6 V L79L08C L79L08CD L79L08CZ -8 V L79L08AC L79L08ACD L79L08ACZ L79L08ACU -8 V L79L08AB L79L08ABD L79L08ABZ L79L08ABU -8 V L79L09C L79L09CD L79L09CZ -9 V L79L09AC L79L09ACD L79L09ACZ L79L09ACU -9 V L79L09AB L79L09ABD L79L09ABZ L79L09ABU -9 V L79L12C L79L12CD L79L12CZ -12 V L79L12AC L79L12ACD L79L12ACZ L79L12ACU -12 V
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This note was uploaded on 06/17/2010 for the course ECE 500 taught by Professor Ma during the Spring '10 term at Abraham Baldwin Agricultural College.

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L79L05 - L79L00 SERIES NEGATIVE VOLTAGE REGULATORS s s s s...

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