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| UTC 79DXX LINEAR INTEGRATED CIRCUIT 3 TERMINAL 0.5A NEGATIVE VOLTAGE REGULATOR DESCRIPTION The UTC 79DXX series of three-terminal negative regulators are available in TO-252 and TO-251 packages and with several fixed output voltage, making them useful in a wide range of application. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. 1 TO-252 FEATURES *Output current up to 0.5A *-5V; -6V;-8V;-12V;-15V;-18V;-24V output voltage available *Thermal overload protection *Short circuit protection 1 TO-251 1: GND 2: Input 3: Output BLOCK DIAGRAM GND R1 R2 OUTPUT Voltage reference Protection circuitry RSC INPUT UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R101-012,D UTC 79DXX PARAMETER Input voltage (for Vo=-5 ~ -18V) (for Vo=-20 ~-24V) LINEAR INTEGRATED CIRCUIT SYMBOL Vi R JA R JC Topr Tstg ABSOLUTE MAXIMUM RATINGS (Ta=25C) VALUE -35 -40 65 5 0 ~ +125 -65 ~ +150 UNIT V C /W C /W C C Thermal resistance junction-air Thermal resistance junction-cases Operating Temperature Storage Temperature UTC 79D05 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 UTC 79D06 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 -0.5 130 60 2 UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R101-012,D UTC 79DXX LINEAR INTEGRATED CIRCUIT UTC 79D08 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 UTC 79D09 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 UTC 79D12 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R101-012,D UTC 79DXX Output noise voltage Ripple rejection Dropout voltage LINEAR INTEGRATED CIRCUIT VN RR Vd f=10Hz to 100kHz,Ta=25C f=120Hz, Vi=-15V to -25V Io=0.5A,Tj=25C 54 200 60 2 V dB V UTC 79D15 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 UTC 79D18 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 -1 300 60 2 UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R101-012,D UTC 79DXX LINEAR INTEGRATED CIRCUIT UTC 79D24 ELECTRICAL CHARACTERISTICS (Refer to test circuits, 0 -1 400 60 2 APPLICATION CIRCUITS C1 2.2 F 1 -Vi 2 C0 1 F -Vo UTC 79DXX 3 Fig.1 Fixed output regulator +20V 1 0.33 F +15V 3 0.1 F 1N4001 UTC 78D15 2 2.2 F 2 -20V 1 1 F 3 1N4001 UTC 79D15 -15V Fig.2 Split power supply (+-15V, 0.5A) UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R101-012,D UTC 79DXX LINEAR INTEGRATED CIRCUIT C1 2.2 F 2 -Vi C3 2.5 F 1 R1 C2 1 F R2 UTC 79DXX 3 -Vo Fig.3 Circuit for increasing output voltage UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R101-012,D |
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