7908 ETC | Alldatasheet
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Technical content
7908 THREE-TERMINAL NEGATIVE VOLTAGE REGULATOR IC FEATURES: - OUTPUT CURRENT IN EXCESS OF 1A; - NO EXTERNAL COMPONENTS REQUIRED; - INTERNAL SHORT CIRCUIT CURRENT LIMITING; - INTERNAL THERMAL OVERLOAD PROTECTION; - OUTPUT TRANSISTOR SAFE-AREA COMPENSATION; - OUTPUT VOLTAGE OFFERED IN 4% TOLERANCE. ABSOLUTE MAXIMUM RATINGS (Ta= 25° C) Characteristic Symbol Norm Unit Input Voltage Vin V -35 Maximum Dissipated Power(with heat sink) Ptot(max) W 15 Maximum Dissipated Power(without heat sink) Ptot(max) W 1.5 Thermal Resistance Junction to Case OjC °C/W 5.0 Thermal Resistance, Junction to Air OjA °C/W 65 Junction Temperature Tj °C 150 TO-220 1. GND 2. Input 3. Output Tc=-45÷+70°C
ELECTRICAL CHARACTERISTICS
(Vin=-14V,Io=0.5A,Ci=2.2mkF,Co=1.0mkF,Tj=0+125°C, unless otherwise noted.) Characteristic Symbo l Norm Unit Min TYP Max Output Voltage(Tj=25°C) Vo -7.7 -8.3 V Output Voltage (5.0mA≤Io≤1.0A,Po≤15W) -10,5V≥Vin≥-23V Vo -7.6 -8.4 V Line Regulation(Tj=+25°C, Io=0,1A) -10,5 V≥Vin≥-25 V -11V≥Vin≥-17 V (Tj=+25°C, Io=0,5A) -10,5 V≥Vin≥-25 V -11V≥Vin≥-17 V ∆Vv 160 mV Load Regulation(Tj=+25°C) 5.0mA≤Io≤1.5A 0.25A≤Io≤0.75A ∆Vi 160 mV Quiescent Current(Tj=+25°C) Ib 8.0 mA Quiescent Current Change -10.5 V≥Vin≥-25 V 5.0mA≤Io≤1.5 A ∆Ib 1.0 0.5 mA Dropout Voltage (Io=1.0A,Tj=+25°C) Vi-Vo 2.0 V Average Temperature Coefficient of Output Voltage TCVo 0,5 mV/°C