TSC TS7900 3-Terminal Negative Output Voltage Regulators TO-220 TO-220F Voltage Range -5 to -24 Volts 1 1 Current 2 2 3 3 1 Ampere Pin: 1. Ground 2. Input 3. Output (Heatsink surface connected to Pin 2.) Features Ordering Informations Output Current up to 1 Ampere Device Operating Package No External Components Required Temperature Internal Thermal Overload Protection (Ambient) Internal Short-Circuit Current Limiting Output Transistor Safe-Area TS79xxCZ TO-220 Compensation -20C ~ +85C Available in 4% Voltage Tolerance TS79xxCI TO-220F Maximum Ratings (Ta=25C) Rating Symbol TS7900 Series Unit Input Voltage Vin *1 -35 V Input Voltage Vin *2 -40 V Power Dissipation P W D TO-220 15 TO-220F 10 Operating Ambient Temperature Topr -20 to +85 C Operating Junction Temperature Tj 0 to +125 C Storage Temperature Tstg -25 to +125 C Note: *1: TS7905 to TS7918 *2: TS7924 Follow the derating curve. When Tj exceeds 150C, the internal circuit cuts off the output. Standard Application Internal Block Diagram A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V more negative even during the high point on the input ripple voltage. XX = these two digits of the type number indicate voltage. Cin is required if regulator is located an appreciable distance from power supply filter. Co improves stability and transient response. Rev. 1 03/2003 - 1 -TSC TS7905 Electrical Characteristics (Vin = -10V, Iout = 500mA, Cin = 2F, Cout = 1F Tj = 0C to 125C, unless otherwise specified.) Characteristic Symbol Test Circuit Condition Min Typ Max Unit Output Voltage Vo 1 Tj=25C -4.80 -5.0 -5.20 V Output Voltage Tolerance Vo 1 Vi=-7 to -20V, Io=5mA to 1A, -4.75 -5.0 -5.25 V P <15W D Line Regulation REGline 1 Tj=25C Vi=-7 to -25V -- 3 100 mV Vi=-8 to -12V -- 1 50 mV Load Regulation REGload 1 Tj=25C Io=5mA to 1.5A -- 10 100 mV Io=250mA to 750mA -- 3 50 mV Quiescent Current Iq 3 Tj=25C -- 2 4 mA Quiescent Current Change 6 Iq 3 VIN=-7 to -25V -- -- 1.3 mA Io=5mA to 1.5A -- -- 0.5 mA Output Noise Voltage Vn 1 f=10Hz to 100KHz, Ta=25C -- 40 -- V Ripple Rejection Ratio RR 2 Vi=-8 to -18V, Io=100mA, 62 74 -- dB f=120Hz Min. I/O Voltage Difference Vdif Io=1A, Tj=25C -- 1.1 -- V Peak Output Current Io-peak 1 Tj=25C -- 2.1 -- A Output Voltage 6 Vo/Ta 1 Io=5mA, Tj=0 to 125C -- -0.4 -- mV/C Temperature Coefficient TS7906 Electrical Characteristics (Vin = -11V, Iout = 500mA, Cin = 2F, Cout = 1F Tj = 0C to 125C, unless otherwise specified.) Characteristic Symbol Test Circuit Condition Min Typ Max Unit Output Voltage Vo 1 Tj=25C -5.75 -6.0 -6.25 V Output Voltage Tolerance Vo 1 Vi=-8 to -21V, Io=5mA to 1A, -5.70 -6.0 -6.30 V P <15W D Line Regulation REGline 1 Tj=25C Vi=-8 to -25V -- 4 120 mV Vi=-9 to -13V -- 1.5 60 mV Load Regulation REGload 1 Tj=25C Io=5mA to 1.5A -- 10 120 mV Io=250mA to 750mA -- 3 60 mV Quiescent Current Iq 3 Tj=25C -- 2 4 mA Quiescent Current Change 6 Iq 3 Vi=-8 to -25V, Tj=25C -- -- 1.3 mA Io=5mA to 1.5A, Tj=25C -- -- 0.5 mA Output Noise Voltage Vn 1 f=10Hz to 100KHz, Ta=25C -- 44 -- V Ripple Rejection Ratio RR 2 Vi=-9 to -19V, Io=100mA, 60 73 -- dB f=120Hz Min. I/O Voltage Difference Vdif Io=1A, Tj=25C -- 1.1 -- V Peak Output Current Io-peak 1 Tj=25C -- 2.1 -- A Output Voltage 6 Vo/Ta 1 Io=5mA, Tj=0 to 125C -- -0.5 -- mV/C Temperature Coefficient Rev. 1 03/2003 Note: The specified condition Tj=25C means that the test should be carried out with the test time so short (within 10mS), that the drift in characteristic value due to the rise in chip junction temperature can be ignored. - 2 -