TS317 3-Terminal Adjustable Positive Voltage Regulator TO-220 Pin Definition: 1. Adjustable 2. Output 3. Input Heatsink is connected to Pin 2 General Description The TS317 is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5A over an output voltage range of 1.25 V to 37 V. This voltage regulator is exceptionally easy to use and require only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow-out proof. Standard Application Circuit Output Voltage Range 1.25 to 37V Eliminates Stocking Many Fixed Voltages Internal Thermal Overload Protection Current Limit Constant with Temperature Output transistor safe-area compensation Output voltage offered in 4% tolerance Floating Operation for High Voltage Applications Ordering Information Part No. Cin is required if regulator is located an appreciable distance from power supply filter. Co is not needed for stability, however, it does improve transient response. Vout = 1.25 V(1 + R2 / R1 ) + IAdjR2 Since IAdj is controlled to less than 100 µA, the error associated with this term is negligible in most applications Absolute Maximum Rating (Ta = 25oC unless otherwise noted) Parameter Input Voltage Power Dissipation Internal Limited Operating Junction Temperature Storage Temperature Range

TS317 3-Terminal Adjustable Positive Voltage Regulator Thermal Performance Condition Thermal Resistance Junction to Air Thermal Resistance Junction to Case Electrical Characteristics (VI -VO = 5.0 V, Io=500mA for TO-220/TO-263 packages, Io=200mA for TO-252/SOT-223 package) Parameter Figure Symbol Min. Typ. Max. Unit Reference voltage, 3V ≤ Vi-Vo ≤ 40V 3 Vref 1.20 1.25 1.30 V 10mA ≤ Io ≤ Imax, Pd ≤ Pmax, Line regulation (Note 3) 1 REGline -0.01 0.07 %/V o Ta = 25 C, 3V≤Vi-Vo≤40V o Load regulation Ta = 25 C, 10mA ≤ IO ≤ Imax (Note 2) VO ≤ 5.0 2 REGload -5.0 25 mV VO ≥ 5.0 -0.1 0.5 %V o Thermal...

Line Regulation (%A/J = vQH-VQL X10O Load Regulator (mV) - Vo(min. Load) - Vo(max. Load) Vo(min. Load)-Vo(max. Load) A Vo(min. Load) Pulse Testing Required: 1% Duty Cycle is Suggested Pulse Testing Required: 1% Duty Cycle is Suggested Pulse Testing Required: 1% Duty Cycle is Suggested Output is Snorted to Ground

V| -Vo - Input - Output Voltage Differential (Vdc)

TS317 3-Terminal Adjustable Positive Voltage Regulator Application information Basic Circuit Operation The TS317 is a 3-terminal floating regulator. In operation, the TS317 develops and maintains a nominal 1.25V reference (Vref) between its output and adjustment terminals. This reference voltage is converted to a programming current (Iprog.) by R1 (see Figure 17), and this constant current flows through R2 to ground. The regulated output voltage is given by: Vout = Vref ( 1 + R2 / R1 ) + Iadj * R2 Since the current from the adjustment terminal (Iadj) represents an error term in the equation,...

Diodes D1 and D2 and transistor Q2 are added to allow adjustment of output voltage to OV. * D6 protects both TS31 7's during an input short circuit * To provide current limiting of l0to the system ground, the source of the FET must be tied to a negative voltage below - 1.25 V. * Di protects the device during an input short circuit.

TS317 3-Terminal Adjustable Positive Voltage Regulator Application information (Continue) Figure 22. Slow Turn-on Regulator Figure 23. Current Regulator

TS317 3-Terminal Adjustable Positive Voltage Regulator Application Information Figure 24. D PAK Thermal Resistance and Maximum Power Dissipation vs. P.C.B Copper Length Figure 25. DPAK Thermal Resistance and Maximum Power Dissipation vs. P.C.B Copper Length Figure 26. SOT-223 Thermal Resistance and Maximum Power Dissipation vs. P.C.B Copper Length

TS317 3-Terminal Adjustable Positive Voltage Regulator TO-220 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 10.000 10.500 0.394 0.413 3.740 = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) = Lot Code = Package Code for TO-220

TS317 3-Terminal Adjustable Positive Voltage Regulator = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) L = Lot Code CM = Package Code for TO-263

TS317 3-Terminal Adjustable Positive Voltage Regulator = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) = Lot Code = Package Code for TO-252

TS317 3-Terminal Adjustable Positive Voltage Regulator = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) L = Lot Code CW = Package Code for TO-223

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