Adjustable voltage and current regulator - st.com

1 L200 Adjustable voltage AND current REGULATORADJUSTABLE OUTPUT current UP TO 2 A(GUARANTEED UP TO Tj = 150 C) Adjustable OUTPUT voltage DOWN VINPUT OVERVOLTAGE PROTECTION (UP TO60 V, 10 ms)SHORT CIRCUIT PROTECTIONOUTPUT TRANSISTOR PROTECTIONTHERMAL OVERLOAD PROTECTIONLOW BIAS current ON REGULATION PINLOW STANDBY current DRAINDESCRIPTIONThe L200 is a monolithic integrated circuit for volt-age and current programmable regulation. It isavailable in Pentawatt package or 4-lead TO-3metal case. current limiting, power limiting, thermalshutdown and input overvoltage protection (up toJanuary 2000 Pentawatt TO-3 (4 lead)60 V) make the L200 virtually blow-out L200 can be used to replace fixed voltageregulators when high output voltage precision isrequired and eliminates the need to stock a rangeof fixed voltage regulators. SymbolParameterValueUnitViDC Input Voltage40 VViPeak Input voltage (10 ms)60V Vi-oDropout Voltage32 VIoOutput Currentinternally limited PtotPower Dissipationinternally limited TstgStorage Temperature-55 to 150 CTopOperating Junction Temperature for L200C-25 to 150 C for L200-55 to 150 CABSOLUTE MAXIMUM RATINGS TO-3 Pentawatt Rth j-caseThermal Resistance Junction-caseMax 4 C/W3 C/WRth j-ambThermal Resistance Junction-ambientMax 35 C/W50 C/WTHERMAL DATA1/122/12 CONNECTION DIAGRAMS AND ORDER CODES (top views)BLOCK DIAGRAMAPPLICATION CIRCUITSF igure 1.

2 programmable voltage regulator with current LimitingFigure 2. programmable current TO-3L200L200 T L200 CL200 CHL200 CV L200 CTL200 SCHEMATIC DIAGRAMS ymbolParameterTest REGULATION LOOPIdQuiescent drain current (pin 3)Vi = 20 Noise VoltageVo = Vref Io = 10 mAB = 1 MHz80 VVoOutput voltage RangeIo = 10 VoVoVoltage Load Regulation(note 1) Io = 2 A Io = Vi VoLine RegulationV0 = 5 VVi = 8 to 18 V4860dBSVRS upply voltage RejectionV0 = 5 V Io = 500 mA Vi = 10 Vppf = 100 Hz (note 2)4860dB Vi-oDroupout voltage between Pins 1and 5Io = A V0 2% voltage (pin 4)Vi = 20 V Io = 10 CHARACTERISTICS (Tamb = 25 C, unless otherwise specified)3/12L200 SymbolParameterTest VrefAverage Temperature Coefficientof Reference VoltageVi = 20 V Io = 10mA for Tj = - 25 to 125 C for Tj = 125 to 150 CmV/ CI4 Bias current and Pin 4 310 A I4 T I4 Average TemperatureCoefficient (pin 4) CZoOutput ImpedanceVi = 10 V Vo = VrefIo = A f = 100 Hz current REGULATION LOOPVSCC urrent Limit Sense voltage between Pins 5 and 2Vi = 10 V Vo = VrefI5 = 100 VSC T VSCA verage Temperature Coefficient of VSC C IoIoCurrent Load RegulationVi = 10 V Vo = 3 VIo = AIo = 1 AIo = A Short Circuit CurrentVi - V0 = 14 V(pins 2 and 5 short circuited) CHARACTERISTICS (continued)4/12 Figure 3.

3 Typical Safe Operating 4. Quiescent current vs. Supply Vo l t a g e .Note 1: A load step of 2 A can be applied provited that input-output differential voltage is lower than 20 V (see Figure 3).Note 2: The same performance can be maintained at higher output levels if a bypassing capacitor is provited between pins 2 and 5. Quiescent current vs. 6. Quiescent current vs. 7. Output Noise voltage vs. Output 8. Output Noise voltage vs. 9. Reference voltage vs. 10. voltage Load Regulation 11. Supply voltage Rejection 12. Dropout voltage vs. Junction 13. Output Impedance 14. Output Impedance vs. 15. voltage Transient 16. Load Transient 17. Load Transient Reponse Figure 19. - programmable voltage regulator Figure 18. current Limit Sense voltage 20. - Board and Components Layoutof Figure 19.

4 Figure 21. - High current voltage regulator withShort Circuit 22. - Digitally Selected regulator CIRCUITS7/12L2008/12 Figure 23. programmable voltage and current : Connecting point A to a negative voltage (for example - 3V/10 mA) it is possible to extend the output voltage range down to 0 V and obtain the current limiting down to this level (output short-circuit condition).Figure 24. High current regulator with NPNPass 25. High current Tracking 26. High Input and Output 28. 30 W Motor Speed 27. Constant current Battery 29. Loww Turn 30. Light resistors R1 and R2 determine the final charging volt-age and RSC the initial charging current . D1 prevents dis-charge of the battery throught the resistor RL limits the reverse currents through therregulator (which should be 100 mA max) when the bat-tery is accidentally reverse connected.

5 If RL is in serieswith a bulb of 12 V/50 mA rating this will indicate incor-rect (typ.) BETWEENLEADSH1V3H2L8 VVV1 BVVV4V4 OUTLINE ANDMECHANICAL DATAL200TO3 (*) (typ.)O30 (typ.) (*) Measured with GaugeOUTLINE ANDMECHANICAL DATA11/12L20012/12 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences ofuse of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is grantedby implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject tochange without notice. This publication supersedes and replaces all information previously supplied.

6 STMicroelectronics products are notauthorized for use as critical components in life support devices or systems without express written approval of ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics Printed in Italy All Rights ReservedSTMicroelectronics GROUP OF COMPANIESA ustralia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco -Singapore - Spain - Sweden - Switzerland - United Kingdom.