Adjustable Voltage And Current Regulator

L200 ADJUSTABLE VOLTAGE AND CURRENT REGULATORADJUSTABLE OUTPUT CURRENT UP TO 2 A(GUARANTEED UP TO Tj 150 C)ADJUSTABLE OUTPUT VOLTAGE DOWN TO2.85 VINPUT OVERVOLTAGE PROTECTION (UP TO60 V, 10 ms)SHORT CIRCUIT PROTECTIONOUTPUT TRANSISTOR S.O.A. PROTECTIONTHERMAL OVERLOAD PROTECTIONLOW BIAS CURRENT ON REGULATION PINLOW STANDBY CURRENT DRAINDESCRIPTIONThe L200 is a monolithic integrated circuit for voltage 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 toPentawatt TO-3 (4 lead)60 V) make the L200 virtually blow-out proof.The 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.ABSOLUTE MAXIMUM RATINGSSymbolValueUnitViDC Input VoltageParameter40VViPeak Input Voltage (10 ms)60V Vi-oDropout Voltage32VIoOutput Currentinternally limitedPtotPower Dissipationinternally limitedTstgStorage TemperatureTopOperating Junction Temperature for L200Cfor L200-55 to 150 C-25 to 150 C-55 to 150 CTHERMAL DATATO-3Pentawatt Rth j-caseThermal Resistance Junction-caseMax4 C/W3 C/WRth j-ambThermal Resistance Junction-ambientMax35 C/W50 C/WJanuary 20001/12

L200CONNECTION DIAGRAMS AND ORDER CODES (top views)TypePentawatt L200L200 CTO-3L200 TL200 CHL200 CVL200 CTBLOCK DIAGRAMAPPLICATION CIRCUITSFigure 1. Programmable Voltage Regulatorwith Current Limiting2/12Figure 2. Programmable Current Regulator.

L200SCHEMATIC DIAGRAMELECTRICAL CHARACTERISTICS (Tamb 25 C, unless otherwise specified)SymbolParameterTest ConditionsMin.Typ.Max.Unit4.29.2mAVOLTAGE REGULATION LOOPIdQuiescent drain Current (pin 3)Vi 20 VeNOutput Noise VoltageVo VrefB 1 MHzVo VoVo ViµV80Output Voltage RangeIo 10 mAVoltage Load Regulation(note 1) Io 2 A Io 1.5 ALine RegulationV0 5 VVi 8 to 18 V4860dBV0 5 VIo 500 mA Vi 10 Vppf 100 Hz (note 2)4860dB VoSVRIo 10 mASupply Voltage Rejection2.850.150.1 Vi-oDroupout Voltage between Pins 1and 5Io 1.5 A V0 2%VrefReference Voltage (pin 4)Vi 20 VIo 10 mA2.6436V10.9%%22.5V2.772.86V3/12

L200ELECTRICAL CHARACTERISTICS (continued)SymbolParameter VrefAverage Temperature Coefficientof Reference VoltageI4 I4Test ConditionsVi 20 VMin.Io 10mAfor Tj - 25 to 125 Cfor Tj 125 to 150 C3Average TemperatureCoefficient (pin 4)ZoOutput ImpedanceVi 10 VIo 0.5 AVo Vreff 100 HzVi 10 VI5 100 mAVo VrefMax.-0.25-1.5Bias Current and Pin 4 T I4Typ.UnitmV/ CmV/ C10µA-0.5%/ C1.5mΩCURRENT REGULATION LOOPVSC VSC T VSC IoCurrent Limit Sense Voltagebetween Pins 5 and 2Average TemperatureCoefficient of VSCCurrent Load RegulationIoISC0.38Peak Short Circuit CurrentVi 10 VIo 0.5 AIo 1AIo 1.5 A Vo 3VVi - V0 14 V(pins 2 and 5 short circuited)0.450.520.03%/ C1.410.9%%%3.6Note 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 4.Figure 3. Typical Safe Operating AreaProtection.4/12VFigure 4. Quiescent Current vs. SupplyVoltage.A

L200Figure 5. Quiescent Current vs. JunctionVoltage.Figure 6. Quiescent Current vs. OutputCurrent.Figure 7. Output Noise Voltage vs. OutputVoltage.Figure 8. Output Noise Voltage vs.Frequency.Figure 9. Reference Voltage vs. JunctionTemperature.Figure 10. Voltage Load Regulation vs.Junction Temperature.5/12

L200Figure 11. Supply Voltage Rejection vs.Frequency.Figure 12. Dropout Voltage vs. JunctionTemperature.Fi g ure 13 . Ou tpu t Imped ance vs.Frequency.Figure 14. Output Impedance vs. OutputCurrent.Figure 15. Voltage Transient Reponse.Figure 16. Load Transient Reponse.6/12

L200Figure 17. Load Transient ReponseFigure 18. Current Limit Sense Voltage vs.Junction Temperature.APPLICATIONS CIRCUITSFigure 19. - Programmable Voltage RegulatorFigure 20. - P.C. Board and Components Layoutof Figure 19.Figure 21. - High Current Voltage Regulator withShort Circuit Protection.Figure 22. - Digitally Selected Regulator withInhibit.7/12

L200Figure 23. Programmable Voltage and Current Regulator.Note: Connecting point A to a negative voltage (for example - 3V/10 mA) it is possible to extend the output voltagerange down to 0 V and obtain the current limiting down to this level (output short-circuit condition).Figure 24. High Current Regulator with NPNPass Transistor.8/12Figure 25. High Current Tracking Regualtor.

L200Figure 26. High Input and Output Voltage.Figure 27. Constant Current Battery Charger.The resistors R1 and R2 determine the final charging voltage and R SC the initial charging current. D1 prevents discharge of the battery throught the regulator.The resistor RL limits the reverse currents through therregulator (which should be 100 mA max) when the battery is accidentally reverse connected. If RL is in serieswith a bulb of 12 V/50 mA rating this will indicate incorrect connection.Figure 28. 30 W Motor Speed Control.Figure 29. Loww Turn on.Figure 30. Light Controller.9/12

.75 0.1674.25 0.14840 (typ.)0.0080.1770.157OUTLINE ANDMECHANICAL 6220.2600.1870.167Pentawatt VLL1V3VVEL8VV1VM1RRABDCD1L5L2RMV4H2L3FEV4H3 H1G G1Dia.FF1L7H2V4L6L9RESIN BETWEENLEADS10/12E1

L200mmDIM.MIN.TYP.A11.8B 200.78G12.70.50N50 (typ.)O30 (typ.)PR26.23.884.20UV1.030.150.1639.530.1OUTLINE ANDMECHANICAL DATA1.551.18TO3 4-Leads(*) Measured with Gauge11/12

L200Information 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. STMicroelectronics products are notauthorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.The ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics – Printed in Italy – All Rights ReservedSTMicroelectronics GROUP OF COMPANIESAustralia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.http://www.st.com12/12

APPLICATIONS CIRCUITS 7/12 L200. 8/12 Figure 23. Programmable Voltage and Current Regulator. Note: 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 NPN Pass Transistor. Figure 25. High Current .