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| LM133 LM333 3-Ampere Adjustable Negative Regulators November 1995 LM133 LM333 3-Ampere Adjustable Negative Regulators General Description The LM133 LM333 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of b3 0A over an output voltage range of b1 2V to b32V These regulators are exceptionally easy to apply requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation The circuit design has been optimized for excellent regulation and low thermal transients Further the LM133 series features internal current limiting thermal shutdown and safe-area compensation making them substantially immune to failure from overloads The LM133 LM333 serve a wide variety of applications including local on-card regulation programmable-output voltage regulation or precision current regulation The LM133 LM333 are ideal complements to the LM150 LM350 adjustable positive regulators Features Y Y Y Y Y Y Y Y Y Y Y Output voltage adjustable from b1 2V to b32V 3 0A output current guaranteed b55 C to a 150 C Line regulation typically 0 01% V Load regulation typically 0 2% Excellent rejection of thermal transients 50 ppm C temperature coefficient Temperature-independent current limit Internal thermal overload protection P a Product Enhancement tested Standard 3-lead transistor package Output is short circuit protected Connection Diagrams TO-3 Metal Can Package Typical Applications Adjustable Negative Voltage Regulator TL H 9065-1 Bottom View Steel TO-3 Metal Can Package (K STEEL) Order Number LM133K STEEL or LM333K STEEL See NS Package Number K02A TO-220 Plastic Package TL H 9065 - 3 b VOUT e b 1 25V 1a R2 120X J a b IADJ c R2 J C1 e 1 mF solid tantalum or 10 mF aluminum electrolytic required for stability C2 e 1 mF solid tantalum is required only if regulator is more than 4 from power supply filter capacitor Output capacitors in the range of 1 mF to 1000 mF of aluminum or tantalum electrolytic are commonly used to provide lower output impedance and improved transient response TL H 9065-2 Front View 3-Lead TO-220 Plastic Package (T) Order Number LM333T See NS Package Number T03B C1995 National Semiconductor Corporation TL H 9065 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note 1) b 65 C to a 150 C Storage Temperature Lead Temperature (Soldering 10 sec ) TO-3 Package 300 C TO-220 Package 260 C ESD Susceptibility TBD If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Power Dissipation Internally Limited Input-Output Voltage Differential 35V Operating Junction Temperature Range TMIN to TMAX b 55 C to a 150 C LM133 b 40 C to a 125 C LM333 Electrical Characteristics LM133 Specifications with standard typeface are for TJ e 25 C and those with boldface type apply over the full operating temperature range (Note 3) Parameter Reference Voltage Conditions IL e 10 mA 3V s lVIN b VOUTl s 35V 10 mA s IL s 3A P s PMAX Line Regulation Load Regulation Thermal Regulation Temperature Stability Long Term Stability Adjust Pin Current Adjust Pin Current Change Minimum Load Current Current Limit (Note 5) 10 mA s IL s 3A 3 0V s lVIN b VOUTl s 35V 3V s lVIN b VOUTl s 35V IOUT e 50 mA (Note 4) 10 mA s IOUT s 3A P s PMAX (Notes 4 5) 10 ms Pulse TMIN s TJ s TMAX TJ e 125 C 1000 Hours Typical b 1 250 b 1 250 Min (Note 2) b 1 238 b 1 225 Max (Note 2) b 1 262 b 1 275 Units V V %V % %W % % 0 01 0 02 02 04 0 002 04 0 15 65 70 2 25 12 39 24 04 0 003 30 1 25 03 0 02 0 05 05 10 0 01 90 100 6 50 25 mA mA lVIN b VOUTl s 35V lVIN b VOUTl s 10V 3V s lVIN b VOUTl s 10V lVIN b VOUTl e 20V lVIN b VOUTl e 30V 10 Hz to 10 kHz VOUT e 10V f e 120 Hz CADJ e 0 mF CADJ e 10 mF TO-3 Package (K STEEL) mA A Output Noise (% of VOUT) Ripple Rejection % (rms) 60 77 12 163 150 18 190 dB CW C Thermal Resistance Junction-to-Case Thermal Shutdown Temperature 2 Electrical Characteristics LM333 Specifications with standard typeface are for TJ e 25 C and those with boldface type apply over the full operating temperature range (Note 3) Parameter Reference Voltage Conditions IL e 10 mA 3V s lVIN b VOUTl s 35V 10 mA s IL s 3A P s PMAX Line Regulation Load Regulation Thermal Regulation Temperature Stability Long Term Stability Adjust Pin Current Adjust Pin Current Change Minimum Load Current Current Limit (Note 5) 10 mA s IL s 3A 3 0V s lVIN b VOUTl s 35V 3V s lVIN b VOUTl s 35V IOUT e 50 mA (Note 4) 10 mA s IL s 3A P s PMAX (Notes 4 and 5) 10 ms Pulse TMIN s TJ s TMAX TJ e 125 C 1000 Hours Typical b 1 250 b 1 250 Min (Note 2) b 1 225 b 1 213 Max (Note 2) b 1 275 b 1 287 Units V 0 01 0 02 02 04 0 002 05 02 65 70 25 25 15 39 24 04 0 003 30 10 0 20 0 04 0 07 10 15 0 02 %V % %W % % 95 100 8 10 50 mA mA lVIN b VOUTl s 35V lVIN b VOUTl s 10V 3V s lVIN b VOUTl s 10V lVIN b VOUTl e 20V lVIN b VOUTl e 30V 10 Hz to 10 kHz VOUT e 10V f e 120 Hz CADJ e 0 mF CADJ e 10 mF TO-3 Package (K STEEL) TO-220 Package (T) mA A Output Noise (% of VOUT) Ripple Rejection % (rms) 60 77 12 3 163 18 4 dB Thermal Resistance Junction to Case Thermal Shutdown Temperature Thermal Resistance Junction to Ambient (No Heatsink) CW C K Package T Package 35 50 CW Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Electrical specifications do not apply when operating the device outside of its stated operating conditions Note 2 All limits are guaranteed at either room temperature (standard type face) or at temperature extremes (bold typeface) by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods Note 3 Unless otherwise specified l VIN b VOUTl e 5V IOUT e 0 5A PDISS s 30W Note 4 Load and line regulation are measured at constant junction temperature using low duty cycle pulse testing (output voltage changes due to heating effects are covered by the Thermal Regulation specification) For the TO-3 package load regulation is measured on the output pin below the base of the package Note 5 The output current of the LM333 is guaranteed to be t 3A in the range 3V s l VIN b VOUTl s 10V For the range 10V s l VIN b VOUTl s 15V the guaranteed minimum output current is equal to 30 (VIN b VOUT) Refer to graphs for guaranteed output currents at other voltages 3 Guaranteed Performance Characteristics LM133 Guaranteed Output Current LM333 Guaranteed Output Current TL H 9065-4 TL H 9065 - 5 Typical Applications (Continued) b 5 2V Regulator with Electronic Shutdown TL H 9065 - 6 Negative Regulator with Protection Diodes When CL is larger than 20 mF D1 protects the LM133 in case the input supply is shorted When C2 is larger than 10 mF and b VOUT is larger than b 25V D2 protects the LM133 in case the output is shorted In case VOUT is shorted to a positive supply D3 protects the LM133 from overvoltage and protects the load from reversed voltage TL H 9065 - 7 4 Typical Applications (Continued) High-Performance 9-Ampere Adjustable Regulator Wire R1 and R4 to the regulator that provides the highest VOUT with a 3A load Full output current requires 5V s l VIN -VOUTl s 10V At higher input-output voltages load current will be less (see guaranteed curves) TL H 9065 - 8 Current Regulator High Stability 10V Regulator VREF IOUT e R1 0 4X s R1 s 120X TL H 9065-9 TL H 9065 - 10 5 Typical Applications (Continued) High-Current Adjustable Regulator Control regulator must have the largest VREF Full output current requires 5V s l VIN -VOUTl s 10V At higher input-output voltages load current will be less (see guaranteed curves) TL H 9065 - 11 Adjustable Lab Voltage Regulator Adjustable Current Regulator TL H 9065 - 13 IOUT e J 1 5V R1 g15% adjustable 0 5X s R1 s 24X TL H 9065 - 12 The 10 mF capacitors are optional to improve ripple rejection 6 Typical Applications (Continued) THERMAL REGULATION When power is dissipated in an IC a temperature gradient occurs across the IC chip affecting the individual IC circuit components With an IC regulator this gradient can be especially severe since the power dissipation is large Thermal regulation is the effect of these temperature gradients on output voltage (in percentage output change) per watt of power change in a specified time Thermal regulation error is independent of electrical regulation or temperature coefficient and occurs within 5 ms to 50 ms after a change in power dissipation Thermal regulation depends on IC layout as well as electrical design The thermal regulation of a voltage regulator is defined as the percentage change of VOUT per watt within the first 10 ms after a step of power is applied The LM133's specification is 0 01% W max In Figure 1 a typical LM133's output drifts only 2 mV (or 0 02% of VOUT e b10V) when a 20W pulse is applied for 10 ms This performance is thus well inside the specification limit of 0 01% W c 20W e 0 2% max When the 20W pulse is ended the thermal regulation again shows a 2 mV step as the LM133 chip cools off Note that the load regulation error of about 1 mV (0 01%) is additional to the thermal regulation error In Figure 2 when the 20W pulse is applied for 100 ms the output drifts only slightly beyond the drift in the first 10 ms and the thermal error stays well within 0 1% (10 mV) TL H 9065 - 14 TL H 9065 - 15 FIGURE 1 FIGURE 2 Physical Dimensions inches (millimeters) Steel TO-3 Metal Can Package (K STEEL) Order Number LM133K STEEL or LM333K STEEL NS Package Number K02A 7 LM133 LM333 3-Ampere Adjustable Negative Regulators Physical Dimensions inches (millimeters) (Continued) 3-Lead TO-220 Plastic Package (T) Order Number LM333T NS Package Number T03B This data sheet contains preliminary limits and design specifications Supplemental information will be published at a later date National Semiconductor reserves the right to make changes in the produicts contained in this document in order to improve design or performance and to supply the best possible products National also assumes no responsiblity for the use of any circuits described herein conveys no license under any patent or other right and makes no representations that the circuits are free from patent infringement Applications for any integrates circuits contained in this document are for illustration purposes only and National makes no representation or warranty that such applications will be suitable for the use specified without further testing or modification LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications |
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