LM137JAN LM137JAN 3-Terminal Adjustable Negative Regulators Literature Number: SNVS332A LM137JAN 3-Terminal Adjustable Negative Regulators General Description Features The LM137 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −37V to −1.2V. 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 LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads. The LM137 serves a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137 are ideal complements to the LM117 adjustable positive regulators. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Output voltage adjustable from −37V to −1.2V 1.5A output current guaranteed, −55°C to +150°C Line regulation typically 0.01%/V Load regulation typically 0.3% Excellent thermal regulation, 0.002%/W 77 dB ripple rejection Excellent rejection of thermal transients 50 ppm/°C temperature coefficient Temperature-independent current limit Internal thermal overload protection Standard 3-lead transistor package Output is short circuit protected LM137 Series Packages and Power Capability Device Package Rated Power Dissipation Design Load Current LM137 TO-3 (K) TO-39 (H) 20W 2W 1.5A 0.5A Ordering Information NS Part Number JAN Part Number NS Package Number Package Description JL137BXA JM38510/11803BXA H03A 3LD T0–39 Metal Can JL137SXA JM38510/11803SXA H03A 3LD T0–39 Metal Can JL137SYA JM38510/11804SYA K02C 2LD Low Profile T0–3 Metal Can © 2011 National Semiconductor Corporation 201297 www.national.com LM137JAN 3-Terminal Adjustable Negative Regulators December 8, 2010 LM137JAN Connection Diagrams TO-3 Metal Can Package TO-39 Metal Can Package 20129706 Case Is Input Bottom View See NS Package Number H03A 20129705 Case is Input Bottom View See NS Package Number K02C Typical Applications Adjustable Negative Voltage Regulator 20129701 Full output current not available at high input-output voltages †C1 = 1 μF solid tantalum or 10 μF aluminum electrolytic required for stability *C2 = 1 μF solid tantalum is required only if regulator is more than 4″ from power-supply filter capacitor Output capacitors in the range of 1 μF to 1000 μF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients www.national.com 2 LM137JAN Absolute Maximum Ratings (Note 1) Power Dissipation (Note 2) Input-Output Voltage Differential Operating Ambient Temperature Range Internally Limited 40V −55°C ≤ TA ≤ +125°C −55°C ≤ TJ ≤ +150°C +150°C Operating Junction Temperature Range Maximum Junction Temperature Storage Temperature −65°C ≤ TA ≤ +150°C 300°C −41.25V Lead Temperature (Soldering, 10 sec.) Minimum Input Voltage Maximum Power Dissipation (@25°C) T0–3 T0–39 Thermal Resistance 28 Watts 2.5Watts θJA T0–3 Metal Can (Still Air) T0–3 Metal Can (500LF/Min Air Flow) T0–39 Metal Can (Still Air @ 0.5W) T0–39 Metal Can (500LF/Min Air Flow @ 0.5W) 40°C/W 14°C/W 174°C/W 64°C/W θJC T0–3 T0–39 Metal Can (@ 1.0W) Package Weight (typical) T0–3 T0–39 Metal Can ESD Rating (Note 3) 4°C/W 15°C/W 12,750mg 955mg 4K Volts Recommended Operating Conditions −55°C ≤ TA ≤ +125°C TA Input Voltage Range −41.25V to −4.25V Quality Conformance Inspection Mil-Std-883, Method 5005 — Group A Subgroup Description Temp (°C) 1 Static tests at +25 2 Static tests at +125 3 Static tests at -55 4 Dynamic tests at +25 5 Dynamic tests at +125 6 Dynamic tests at -55 7 Functional tests at +25 8A Functional tests at +125 8B Functional tests at -55 9 Switching tests at +25 10 Switching tests at +125 11 Switching tests at -55 3 www.national.com LM137JAN LM137H Electrical Characteristics DC Parameters Symbol Parameter Conditions Notes VIN = -4.25V, IL = 5mA VIN = -4.25V, IL = 500mA VOUT VR Load VRth IAdj Load Regulation Thermal Regulation Adjust Pin Current ΔIAdj / VLine Adjust Pin Current Change vs. Line Voltage ΔIAdj / ILoad Adjust Pin Current Change vs. Load Current IOS Output Short Circuit Current VOUT Recovery IQ Output Voltage Recovery After Output Short Circuit Current Minimum Load Current -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 2, 3 -1.2 V -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 VIN = -41.25V to -4.25V, IL = 5mA -9.0 9.0 mV 1 -23 23 mV 2, 3 VIN = -6.25V, IL = 5mA to 500mA -12 12 mV 1 -24 24 mV 2, 3 VIN = -41.25V, IL = 5mA to 50mA -6.0 6.0 mV 1 -12 12 mV 2, 3 VIN = -6.25V, IL = 5mA to 200mA -6.0 6.0 mV 1 -12 12 mV 2, 3 VIN = -14.6V, IL = 500mA -5.0 5.0 mV 1 VIN = -4.25V, IL = 5mA 25 100 µA 1, 2, 3 VIN = -41.25V, IL = 5mA 25 100 µA 1, 2, 3 VIN = -41.25V to -4.25V, IL = 5mA -5.0 5.0 µA 1, 2, 3 VIN = -6.25V, IL = 5mA to 500mA -5.0 5.0 µA 1, 2, 3 VIN = -4.25V 0.5 1.8 A 1, 2, 3 1, 2, 3 VIN = -40V 0.05 0.5 A -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 VIN = -4.25V 0.2 3.0 mA 1, 2, 3 VIN = -14.25V 0.2 3.0 mA 1, 2, 3 VIN = -41.25V 1.0 5.0 mA 1, 2, 3 -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -1.3 -1.2 V VIN = -4.25V VIN = -40V VStart Voltage Start-up VIN = -4.25V, IL = 500mA VOUT Output Voltage VIN = -6.25V, IL = 5mA (No Subgroup) www.national.com Units -1.3 VIN = -41.25V, IL = 50mA Line Regulation Max -1.275 Output Voltage VIN = -41.25V, IL = 5mA VR Line Subgroups Min 4 (Note 4) Symbol ΔVIN / ΔVOUT VNO ΔVOUT / ΔVIN 4 VIN = -6.25V, IL = 125mA, eI = 1VRMS at 2400Hz Output Noise Voltage VIN = -6.25V, IL = 50mA 120 µVRMS Line Transient Response VIN = -6.25V, VPulse = -1V, IL = 50mA 80 mV/V 7 60 mV 7 Min Max Units Subgroups VIN = -4.25V, IL = 5mA -0.01 0.01 V 1 VIN = -4.25V, IL = 500mA -0.01 0.01 V 1 VIN = -41.25V, IL = 5mA -0.01 0.01 V 1 VIN = -41.25V, IL = 50mA -0.01 0.01 V 1 VIN = 41.25V to -4.25V, IL = 5mA -4.0 4.0 mV 1 VIN = -4.25V, IL = 5mA -10 10 µA 1 VIN = -41.25V, IL = 5mA -10 10 µA 1 DC Parameters: ΔIL = 200mA Max dB Ripple Rejection VIN = -6.25V, IL = 50mA, Min Subgroups Conditions ΔVOUT / ΔIL Load Transient Response Notes Units Parameter 48 (Note 5) Drift Values Delta calculations performed on JAN S devices at group B, subgroup 5 only. Symbol VOUT VR Line IAdj Parameter Output Voltage Line Regulation Adjust Pin Current Conditions Notes 5 www.national.com LM137JAN AC Parameters LM137JAN LM137K Electrical Characteristics DC Parameters: Symbol Parameter Conditions Notes VIN = -4.25V, IL = 5mA VIN = -4.25V, IL = 1.5A VOUT Output Voltage VIN = -41.25V, IL = 5mA VIN = -41.25V, IL = 200mA VR Line Line Regulation -41.25V ≤ VIN ≤ -4.25V, IL = 5mA Load Regulation VRth Thermal Regulation IAdj Adjust Pin Current ΔIAdj / VLine Adjust Pin Current Change vs. Line Voltage ΔIAdj / ILoad Adjust Pin Current Change vs. Load Current IOS Output Short Circuit Current VOUT Recovery IQ VOUT Output Voltage -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 2, 3 -1.3 -1.2 V -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -9.0 9.0 mV 1 2, 3 23 mV mV 1 -12 12 mV 2, 3 VIN = -41.25V, IL = 5mA to 200mA -6.0 6.0 mV 1 -12 12 mV 2, 3 VIN = -14.6V, IL = 1.5A -5.0 5.0 mV 1 VIN = -4.25V, IL = 5mA 25 100 µA 1, 2, 3 VIN = -41.25V, IL = 5mA 25 100 µA 1, 2, 3 -41.25V ≤ VIN ≤ -4.25, IL = 5mA -5.0 5.0 µA 1, 2, 3 VIN = -6.25V, IL = 5mA to 1.5A -5.0 5.0 µA 1, 2, 3 VIN = -4.25V 1.5 3.5 A 1, 2, 3 1, 2, 3 VIN = -40V 0.2 1.0 A -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 -1.275 -1.225 V 1 -1.3 -1.2 V 2, 3 VIN = -4.25V 0.2 3.0 mA 1, 2, 3 VIN = -14.25V 0.2 3.0 mA 1, 2, 3 VIN = -41.25V 1.0 5.0 mA 1, 2, 3 VIN = 4.25V, IL = 1.5A -1.275 -1.225 V 1 VIN = 4.25V, IL = 1.5A -1.3 -1.2 V 2, 3 -1.3 -1.2 V VIN = -40V Voltage Start-up -1.275 6.0 Output Voltage Recovery VStart Units -23 VIN = -4.25V Minimum Load Current Max -6.0 VIN = -6.25V, IL = 5mA to 1.5A VR Load Subgroups Min VIN = -6.25V, IL = 5mA No Subgroup (Note 4) AC Parameters: 4 ΔVIN / Ripple Rejection VIN = -6.25V, IL = 500mA, eI = 1VRMS at 2400Hz VNO Output Noise Voltage VIN = -6.25V, IL = 100mA 120 µVRMS ΔVOUT / Line Transient Response ΔVIN VIN = -6.25V, IL = 100mA, VPulse = -1V 80 mV/V 7 ΔVOUT / ΔIL Load Transient Response VIN = -6.25V, IL = 100mA, 60 mV 7 www.national.com 6 Max dB Conditions ΔIL = 400mA Min Subgroups Parameter ΔVOUT Notes Units Symbol 50 (Note 6) Drift Values Delta calculations performed on JAN S devices at group B, subgroup 5 only. Min Max Units Subgroups VIN = -4.25V, IL = 5mA -0.01 0.01 V 1 Line Regulation VIN = -41.25V to -4.25, IL = 5mA -4.0 4.0 mV 1 Adjust Pin Current VIN = -41.25V, IL = 5mA -10 10 µA 1 Symbol Parameter Conditions VOUT Output Voltage VR line IAdj Notes Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (package junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax = (TJmax - TA)/ θJA or the number given in the Absolute Maximum Ratings, whichever is lower. Note 3: Human body model, 100pF discharged through 1.5KΩ Note 4: Tested at +125°C ; correlated to +150°C Note 5: Slash sheet limit of 0.3mV/mA is equivalent to 60mV Note 6: Slash sheet limit of 0.15mV/mA is equivalent to 60mV 7 www.national.com LM137JAN DC Parameters: LM137JAN Schematic Diagram 20129702 www.national.com 8 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 power dissipation is large. Thermal regulation is the effect of these temperature gradients on output voltage (in percentage output change) per Watt of power 20129703 LM137, VOUT = −10V VIN − VOUT = −40V IIL = 0A → 0.25A → 0A Vertical sensitivity, 5 mV/div FIGURE 1. In Figure 1, a typical LM137's output drifts only 3 mV (or 0.03% of VOUT = −10V) when a 10W pulse is applied for 10 ms. This performance is thus well inside the specification limit of 0.02%/W × 10W = 0.2% max. When the 10W pulse is ended, the thermal regulation again shows a 3 mV step as the LM137 chip cools off. Note that the load regulation error of about 8 mV (0.08%) is additional to the thermal regulation error. In Figure 2, when the 10W 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). 20129704 LM137, VOUT = −10V VIN − VOUT = −40V IL = 0A → 0.25A → 0A Horizontal sensitivity, 20 ms/div FIGURE 2. 9 www.national.com LM137JAN 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 LM137's specification is 0.02%/W, max. Thermal Regulation LM137JAN −5.2V Regulator with Electronic Shutdown* Typical Applications Adjustable Lab Voltage Regulator 20129710 *Minimum output ″ −1.3V when control input is low Adjustable Current Regulator 20129709 Full output current not available at high input-output voltages *The 10 μF capacitors are optional to improve ripple rejection Current Regulator 20129712 High Stability −10V Regulator 20129711 Negative Regulator with Protection Diodes 20129714 20129713 *When CL is larger than 20 μF, D1 protects the LM137 in case the input supply is shorted **When C2 is larger than 10 μF and −VOUT is larger than −25V, D2 protects the LM137 in case the output is shorted www.national.com 10 LM137JAN Typical Performance Characteristics (H & K Packages) Load Regulation Current Limit 20129716 20129717 Adjustment Current Dropout Voltage 20129718 20129719 Temperature Stability Minimum Operating Current 20129720 20129721 11 www.national.com LM137JAN Ripple Rejection Ripple Rejection 20129722 20129723 Ripple Rejection Output Impedance 20129724 20129725 Line Transient Response Load Transient Response 20129726 www.national.com 20129727 12 Date Released 12/08/2010 Revision A Section Changes New Release, Corporate format 13 2 MDS data sheets converted into one Corp. data sheet format. MJLM137-H Rev. 0A0, MJLM137-K Rev. 0A0. MDS data sheets will be archived. www.national.com LM137JAN Revision History LM137JAN Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) NS Package Number H03A Metal Can Package (K) NS Package Number K02C www.national.com 14 LM137JAN Notes 15 www.national.com LM137JAN 3-Terminal Adjustable Negative Regulators Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH® Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise® Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagic™ www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise® Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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