LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) General Description Features The LM137HV/LM337HV are adjustable 3-terminal negative voltage regulators capable of supplying in excess of b 1.5A over an output voltage range of b 1.2V to b 47V. 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 LM137HV series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads. The LM137HV/LM337HV serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137HV/LM337HV are ideal complements to the LM117HV/LM317HV adjustable positive regulators. Y Y Y Y Y Y Y Y Y Y Y Y Y Output voltage adjustable from b1.2V to b47V 1.5A output current guaranteed, b55 C to a 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 P a Product Enhancement tested Standard 3-lead transistor package Output short circuit protected Typical Applications Adjustable Negative Voltage Regulator TL/H/9066 - 1 b VOUT e b 1.25V #1 a R2 120X J a b IAdj (R2) ( C1 e 1 mF solid tantalum or 10 mF aluminum electrolytic required for stability. Output capacitors in the range of 1 mF to 1000 mF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients. *C2 e 1 mF solid tantalum is required only if regulator is more than 4x from power-supply filter capacitor. C1995 National Semiconductor Corporation TL/H/9066 RRD-B30M115/Printed in U. S. A. LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) January 1995 Absolute Maximum Ratings Operating Junction Temperature Range b 55 C to a 150 C LM137HV LM337HV 0 C to a 125 C b 65 C to a 150 C Storage Temperature Lead Temperature (Soldering, 10 sec.) 300 ESD rating is to be determined. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 3) Power Dissipation Internally limited InputOutput Voltage Differential 50V Electrical Characteristics (Note 1) Parameter LM137HV Conditions Min LM337HV Typ Max Min Units Typ Max Line Regulation TJ e 25 C, 3V s lVINbVOUTl s 50V, (Note 2) IL e 10 mA 0.01 0.02 0.01 0.04 %/V Load Regulation TJ e 25 C, 10 mA s IOUT s IMAX 0.3 0.5 0.3 1.0 % Thermal Regulation TJ e 25 C, 10 ms Pulse %/W 0.002 0.02 0.003 0.04 Adjustment Pin Current 65 100 65 100 mA Adjustment Pin Current Change 10 mA s IL s IMAX 3.0V s lVINbVOUTl s 50V, TJ e 25 2 5 2 5 mA 4 6 3 6 mA Reference Voltage TJ e 25 C, (Note 3) 3V s lVINbVOUTl s 50V, (Note 3) 10 mA s IOUT s IMAX, Ps PMAX Line Regulation 3V s lVINbVOUTl s 50V, (Note 2) IL e 10 mA Load Regulation b 1.225 b 1.250 b 1.275 b 1.213 b 1.250 b 1.287 b 1.200 b 1.250 b 1.300 b 1.200 b 1.250 b 1.300 0.02 0.05 10 mA s IOUT s IMAX, (Note 2) 0.3 1 Temperature Stability TMIN s Tj s TMAX 0.6 Minimum Load Current lVINbVOUTl s 50V lVINbVOUTl s 10V lVINbVOUTl s 13V 2.5 1.2 5 3 1.5 0.5 2.2 0.8 3.2 1.6 0.2 0.1 0.4 0.17 0.8 0.5 Current Limit K Package H Package lVINbVOUTl e 50V K Package H Package RMS Output Noise, % of VOUT TJ e 25 C, 10 Hz s f s 10 kHz 0.02 0.07 0.3 1.5 0.6 V V %/V % % 2.5 1.5 10 6 mA mA 1.5 0.5 2.2 0.8 3.5 1.8 A A 0.1 0.050 0.4 0.17 0.8 0.5 A A 0.003 0.003 % 60 77 60 77 dB dB Ripple Rejection Ratio VOUT e b10V, f e 120 Hz CADJ e 10 mF Long-Term Stability TA e 125 C, 1000 Hours 0.3 1 0.3 1 % Thermal Resistance, Junction to Case H Package K Package 12 2.3 15 3 12 2.3 15 3 C/W C/W Thermal Resistance, Junction to Ambient H Package K Package 140 35 66 66 140 35 C/W C/W Note 1: Unless otherwise specified, these specifications apply: b 55 C s Tj s a 150 C for the LM137HV, 0 C s Tj s a 125 C for the LM337HV; VIN b VOUT e 5V; and IOUT e 0.1A for the TO-39 package and IOUT e 0.5A for the TO-3 package. Although power dissipation is internally limited, these specifications are applicable for power dissipations of 2W for the TO-39 and 20W for the TO-3. IMAX is 1.5A for the TO-3 package and 0.2A for the TO-39 package. Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulations. Load regulation is measured on the output pin at a point (/8x below the base of the TO-3 and TO-39 packages. Note 3: Refer to RETS137HVH drawing for LM137HVH or RETS137HVK for LM137HVK military specifications. 2 TL/H/9066 - 2 Schematic Diagram 3 Thermal Regulation In Figure 1, a typical LM137HV's output drifts only 3 mV (or 0.03% of VOUT e b10V) when a 10W pulse is applied for 10 ms. This performance is thus well inside the specification limit of 0.02%/W x 10W e 0.2% max. When the 10W pulse is ended, the thermal regulation again shows a 3 mV step as the LM137HV 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). 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 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 LM137HV's specification is 0.02%/W, max. TL/H/9066-3 TL/H/9066 - 4 LM137HV, VOUT e b 10V VIN b VOUT e b 40V IL e 0A LM137HV, VOUT e b 10V VIN b VOUT e b 40V x 0.25A x 0A IL e 0A Vertical sensitivity, 5 mV/div x 0.25A x 0A Horizontal sensitivity, 20 ms/div FIGURE 1 FIGURE 2 Connection Diagram (See Physical Dimensions section for further information) TO-39 Metal Can Package TO-3 Metal Can Package TL/H/9066 - 6 Bottom View TL/H/9066-5 Order Number LM137HVH/883, SMD Y7703404 or LML337HVH See NS Package Number H03A Bottom View Order Number LM137HVK/883 or SMD Y7703404 See NS Package Number K02C Order Number LM337HVK STEEL See NS Package Number K02A 4 Typical Applications (Continued) Adjustable High Voltage Regulator TL/H/9066 - 7 Full output current not available at high input-output voltages *The 10 mF capacitors are optional to improve ripple rejection Current Regulator Adjustable Current Regulator VREF IOUT e R1 * 0.8X s R1 s 120X IOUT e TL/H/9066 - 8 # R1 J 1.5V g 15% adjustable TL/H/9066 - 9 Negative Regulator with Protection Diodes High Stability b40V Regulator TL/H/9066 - 11 * Use resistors with good tracking TC k 25 ppm/ C TL/H/9066 - 10 *When CL is larger than 20 mF, D1 protects the LM137HV 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 LM137HV is case the output is shorted 5 Typical Performance Characteristics (H and K-STEEL Package) Load Regulation Current Limit Adjustment Current Dropout Voltage Temperature Stability Minimum Operating Current Ripple Rejection Ripple Rejection Ripple Rejection Output Impedance Line Transient Response Load Transient Response TL/H/9066 - 12 6 Physical Dimensions inches (millimeters) Metal Can Package (H) Order Number LM137HVH/883 or LM337HVH NS Package Number H03A Metal Can Package (K) Order Number LM337HVK STEEL NS Package Number K02A 7 LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) Physical Dimensions inches (millimeters) (Continued) Metal Can Package (K) Mil-Aero Products Order Number LM137HVK/883 or SMD Y7703404 NS Package Number K02C 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. 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