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 −1.5A over an output voltage range of −1.2V to −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. n n n n n n n n n n n n n Output voltage adjustable from −1.2V to −47V 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 P+ Product Enhancement tested Standard 3-lead transistor package Output short circuit protected Typical Applications Adjustable Negative Voltage Regulator DS009066-1 DS009066-25 †C1 = 1 µF solid tantalum or 10 µF aluminum electrolytic required for stability. 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. *C2 = 1 µF solid tantalum is required only if regulator is more than 4" from power-supply filter capacitor. © 1999 National Semiconductor Corporation DS009066 www.national.com LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) May 1999 Absolute Maximum Ratings (Note 1) Operating Junction Temperature Range LM137HV LM337HV Storage Temperature Lead Temperature (Soldering, 10 sec.) 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 4) Power Dissipation Input — Output Voltage Differential Internally limited 50V −55˚C to +150˚C 0˚C to +125˚C −65˚C to +150˚C 300˚ Electrical Characteristics (Note 2) Parameter Conditions LM137HV Min Line Regulation TJ = 25˚C, 3V ≤ |VIN−VOUT| ≤ 50V, Load Regulation (Note 3) IL = 10 mA TJ = 25˚C, 10 mA ≤ IOUT ≤ IMAX TJ = 25˚C, 10 ms Pulse Thermal Regulation Adjustment Pin Current Adjustment Pin Current Change Reference Voltage LM337HV Typ Max 0.01 0.02 Min Units Typ Max 0.01 0.04 %/V 0.3 0.5 0.3 1.0 % 0.002 0.02 0.003 0.04 %/W 65 100 65 100 µA 10 mA ≤ IL ≤ IMAX 2 5 2 5 µA 3.0V ≤ |VIN−VOUT| ≤ 50V, TJ = 25˚ 4 6 3 6 µA TJ = 25˚C, (Note 4) −1.225 −1.250 −1.275 −1.213 −1.250 −1.287 V 3V ≤ |VIN−VOUT| ≤ 50V, (Note 4) −1.200 −1.250 −1.300 −1.200 −1.250 −1.300 V 10 mA ≤ IOUT ≤ IMAX, P≤ PMAX Line Regulation 3V ≤ |VIN−VOUT| ≤ 50V, (Note 3) IL = 10 mA 0.02 0.05 1 0.02 0.07 0.3 1.5 %/V Load Regulation 10 mA ≤ IOUT ≤ IMAX, (Note 3) 0.3 Temperature Stability TMIN ≤ Tj ≤ TMAX 0.6 Minimum Load Current |VIN−VOUT| ≤ 50V 2.5 5 2.5 10 mA |VIN−VOUT| ≤ 10V 1.2 3 1.5 6 mA Current Limit % % 0.6 |VIN−VOUT| ≤ 13V K Package 1.5 2.2 3.2 1.5 2.2 3.5 A H Package 0.5 0.8 1.6 0.5 0.8 1.8 A |VIN−VOUT| = 50V RMS Output Noise, % of VOUT Ripple Rejection Ratio K Package 0.2 0.4 0.8 0.1 0.4 0.8 A H Package TJ = 25˚C, 10 Hz ≤ f ≤ 10 kHz 0.1 0.17 0.5 0.050 0.17 0.5 A 0.003 VOUT = −10V, f = 120 Hz CADJ = 10 µF 60 66 77 66 0.003 % 60 dB 77 dB Long-Term Stability TA = 125˚C, 1000 Hours 0.3 1 0.3 1 % Thermal Resistance, Junction H Package 12 15 12 15 ˚C/W to Case K Package 2.3 3 2.3 3 ˚C/W Thermal Resistance, Junction to Ambient H Package 140 140 ˚C/W K Package 35 35 ˚C/W 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. Note 2: Unless otherwise specified, these specifications apply: −55˚C ≤ Tj ≤ +150˚C for the LM137HV, 0˚C ≤ Tj ≤ +125˚C for the LM337HV; VIN−VOUT = 5V; and IOUT = 0.1A for the TO-39 package and IOUT = 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 3: 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 1⁄8" below the base of the TO-3 and TO-39 packages. Note 4: Refer to RETS137HVH drawing for LM137HVH or RETS137HVK for LM137HVK military specifications. www.national.com 2 (Continued) DS009066-2 Electrical Characteristics (Note 2) 3 www.national.com 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 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. In Figure 1, a typical LM137HV’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 x 10W = 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). DS009066-3 LM137HV, VOUT = −10V VIN−VOUT = −40V IL = 0A→0.25A→0A Vertical sensitivity, 5 mV/div FIGURE 1. DS009066-4 LM137HV, VOUT = −10V VIN−VOUT = −40V IL = 0A→0.25A→0A Horizontal sensitivity, 20 ms/div FIGURE 2. Connection Diagram See Physical Dimensions section for further information) TO-3 Metal Can Package TO-39 Metal Can Package DS009066-6 DS009066-5 Bottom View Order Number LM137HVK/883, LM137HVK-QMLV, or SMD #7703404 See NS Package Number K02C Order Number LM337HVK STEEL See NS Package Number K02A www.national.com Bottom View Order Number LM137HVH/883, LM137HVH-QMLV, SMD #7703404 or LML337HVH See NS Package Number H03A 4 Typical Applications Adjustable High Voltage Regulator DS009066-7 Full output current not available at high input-output voltages *The 10 µF capacitors are optional to improve ripple rejection Current Regulator Adjustable Current Regulator DS009066-8 DS009066-9 Negative Regulator with Protection Diodes High Stability −40V Regulator DS009066-11 *Use resistors with good tracking TC < 25 ppm/˚C DS009066-10 *When CL is larger than 20 µF, D1 protects the LM137HV in case the input supply is shorted **When C2 is larger than 10 µF and −VOUT is larger than −25V, D2 protects the LM137HV is case the output is shorted 5 www.national.com Typical Performance Characteristics (H and K-STEEL Package) Current Limit Load Regulation Adjustment Current Dropout Voltage Temperature Stability DS009066-16 Ripple Rejection Minimum Operating Current DS009066-17 Ripple Rejection DS009066-18 Ripple Rejection DS009066-19 www.national.com DS009066-15 DS009066-14 DS009066-13 DS009066-20 6 DS009066-21 Typical Performance Characteristics (H and K-STEEL Package) (Continued) Line Transient Response Output Impedance Load Transient Response DS009066-23 DS009066-22 7 DS009066-24 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM137HVH/883, LM137HVH-QMLV, or LM337HVH NS Package Number H03A www.national.com 8 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Metal Can Package (K) Order Number LM337HVK STEEL NS Package Number K02A Metal Can Package (K) Mil-Aero Products Order Number LM137HVK/883, LM137HVK-QMLV, or SMD #7703404 NS Package Number K02C 9 www.national.com LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) Notes 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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. 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