LM104/LM204/LM304 Negative Regulator General Description The LM104 series are precision voltage regulators which can be programmed by a single external resistor to supply any voltage from 40V down to zero while operating from a single unregulated supply. They can also provide 0.01-percent regulation in circuits using a separate, floating bias supply, where the output voltage is limited only by the breakdown of external pass transistors. Although designed primarily as linear, series regulators, the circuits can be used as switching regulators, current regulators or in a number of other control applications. Typical performance characteristics are: Y Subsurface zener reference Y 1 mV regulation no load to full load Y 0.01%/V line regulation Y 0.2 mV/V ripple rejection Y 0.3% temperature stability over military temperature range The LM104 series is the complement of the LM105 positive regulator, intended for systems requiring regulated negative voltages which have a common ground with the unregulated supply. By themselves, they can deliver output currents to 25 mA, but external transistors can be added to get any desired current. The output voltage is set by external resistors, and either constant or foldback current limiting is made available. The LM104 is specified for operation over the b55§ C to a 125§ C military temperature range. The LM204 is specified for operation over the b25§ C to a 85§ C temperature range. The LM304 is specified for operation from 0§ C to a 70§ C. Schematic Diagram TL/H/7754 – 1 C1995 National Semiconductor Corporation TL/H/7754 RRD-B30M115/Printed in U. S. A. LM104/LM204/LM304 Negative Regulator March 1989 Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 6) LM104/LM204 50V 50V 500 mW Input Voltage Input-Output Voltage Differential Power Dissipation (Note 1) Operating Temperature Range LM104 LM204 LM304 LM304 40V 40V 500 mW b 55§ C to a 125§ C b 25§ C to a 85§ C 0§ C to a 70§ C Storage Temperature Range Lead Temperature (Soldering, 10 sec.) b 65§ C to a 150§ C b 65§ C to a 150§ C 260§ C for plastic 300§ C for hermetic Electrical Characteristics Parameter LM104/LM204 Conditions Min Typ LM304 Max Min Typ Units Max Input Voltage Range b 50 b8 b 40 b8 V Output Voltage Range b 40 b 0.015 b 30 b 0.035 V 2.0 0.5 50 50 2.0 0.5 40 40 V V Output-Input Voltage Differential (Note 3) IO e 20 mA IO e 5 mA Load Regulation (Note 4) O s IO s 20 mA RSC e 15X 1 5 1 5 mV Line Regulation (Note 5) VOUT s b5V DVIN e 0.1 VIN 0.056 0.1 0.056 0.1 % Ripple Rejection C19 e 10 mF, f e 120 Hz VIN k b15V b 7V t VIN t b 15V 0.2 0.5 0,.5 1.0 0.2 0.5 0.5 1.0 mV/V mV/V 2.0 2.2 V/kX 0.3 1.0 % Output Voltage Scale Factor R2-3 e 2.4k Temperature Stability VO s b1V Output Noise Voltage 10 Hz s f s 10 kHz VO s b5V, C1-9 e 0 C1-9 e 10 mF 1.8 2.0 2.2 0.3 1.0 0.007 15 1.8 0.007 15 Standby Current Drain IL e 5 mA, VO e 0 VO e b30V VO e b40V 1.7 2.5 3.6 5.0 Long Term Stability VO s b1V 0.01 1.0 % mV 1.7 3.6 2.5 5.0 mA mA mA 0.01 1.0 % Note 1: The maximum junction temperature of the LM104 is 150§ C, while that of the LM204 is 125§ C and LM304 is 100§ C. For operating at elevated temperatures, devices in the H10C package must be derated based on a thermal resistance of 150§ C/W, junction to ambient, or 45§ C/W, junction to case. Note 2: These specifications apply for junction temperatures between b 55§ C and 150§ C (between b 25§ C and 100§ C for the LM204 and 0§ C to a 85§ C for the LM304) and for input and output voltages within the ranges given, unless otherwise specified. The load and line regulation specifications are for constant junction temperature. Temperature drift effects must be taken into account separately when the unit is operating under conditions of high dissipation. Note 3: When external booster transistors are used, the minimum output-input voltage differential is increased, in the worst case, by approximately 1V. Note 4: The output currents given, as well as the load regulation, can be increased by the addition of external transistors. The improvement factor will be roughly equal to the composite current gain of the added transistors. Note 5: With zero output, the dc line regulation is determined from the ripple rejection. Hence, with output voltages between 0V and b 5V, a dc output variation, determined from the ripple rejection, must be added to find the worst-case line regulation. Note 6: Refer to RETS104X drawing for military specifications for the LM104. 2 Typical Performance Characteristics Load Regulation Load Regulation Current Limiting Supply Voltage Rejection Supply Voltage Rejection With Preregulated Reference Supply Ripple Rejection Current Limit Sense Voltage Regulator Dropout Voltage Minimum Input Voltage Line Transient Response Load Transient Response Standby Current Drain TL/H/7754 – 7 3 Connection Diagram Metal Can Package TL/H/7754 – 2 Note: Pin 5 connected to case. Top View Order Number LM104H, LM204H or LM304H See NS Package H10C Typical Applications Operating with Separate Bias Supply Basic Regulator Circuit ² Solid Tantalum ² Solid Tantalum TL/H/7754 – 5 Trim R1 for exact scale factor. TL/H/7754 – 3 High Current Regulator ² Solid Tantalum Switching Regulator TL/H/7754 – 4 ² Solid Tantalum TL/H/7754 – 6 *60 turns Ý20 on Arnold Engineering A930157-2 Molybdenum Permalloy Core. 4 5 LM104/LM204/LM304 Negative Regulator Physical Dimensions inches (millimeters) Metal Can Package (H) Order Number LM104H, LM204H or LM304H NS Package Number H10C 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. 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