LM3578A MWC National Semiconductor, LM3578A MWC Datasheet
LM3578A MWC
Related parts for LM3578A MWC
LM3578A MWC Summary of contents
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... Hz to 100 kHz (typical). The LM1578A is an improved version of the LM1578, offer- ing higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages. Functional Diagram © 1998 National Semiconductor Corporation DS008711 Features n Inverting and non-inverting feedback inputs n 1.0V reference at inputs n Operates from supply voltages 40V n Output current up to 750 mA, saturation less than 0 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Total Supply Voltage Collector Output to Ground Emitter Output to Ground (Note 2) Power Dissipation (Note 3) Output Current Storage Temperature Lead Temperature (soldering, 10 seconds) ...
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Electrical Characteristics These specifications apply for duty cycle 75%, unless otherwise specified. Values in standard typeface are for T operation over the specified operating junction temperature range. Symbol Parameter CURRENT LIMIT V Sense Voltage Referred to V ...
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Connection Diagram and Ordering Information Metal Can Top View Order Number LM1578AH/883 or SMD # 5962-8958602 See NS Package Number H08C Typical Performance Characteristics Oscillator Frequency Change with Temperature DS008711-32 Collector Saturation Voltage (Sinking Current, Emitter Grounded) DS008711-35 www.national.com Dual-In-Line ...
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Typical Performance Characteristics Current Limit Sense Voltage Drift with Temperature DS008711-38 Supply Current DS008711-41 Test Circuit * Parameter tests can be made using the test circuit shown. Select the desired V , collector voltage and duty cycle with in adjustable ...
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Test Circuit (Continued) ± Op amp supplies are 15V > DVM input resistance 100 M * LM1578 max duty cycle is 90% Definition of Terms Input Reference Voltage: The voltage (referred to ground) that must be applied to either ...
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Functional Description (Continued) and R2. Thus, both inputs to the comparator will have the po- tential of the 1.0V reference When one input, for ex- A ample the non-inverting input, is pulled V away from V current of ...
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Applications Information FIGURE 5. Current Limit Transient Suppressor, V Referred in C.L. SENSE VOLTAGE MULTIPLICATION When a larger sense resistor value is desired, the voltage di- vider network, consisting of R1 and R2, may be used. This effectively multiplies the ...
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Applications Information (Continued) FIGURE 10. Duty Cycle Adjustment REMOTE SHUTDOWN The LM1578A may be remotely shutdown by sinking a greater current from the non-inverting input than from the in- verting input. This may be accomplished by selecting resistor R3 to ...
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Typical Applications (Continued) FIGURE 14. Basic Buck Regulator Figure 15V to 5V buck regulator with an output cur- rent 350 mA. The circuit becomes discontinuous has 10 mV ...
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Typical Applications (Continued) 11 www.national.com ...
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Typical Applications (Continued) For a full line of standard inductor values, contact Pulse En- gineering (San Diego, Calif.) regarding their PE526XX se- ries Magnetics (Nashville, Tenn.). A more precise inductance value may be calculated for the ...
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Typical Applications (Continued) FIGURE 18. Basic Boost Regulator The circuit of Figure 19 converts a 5V supply into a 15V sup- ply with 150 mA of output current, a load regulation ( 140 mA), and ...
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Typical Applications (Continued) BUCK-BOOST REGULATOR The Buck-Boost Regulator, shown in Figure 22 , may step a voltage up or down, depending upon whether or not the de- sired output voltage is greater or less than the input voltage. In this ...
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Typical Applications (Continued 270 9V V 15V in = 12V C1 = 1820 220 µ 100 ripple = 50 kHz C4 ...
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Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM1578AH/883 or SMD # 5962-8958602 Metal Can Package (H) NS Package Number H08C Plastic Surface-Mount Package (M) Order Number LM3578AM NS Package Number M08A 17 www.national.com ...
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... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 ...