Part # LM2578A datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2578A LM3578A Switching Regulator

Part Details:

LM2578A/LM3578A February 2005 LM2578A/LM3578ASwitching RegulatorGeneral Description Features The LM2578A is a switching regulator which can easily be n Inverting and non-inverting feedback inputs set up for such DC-to-DC voltage conversion circuits as the n 1.0V reference at inputs Switching buck, boost, and inverting configurations. The LM2578A fea- n Operates from supply voltages of 2V to 40V tures a unique comparator input stage which not only has n Output current up to 750 mA, saturation less than 0.9V separate pins for both the inverting and non-inverting inputs, n Current limit and thermal shut down but also provides an internal 1.0V reference to each input, n Duty cycle up to 90% thereby simplifying circuit design and p.c. board layout. Theoutput can switch up to 750 mA and has output pins for itscollector and emitter to promote design flexibility. An external Applications Regulator current limit terminal may be referenced to either the ground n Switching regulators in buck, boost, inverting, and or the V terminal, depending upon the application. In addi- single-ended transformer configurations in tion, the LM2578A has an on board oscillator, which sets the n Motor speed control switching frequency with a single external capacitor from <1 n Lamp flasher Hz to 100 kHz (typical). The LM2578A is an improved version of the LM2578, offer-ing higher maximum ratings for the total supply voltage andoutput transistor emitter and collector voltages. Connection Diagram and Ordering Information Dual-In-Line Package 00871129 Order Number LM3578AM, LM2578AN or LM3578AN See NS Package Number M08A or N08E © 2005 National Semiconductor Corporation DS008711 Functional Diagram LM2578A/LM3578A 00871101 2 LM2578A/LM3578A Absolute Maximum Ratings (Note 1) ESD Tolerance (Note 4) 2 kV If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/ Operating Ratings Distributors for availability and specifications. Ambient Temperature Range Total Supply Voltage

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LM2578A.pdf Datasheet