LM2578A Datasheet | Texas Instruments

FEATURES - 2 Inverting and Non-Inverting Feedback Inputs - 1.0V Reference at Inputs - Operates from Supply Voltages of 2V to 40V - Output Current up to 750 m A, Saturation Less than 0.9V - Current Limit and Thermal Shut Down - Duty Cycle up to 90% APPLICATIONS - Switching Regulators in Buck, Boost, Inverting, and Single-Ended Transformer Configurations - Motor Speed Control - Lamp Flasher DESCRIPTION The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. The LM2578A features a unique parator input stage which not only has separate pins for both the inverting and non-inverting inputs, but also provides an internal 1.0V reference to each input, thereby simplifying circuit design and p.c. board layout. The output can switch up to 750 m A and has output pins for its collector and emitter to promote design flexibility. An external current limit terminal may be referenced to either the ground or the Vin terminal, depending upon the application. In addition, the LM2578A has an on board oscillator, which sets the switching frequency with a single external capacitor from <1 Hz to 100 k Hz (typical). The LM2578A is an improved version of the LM2578, offering higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages. Connection Diagram Figure 1. PDIP/SOIC Package See Package Number D0008A or P0008E Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright ©...