Features • Inverting and non-inverting feedback inputs • 1.0V reference at inputs • Operates from supply voltages of 2V to 40V • Output current up to 750 mA, saturation less than 0.9V • Current limit and thermal shut down • Duty cycle up to 90% 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 comparator 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 mA 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 kHz (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. Applications • Switching regulators in buck, boost, inverting, and single-ended transformer configurations • Motor speed control • Lamp flasher

Also Recommended LM25575▲ Emulated Current Mode 1MHz SIMPLE SWITCHER 1A Step Down Converter With Optimizer Tool In Webench LM2595▲ SIMPLE SWITCHER 150KHz 1A Step Down Converter LM2598▲ SIMPLE SWITCHER 150KHz 1A Step Down Converter With Soft Start And Error Flag LM2672▲ SIMPLE SWITCHER 260KHz 1A Step Down Converter With Soft Start, Sync Pin And Vin Feed Forward LM2675▲ SIMPLE SWITCHER 260KHz 1A Step Down Converter With Vin Feed Forward LM2578A▲ LM3578A With Extended Temperature Range -40 To 125C Temp range: LM2578A: -40 to +125C; LM3578A: 0 to 125C MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image Temp range: LM2578A: -40 to +125C; LM3578A: 0 to 125C	Connection Diagram *click for larger image

Datasheet

Title		Size	Date	Other Language
	LM2578A/LM3578A Switching Regulator	1378 Kbytes	7-Apr-05	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1066: Application Note 1066 Low Cost Boost Converters Using LM3578A	206 Kbytes	26-Sep-02
	AN-1055: AN-1055 Low-Cost Multiple Output Flyback Converter for I/O Cards	88 Kbytes	5-Jan-97
	AN-1889: Application Note 1889 How to Measure the Loop Transfer Function of Power Supplies	612 Kbytes	14-Oct-08

More Application Notes

Title		Size	Date	Other Language
	AN-1066: Application Note 1066 Low Cost Boost Converters Using LM3578A	206 Kbytes	26-Sep-02
	AN-1055: AN-1055 Low-Cost Multiple Output Flyback Converter for I/O Cards	88 Kbytes	5-Jan-97

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3578AM	SLM	0	44046	0	0	3532500	1	1002356520
LM3578AMX	SLM	0	44046	0	0	3532500	1	1002356520
LM3578AN	SLM	0	44046	0	0	3532500	1	1002356520

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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