Product Summary

The LM2578AN 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 LM2578AN 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 750mA 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. The applications of the LM2578AN include Switching regulators in buck, boost, inverting, and single-ended transformer configurations, Motor speed control, Lamp flasher.

Parametrics

LM2578AN absolute maximum ratings: (1)Total Supply Voltage: 50V; (2)Collector Output to Ground: -0.3V to +50V; (3)Emitter Output to Ground: -1V to +50V; (4)Power Dissipation: Internally limited; (5)Output Current: 750 mA; (6)Storage Temperature: -65℃ to +150℃; (7)Lead Temperature(soldering, 10 seconds): 260℃; (8)Maximum Junction Temperature: 150℃; (9)ESD Tolerance: 2 kV.

Features

LM2578AN features: (1)Inverting and non-inverting feedback inputs; (2)1.0V reference at inputs; (3)Operates from supply voltages of 2V to 40V; (4)Output current up to 750 mA, saturation less than 0.9V; (5)Current limit and thermal shut down; (6)Duty cycle up to 90%.

Diagrams

LM2578AN block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM2578AN
LM2578AN
National Semiconductor (TI)
Switching Converters, Regulators & Controllers
Data Sheet
0-280: $1.45
280-520: $1.27
520-1000: $1.01
1000-2520: $0.96
LM2578AN/NOPB
LM2578AN/NOPB
National Semiconductor (TI)
Switching Converters, Regulators & Controllers
Data Sheet
0-1: $2.03
1-25: $1.63
25-100: $1.49
100-250: $1.34