Vin (Min) (V)2Vin (Max) (V)40Vout (Min) (V)1Vout (Max) (V)36Iout (Max) (A)0.75Switching frequency (Min) (kHz)16Switching frequency (Max) (kHz)24FeaturesEnable, Over Current ProtectionDuty cycle (Max) (%)90TypeConverterOperating temperature range (C)-40 to 125RatingCatalogopen-in-newFind other Buck converters (integrated switch)
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.