It has built-in fault protection features to aid in protecting against output shorts, input/output overvoltages, and overtemperature conditions. The LT3581 is a multitpology switching regulator with a 3.3A/42V power switch. after power-up), the voltage across this capacitor is constant and approximately equal to V IN.Ī variation of the Ćuk converter circuit is the inverting charge pump circuit where inductor L2 is replaced by Schottky diode D3 shown below. The coupling or blocking capacitor receives energy from the input side of the circuit and transfers it to the output side of the circuit. It requires two inductors (these can be coupled or uncoupled and are typically matched in value) and a coupling capacitor (C5) between the input and output. & amp amp lt img src='' alt='4.5V to 80V Input, & amp amp ndash 12V Inverting Converter'& amp amp gt Its 6♚ quiescent current, programmable under voltage lockout, 100kHz to 500kHz switching frequency, and low output ripple make it ideal for high voltage, low standby current, negative output voltage needs. It features a wide 4.5V to 100V input voltage range and includes a 140V, 0.5A power switch. The high voltage, low quiescent current LT8331 is an example of a device that can be configured as a Ćuk converter. The Ćuk topology can typically be obtained from a device that also provides a boost, SEPIC or flyback topology. The objective is to show the advantages and trade-offs for the Cuk and inverting charge pump, followed by a brief discussion of the inverting topology, so you can make a more informed choice when selecting a negative output circuit topology that best suits your application. The following discussion highlights differences between inverting power supply architectures, with an emphasis on intuitive thought rather than in-depth power supply design and switching theory. What does each topology do? Why choose one topology over the other? The reasons vary, with some being more obvious than others. However, engineers often unknowingly refer to these topologies by the wrong name, adding confusion to an area that already is a bit confusing. The Ćuk converter (also referred to as the two inductor inverting converter), the inverting charge pump and the single inductor inverting converter (also referred to as the inverting buck-boost) all provide a negative output voltage from a positive input voltage. Differences Between the Ćuk Converter and the Inverting Charge Pump Converter

Cuk converter waveforms