The LTM®4612 is a complete, ultralow noise, high voltageinput and output, 5A switching mode DC/DC power supply.Included in the package are the switching controller, powerFETs, inductor and all support components. Operatingover an input voltage range of 5V to 36V, the LTM4612supports an output voltage range of 3.3V to 15V, set by asingle resistor. Only bulk input and output capacitors areneeded to fi nish the design.High switching frequency and an adaptive on-time currentmode architecture enables a very fast transient responseto line and load changes without sacrifi cing stability.The onboard input fi lter and noise cancellation circuitsachieve low noise coupling, thus effectively reducing theelectromagnetic interference (EMI)—see Figures 4 and 8.Furthermore, the DC/DC μModuleTM can be synchronizedwith an external clock for reducing undesirable frequencyharmonics and allows PolyPhase® operation for high loadcurrents.The LTM4612 is offered in a space saving and thermallyenhanced 15mm × 15mm × 2.8mm LGA package, whichenables utilization of unused space on the bottom of PCboards for high density point-of-load regulation. TheLTM4612 is Pb-free and RoHS compliant.
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