Oct 20

MIC261201YJL EV DC/DC SMPS : 4.5~28V in, 0.8 ~ 5.5V out DC/DC

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The MIC261201 DC-DC regulator operates over an input supply range of 4.5V to 28V, and provides a regulated output at up to 12A of output current. The output voltage is adjustable to 0.8V, with a typical accuracy of ±1%; the device operates at a switching frequency of 600kHz. The switching frequency remains fairly constant, with changes in the input voltage and output load. Micrel’s Hyper Speed Control™ architecture allows for ultra-fast transient response, while reducing the output cap …


Considering the efficiency (at each @ condition), this experimental model shows >90%, 24 Vin, 5V @ 2 ~ 12 A, >90%, 5 Vin, 3.3V @ 0.5 ~ 12 A, >93%, 12V in, 5V @ 0.5 ~ 12 A, and it seems sufficient. The standby current at maximum specification is 10 µA, with the typical is 5 µA. The MIC261201YJL EV prototype kit is made by Micrel Inc. The switching frequency is determined at 450 ~ 750 kHz. This MIC261201YJL EV circuit kit take the benefit of MIC261201YJL as the main IC. The quiescent current at maximum is specified as 1.5 mA, and the typical value is 730 µA. This DC/DC SMPS design is applicable for Computers, Printer, Plotter, Servers, Set-Top Boxes, Telecom. The default voltage out is 0.9 V, 1 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V. This experimental circuit features Current Foldback Protection, Hyper Speed Control(TM), Power Good Output, Pre-Biased Startup, Short Circuit Protection, Soft Start, Thermal Protection, Under Voltage Protection, Brown-Out. The specification for the output current: 12 A. Outputs and type are defined : 1 Non-Isolated. This design implements Step Down topology. The range of out-voltage is 0.8 ~ 5.5 V. Components number plus Extras for this design is 33 + 0.