The integrated regulator of voltage IR3870M SupIRBuck SupIRBuck is the innovational line of the POL( point-of-load) DC-DC single-channel voltage regulators with a broad inlet range, integrating the management microcircuit QFN 5х6 mm and the HEXFET field transistor within a low-profile frame. Due to the unique microcircuit layout, the SupIRBuck voltage regulators offer a simple, flexible, low-cost, compact and efficient POL converter solution. The company International Rectifier released into the market the new integrated voltage regulator of the series SupIRBuck IR3870M for notebooks and table computers, gaming consoles, user electronics (LC TV-sets, printer etc.), digital TV-games attachments, POL DC-DC converters of general use. IR3870M is a totally integrated DC-DC voltage regulator, convenient in usage and developed especially for the effective transformation of voltage at loads from small to complete. The IR3870M microcircuit is a hysteresis regulator with a fixed switching time, control of the 'dead time" zone and measurement of the outlet current on the keys. All the above integrated opportunities of the microcircuit promote the efficiency increase of the notebook supply bocks. The IR3870M regulator supplies the load of up to 10 amperes at the working temperature of 60°С and has the diode emulation for the effective functioning of the system on small loads. To increase the coefficient of efficiency in the range of average and total load the microcircuit is equipped with a pump for pumping the lock charge. Besides, the IR3870M is remarkable with its broad range of inlet voltages (3 - 26 volts) and the programmed level of outlet voltage between 0.5 and 12 volts, realized by the means of the exterior mounting of the resistors. Other peculiarities of the regulators include the shift launch, the precise source of the supporting tension of the 0.5 volts voltage, protection from increased and decreased inlet voltage, the enable inlet with the voltage control. The microcircuit allows constant control of the switch time, programming of the transformation frequency and the soft launching along with current protection.