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                  Home > Step Down Switching Regulators
                  UD36061 Datasheet
                   0.6A, 36V, 2MHZ STEP-DOWN CONVERTER

                   

                   

                  DESCRIPTION

                   

                  The UTC  UD36061 is a high frequency (2MHz) step-down

                  switching regulator with integrated internal high-side high voltage

                  power MOSFET. It regulates input voltages from 3.3V to 36V down

                  to an output voltage as low as 0.8V, and supplies 0.6A highly

                  efficient output with current mode control for fast loop response.

                  In shutdown mode the supply current drops to 3μA, it allows

                  use in battery-powered applications.

                  High power conversion efficiency over a wide load range is

                  achieved by scaling down the switching frequency at light load

                  condition to reduce the switching and gate driving losses.

                  The converter uses internal N-Channel MOSFET switches to

                  step-down the input voltage to the regulated output voltage. Since

                  the high side MOSFET requires a gate voltage greater than the

                  input voltage, a boost capacitor connected between SW and BST is

                  needed to drive the high side gate. The boost capacitor is charged

                  from the internal 5V rail when SW is low.

                  Frequency fold-back helps prevent inductor current runaway

                  during start-up. Thermal shutdown provides reliable, fault-tolerant

                  operation.

                    

                  FEATURES

                   

                  * Wide 3.3V ~ 36V Operating Input Range

                  * 500m? Internal Power MOSFETs

                  * 230μA Operating Quiescent Current

                  * > 90% Efficiency

                  * 2MHz Fixed Switching Frequency

                  * Internally Compensated

                  * Internal Soft-Start

                  * Adjustable Output Voltage from 0.8V to 0.8×VIN

                  * Precision Current Limit Without Current Sensing Resistor

                  * Stable with Ceramic Output Capacitors

                  * 3μA Low Shutdown Supply Current

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