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                  Home > Step Down Switching Regulators
                  UD05154 Datasheet
                    

                  1.5MHz, 1.5A, VFB=0.6V SYNCHRONOUS STEP-DOWN CONVERTER

                   

                   

                  DESCRIPTION

                   

                  UTC UD05154 devices are synchronous step-down converters
                  optimized for small solution size and high efficiency. The devices
                  integrate switches capable of delivering an output current up to
                  1.5A. The devices are based on an adaptive on time with valley
                  current mode control scheme. Typical operating frequency is
                  1.5MHz at medium to heavy loads. The devices are optimized to
                  achieve very low output voltage ripple even with small external
                  components and feature an excellent load transient response.
                  During a light load, the UD05154 automatically enter into Power
                  Save Mode at the lowest quiescent current (50μA typ) to maintain
                  high efficiency over the entire load current range. In shutdown, the
                  current consumption is reduced to 1μA. The UD05154 provide an
                  adjustable output voltage via an external resistor divider. The
                  output voltage start-up ramp is controlled by an internal soft start,
                  typically 300 μs. Power sequencing is possible by configuring the
                  Enable pin. Other features like over current protection and over
                  temperature protection are built in.

                   

                  FEATURES

                  * 2.7V to 5.5V Input Voltage Range
                  * 1.5MHz Typical Switching Frequency
                  * Output Current up to 1.5A
                  * Adaptive On-Time Current Control
                  * Power Save Mode for Light Load Efficiency

                  * 50μA Operating Quiescent Current
                  * Over Current Protection
                  * Internal Soft Startup of 300μs (Typ.)
                  * Adjustable Output Voltage
                  * Thermal Shutdown Protection

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