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                  Home > Step Down Switching Regulators
                  UD05121 Datasheet
                   1.2A 1.5MHZ SYNCHRONOUS BUCK CONVERTER






                  The UTC UD05121 is a monolithic synchronous buck regulator

                  with a built in internal power MOSFET. It achieves 1.2A continuous

                  output current fix switching frequency with excellent load and line


                  Current mode operation provides fast transient response and

                  eases of loop stabilization.

                  Fault condition protection includes cycle-by-cycle current

                  limiting, output short circuit protection and thermal shutdown. In

                  shutdown mode the regulator draws less than 1μA of supply

                  current. Internal soft-start minimizes the inrush supply current at

                  initial startup.

                  The UTC UD05121 requires a minimum number of readily

                  available standard external components.




                  * 2.5V~5.5V input voltage range

                  * Up to 1.2A Output Current

                  * 300/200mΩ Internal Power MOSFET Switch

                  * Stable with Low ESR Output Ceramic Capacitors

                  * Up to 95% Efficiency

                  * Less than 1μA Shutdown Current

                  * 1.5Mhz Switching Frequency

                  * Thermal Shutdown Protection

                  * Current limit and short circuit protections.

                  * Output Adjustable from 0.6V to VIN

                  * Build-in soft start function

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