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                  Home > Step Down Switching Regulators
                  UD24121 Datasheet
                   1.2A, 24V, 1.4MHz STEP-DOWN CONVERTER






                  The UTC UD24121 is a monolithic step-down switching mode

                  converter with a built-in power MOSFET. It regulates input voltages

                  from 4.5V to 24V down to an output voltage as low as 0.81V, and

                  supplies up to 1.2A of load current.

                  Current mode operation provides fast transient response and

                  eases loop stabilization. Fault condition protection includes

                  cycle-by-cycle current limiting and thermal shutdown.

                  The UTC  UD24121 requires a minimum number of readily

                  available standard external components.




                  * Distributed Power Systems  

                  * Battery Charger  

                  * Pre-Regulator for Linear Regulators  

                  * WLED Drivers




                  * 1.2A Peak Output Current  

                  * 0.35? Internal Power MOSFET Switch  

                  * Stable with Low ESR Output Ceramic Capacitors  

                  * Up to 92% Efficiency  

                  * 0.1μA Shutdown Mode  

                  * Fixed 1.4MHz Frequency  

                  * Thermal Shutdown  

                  * Cycle-by-Cycle Over Current Protection  

                  * Wide 4.5V to 24V Operating Input Range  

                  * Output Adjustable from 0.81V to 15V   

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