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                  Home > Step Down Switching Regulators
                  UD18203 Datasheet
                    

                  2A, 18V SYNCHRONOUS FAST RESPONSE BUCK CONVERTER

                   

                   

                  DESCRIPTION

                   

                  The UTC UD18203 is a monolithic synchronous buck

                  regulator with built-in main switch and synchronous switch power

                  MOSFETs. It operates over a wide input voltage range from 4.5V

                  to 18V and achieves 2A continuous output current.

                  It adopts PWM architecture to achieve fast transient response

                  and high efficiency at light loads. It operates at pseudo-constant

                  frequency of 500kHz under heavy load conditions. Internal

                  soft-start minimizes the inrush supply current at initial startup.

                   

                  FEATURES

                   

                  * 4.5V~18V Input Voltage Range

                  * Up to 2A Output Current

                  * 140/130mΩ Internal Power MOSFET Switch

                  * PWM Architecture to Achieve Fast Transient Response

                  * Build-in soft start function

                  * 500kHz Switching Frequency

                  * Thermal Shutdown Protection

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