Press Center
                  Home About us Products Support Quality & Certification Career Contact us
                  • Power Management
                      Linear Regulators
                      Low Dropout Linear Regulators
                      DDR Termination Regulators
                      Shunt Reference Regulators
                      Step Down Switching Regulators
                      Switching Regulator
                      Step-Up DC-DC Converter
                      PWM Controller
                      White LED Driver
                      Supervisory Circuit
                      Voltage Detection and System R
                      USB Power Switch
                      Power Factor Control
                      Li-Battery Protection or Charg
                      FET Bias Controllers
                      Combo IC
                      Inverting DC-DC Converter
                  • Amplifier / Comparator
                      Audio Amplifiers
                      Operational Amplifier
                      Voltage Comparator
                  • Analog Switches
                      Video Signal Switch
                      Analog Multiplexers, Demultipl
                  • Hall ICs
                  • Special Application ICs
                      Motor Controller IC
                      Interface and Driver Circuit
                      Telecommunication Circuit
                      Melody IC
                      Alarm /Sound Generator IC
                      Remote Controller IC
                      Television Circuit
                      Leakage Current Detector
                      Automotive IC
                      A-D or D-A Converters
                      Radio and Cassette Recorder Ci
                      Mouse&Keyboard Controller
                      Transient Voltage Suppressors
                      Sense Monitor
                      Video Filter
                      ZCB snubber
                  • Logic
                  • TRANSISTORs
                  • MOSFETs
                      Power Mosfet
                  • TRIACs
                  • SCRs
                  • DIODEs
                  Home > Step Down Switching Regulators
                  UD18203 Datasheet






                  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.




                  * 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

                  About us  |  Products  |  Contact us
                  Copyright 2011 UTC All received