MA5201 MPOWER | Alldatasheet
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18V/2A High Efficiency Synchronous Step-Down DC/DC Converter GENERAL DESCRIPTION The MA5201 is a high efficiency synchronous step-down DC/DC converter series with 2A continuous output current supplied. A built-in Under Voltage Lockout (UVLO) circuit is provided to prevent start-up until the input voltage reaches to 4.6V. In addition, it features over-current protection and thermal shutdown. To improve the light load efficiency, it is designed as the power saving mode (PSM) to minimize the switching loss by reducing the switching frequency. The MA5201 is available in SOT23_6L package. FEATURES - Wide 4.6V to 18V Operating Input Range - Integrated 120/80mΩ Power MOSFET Switches - Adjustable Output Voltage from 0.6V to 12V - Power Saving Mode (PSM) during the light Load Operation - High Efficiency up to 95% - Adjustable Output Voltage from 0.6V to 12V - 2A Continuous Output Current - 500kHz Constant Frequency Operation - Current Mode Operation - Over-temperature and Over-current Protection - Input Under Voltage Lockout (UVLO) - 10μA Shutdown Current - RoHS Compliant (100% Green Available) APPLICATIONS - Data comm. DSL CPE Graphics Cards - Set-Top-Box, DVD - Servers/Networking - Telecomm Equipment - LCD Monitor and LCD TV
APPLICATION CIRCUIT VIN Cout 22uFx2 MLCC Input 4.6V ~ 18V CIN 10uF/25V MLCC EN FB Cup Option Output GND BST CBST=100nF SW VOUT=VFB × (1+R1/R2), VFB = 0.6V, PIN ASSIGNMENT The package of MA5201 is SOT23-6L; the pin assignment is given by: ( Top View ) FB SW BST GND ENVIN Name Description BST Boot-Strap Pin. Supply high side gate driver. Decouple this pin to LX pin with 0.1uF ceramic cap. GND Ground Pin. FB Output Feedback Pin. Connect this pin to the center point of the output resistor divider to program the output voltage: Vout=0.6*(1+R1/R2) EN Enable control. Pull high to turn on. Do not float. VIN Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap SW Inductor pin. Connect this pin to the switching node of inductor