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                                      SY21305 -

                                      Features

                                      ·       Input Range: 3-16V

                                      ·       Programmable Pseudo-constant Frequency

                                      ·       Low RDS(ON)  Internal Switch

                                         Main FET: 16m?

                                         Rectified FET: 18m?

                                         Disconnection FET: 18m?

                                      ·       True Shutdown Function

                                      ·       Programmable Output Current Limit

                                      ·       Internal Soft-start Limits The Inrush Current

                                      ·       Input Voltage UVLO

                                      ·       Over Temperature Protection

                                      ·       Over Voltage Protection

                                      ·       Output Short Circuit Protection

                                      ·       Minimum ON Time: 100ns typical

                                      ·       Minimum OFF Time: 120ns typical

                                      ·       RoHS Compliant and Halogen Free

                                           ·       Compact Package:QFN4x4-18

                                      Typical Application

                                      Description

                                      SY21305 develops a high efficiency synchronous Boost regulator with programmable output current limit. The device adopts adaptive constant off time and current mode control. The integrated low RDS(ON) switches minimize the conduction loss.

                                       

                                      SY21305 features cycle by cycle peak current limit, output short circuit protection and true shutdown. The device also provides enable control and power good indicator for system sequence control. Low output voltage ripple and small external inductor and capacitor size are achieved with programmable pseudo-constant frequency.

                                      Applications

                                      ·       Power Bank

                                           ·       High Power AP

                                      湖北十一选五遗漏走势图

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