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                                      SY21248 - High Efficiency Fast Response 8A Continuous, 16A Peak, 23V Input Buck

                                      Features

                                      ·       Low RDS(ON) for Internal Switches (Top/Bottom): 30/10m?

                                      ·       Wide Input Voltage Range: 4-23V

                                      ·       Output Voltage Range: 0.6~2.5V

                                      ·       External  Bypass Input

                                      ·       Instant PWM Architecture to Achieve Fast Transient Responses

                                      ·       Internal 400us Soft-Start Limits the Inrush Current

                                      ·       Pseudo-Constant Frequency: 500kHz.

                                      ·       8A Continuous/16A Peak Output Current Capability

                                      ·       ±1.0% 0.6V Reference

                                      ·       Programmable Valley Current Limit

                                      ·       Power Good Indicator

                                      ·       Output Discharge Function

                                      ·       Short Circuit Latch Off Protection

                                      ·       Over Voltage Latch Off  Protection

                                      ·       Thermal Shutdown

                                      ·       Input UVLO

                                      ·       Rohs Compliant and Halogen Free

                                      ·       Compact Package: QFN3x3-20

                                      Typical Application

                                      Description

                                      The SY21248 develops a high efficiency synchronous step-down DC-DC regulator capable of delivering 8A continuous, 16A peak current. The device integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. SY21248 also integrates a bypass switch which allows the IC to be powered by external DC source.


                                      The SY21248 operates over a wide input voltage range from 4V to 23V. The DC-DC regulator adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 500kHz under heavy load conditions to minimize the size of inductor and capacitor. SY21248 is optimized for lower than 2.5VOUT application

                                      Applications

                                      ·       LCD-TV/Net-TV/3DTV

                                      ·       Set Top Box

                                      ·       Notebook

                                      ·       High Power AP

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