• Low R_DS(ON) for Internal Switches (top/bottom): 18/8mΩ
• Wide Input Voltage Range: 5.5-23V
• Integrated Bypass Switch: 1.5Ω
• Instant PWM Architecture to Achieve Fast Transient Responses
• Internal 0.8ms Soft-start Limits the Inrush Current
• Pseudo-constant Frequency: 600kHz.
• 10A Output Current Capability
• +/-1.5% Output Voltage Accuracy
• Power Good Indicator
• Output Discharge Function
• Output Current Limit Protection
• Output Under Voltage, Over Voltage Latch Off Protection
• Input UVLO
• Over Temperature Protection
• RoHS Compliant and Halogen Free
• Compact Package: QFN4×3-13L

The SY21247C develops a high efficiency synchronous step-down DC/DC regulator capable of delivering 10A current. The device integrates main switch and synchronous switch with very low R_DS(ON) to minimize the conduction loss. SY21247C also integrates a 100mA LDO with bypass switch.

The SY21247C operates over a wide input voltage range from 5.5V 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 600kHz under heavy load conditions to minimize the size of inductor and capacitor.