SY21248BRAC - High Efficiency Fast Response 8A, 23V Input Synchronous Step Down Regulator
Features
- Low RDS(ON) for Internal Switches (Top/Bottom): 22/11 mΩ
- Wide Input Voltage Range: 4-23V
- Integrated Bypass Switch: 1.5Ω
- Instant PWM Architecture to Achieve Fast Transient Responses
- Internal 1.2ms Soft-Start Limits The Inrush Current
- Pseudo-constant Frequency: 600kHz.
- 8A 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: QFN3x3-20
Typical Application

Description
The SY21248B develops a high efficiency synchronous step-down DC/DC regulator capable of delivering 8A current. The device integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. The SY21248B also integrates a 100mA LDO with bypass switch.
The SY21248B 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 600kHz under heavy load conditions to minimize the size of inductor and capacitor.
Applications
- LCD-TV/Net-TV/3DTV
- Set Top Box
- Notebook
- High Power AP