SY21264A Datasheet | Silergy

High Efficiency 6V, 4A, 1MHz Step-Up Regulator General Description The SY21264A high efficiency step-up regulator operates using current mode control, and can deliver 4A current over a wide input voltage range from 2V to 6V. It integrates an N-channel MOSFET with low 90mΩ RDS(ON) to minimize conduction loss. The 1MHz switching frequency and internal pensation reduce external inductor and capacitor sizes, and the built-in internal soft-start circuitry minimizes inrush current at startup. The SY21264A is available in a pact DFN3mmx3mm-10 package. Features - 2V to 6V Input Voltage Range - Up to 6V Output Voltage - Low RDS(ON) for Internal N-Channel MOSFET: 90mΩ Typical - 1MHz Switching Frequency - Minimum On-Time: 100ns Typical - Minimum Off-Time: 100ns Typical - Internal 4A Switch - Internal Soft-Start Limits Inrush Current - ±2% 0.6V Reference - Overtemperature Protection - Overcurrent Protection - Ro HS-pliant and Halogen-Free - pact DFN3mmx3mm-10 Package Applications - Single-Cell Li-ion Battery-Powered Applications - Portable Devices Typical Application VOUT: 5V VIN:3~4.2V L1 1µH 4,5 LX 7...