SY8088

Application Notes: AN_SY8088 High Efficiency 1.5MHz, 1A Synchronous Step Down Regulator Preliminary Specification General Description SY8088 is a high efficiency 1.5MHz synchronous step down DC/DC regulator IC capable of delivering up to 1A output current. It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss. Ordering Information SY8088 □(□□)□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number Package Type Note SY8088AAC SOT23-5 1A Features Low RDS(ON) for internal switches (top/bottom) 260mΩ/170mΩ 2.5~5.5V input voltage range 40µA typical quiescent current High light load efficiency High switching frequency 1.5MHz minimizes the external components Internal soft-start limits the inrush current 100% dropout operation RoHS Compliant and Halogen Free Compact package: SOT23-5 Applications Portable Navigation Device Set Top Box USB Dongle Media Player Smart phone Typical Application Figure1. Schematic Diagram 95 90 85 80 75 70 1 Efficiency vs. Load Current VIN=3.3V,VOUT=1.8V VIN=4.2V,VOUT=1.8V VIN=5.0V,VOUT=1.8V 10 100 Load Current (mA) 1000 Figure2. Efficiency AN_SY8088 Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 1 Pinout (Top View) AN_SY8088 (SOT23-5) Top Mark: LDxyz (device code: LD, x=year code, y=week code, z= lot number code) Pin Name EN GND...