SC171

SC171 POWER MANAGEMENT 1A EcoSpeedTM Synchronous Step-Down Regulator with Optional Ultrasonic Power Save Features  VIN: 3V to 5.5V  VOUT: 0.75V to 95% x VIN  IOUT: Up to 1A  Low RDS(ON) Switches Up to 95% Peak Efficiency  High Output Accuracy  Small Ceramic Capacitors  Power Good Pin (Open-Drain)  Patented Adaptive On-Time Control: Excellent Transient Response Programmable Pseudo-fixed Frequency  Fault Protection Features: Cycle-by-Cycle Current Limit Short Circuit Protection Over and Under Output Voltage Protection Over-Temperature  Internal Soft start  Ultrasonic Power Save  Smart Power Save  Ultra-Small Lead-Free 3x3mm, 10-Pin MLPD Package  Fully WEEE and RoHS Compliant Applications  Networking Equipment, Embedded Systems  Medical Equipment, Office Automation  Instrumentation, Portable Systems  Consumer Devices (DTV, Set-top Box, ... )  5V POL Converters Description The SC171 is an integrated, synchronous 1A EcoSpeedTM step-down regulator, which incorporates Semtech’s advanced, patented adaptive on-time architecture to achieve best-in-class performance in dynamic point-ofload applications. The input voltage range is 3V to 5.5V with a programmable output voltage from 0.75V up to 95% x VIN. The device features low-RDS(ON) internal switches and optional PSAVE mode for high efficiency across the output load range. Adaptive on-time control provides programmable pseudo-fixed frequency operation and excellent transient performanc...