SC173A TM 3A EcoSpeed Synchronous Step-Down Regulator with Automatic Power Save POWER MANAGEMENT Features Description V : 3V to 5.5V IN The SC173A is an integrated, synchronous 3A V : 0.75V to 95% x V TM OUT IN EcoSpeed step-down regulator, which incorporates I : Up to 3A OUT Semtechs advanced, patented adaptive on-time archi- Low R Switches DS(ON) tecture to achieve best-in-class performance in dynamic Up to 96% Peak Efficiency point-of-load applications. The input voltage range is 3V Enable High Threshold: 1V to 5.5V with a programmable output voltage from 0.75V Compatible with Low Voltage Logic up to 95% x V . The device features low-R internal IN DS(ON) High Output Accuracy switches and automatic power save for high efficiency Small Ceramic Capacitors across the output load range. Power Good Pin (Open-Drain) Patented Adaptive On-Time Control: Adaptive on-time control provides programmable pseu- Excellent Transient Response do-fixed frequency operation and excellent transient Programmable Pseudo-fixed Frequency performance. The switching frequency can be set from Fault Protection Features: 200kHz to 1MHz - allowing the designer to reduce exter- Cycle-by-Cycle Current Limit nal LC filtering and minimize light load (standby) losses. Short Circuit Protection Over and Under Output Voltage Protection Additional features include cycle-by-cycle current limit, Over-Temperature soft start, input UVLO and output OV protection, and Internal Soft start over temperature protection. The open-drain PGOOD Smart Power Save pin provides output status. Standby current is less than Ultra-Small Lead-Free 3x3mm, 10-Pin MLPD Package 10A when disabled. Fully WEEE and RoHS Compliant Applications The device is available in a low profile, thermally en - hanced MLPD-3x3mm 10-pin package. Networking Equipment, Embedded Systems Medical Equipment, Office Automation Instrumentation, Portable Systems Consumer Devices (DTV, Set-top Box, ... ) 5V POL Converters Typical Application Circuit 3 to 5.5V VIN BST VOUT = 0.75V to 95% VIN LX SC173A VDD FB PGOOD Power Good Enable EN TON PGND AGND December 16 , 2010 2010 Semtech Corporation 1SC173A Pin Configuration Ordering Information (2) Device Top Mark Package (1) SC173AMLTRT 173A MLPD-10 3x3 SC173AEVB Evaluation Board VDD BST Notes: VIN AGND 1) Available in tape and reel packaging only. A reel contains 3000 devices. LX TON 2) Available in lead-free packaging only. WEEE compliant and Halogen free. This component and all homogenous sub-components are RoHS PGND EN compliant. PGOOD FB 10 Pin MLPD = 40C/W. JA Marking Information TOP MARKING 173A yyww xxxx yyww = Date Code (Example: 0952) xxxx = Semtech Lot Number (Example: 3901) 2010 Semtech Corporation 2