嵌入式系统原理与设计 教学课件 作者 蒋建春 主编 AMS1117 3.3.pdfVIP

Advanced AMS1117 Monolithic 1A LOW DROPOUT VOLTAGE REGULATOR Systems FEATURES APPLICATIONS Three Terminal Adjustable or Fixed Voltages* High Efficiency Linear Regulators 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V Post Regulators for Switching Supplies Output Current of 1A 5V to 3.3V Linear Regulator Operates Down to 1V Dropout Battery Chargers Line Regulation: 0.2% Max. Active SCSI Terminators Load Regulation: 0.4% Max. Power Management for Notebook SOT-223, TO-252 and SO-8 package available Battery Powered Instrumentation GENERAL DESCRIPTION The The AMS1117 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry. The AMS1117 devices are pin compatible with other three-terminal SCSI regulators and are offered in the low profile surface mount SOT-223 package, in the 8L SOIC package and in the TO-252 (DPAK) plastic package. ORDERING INFORMATION: PACKAGE TYPE OPERATING JUNCTION TO-252 SOT-223