The AMS1117 series of adjustable and fixed voltage regulators are designed to provide up to 1A output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1.5%. Current limit is set to minimize 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.

Features

• Three Terminal Adjustable or Fixed Voltages: 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V
• Output Current of 1A
• Operates Downto 1V Dropout
• Line Regulation: 0.2% Max
• Load Regulation: 0.4% Max

Application

• High Efficiency Linear Regulators
• Post Regulators for Switching Supplies
• 5V to 3.3V Linear Regulator
• Battery Chargers
• Active SCSI Terminators
• Power Management for Notebook
• Battery Powered Instrumentation

Key Electrical Specifications

• Output Voltage: Fixed 3.3V (with an accuracy of ±1% to ± 2% at 25°C
• Maximum Output Current: 1A (typical current limit around 1.1A)
• Input Voltage (Max): 15V to 18V absolute maximum
• Dropout Voltage: 1.3V maximum at full 1A load (drops lower at smaller currents)
• Quiescent Current: Typically 5mA to 12mA operating supply current
• Line Regulation: 0.2% maximum
• Load Regulation: 0.4% maximum

Package contains 2 x ASM1117-3.3 Voltage Regulator