IMP1117AS18X/T

IMP1117 ISO 9001 Registered 1A Adjustable/Fixed Low Dropout Linear Regulator General Description Key Features The IMP1117-ADJ and IMP1117-1.2,-1.5,-1.8,-2.5,-2.85, -3.3 and-5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the IMP1117 flows into the load, increasing efficiency. - Low dropout voltage - Load regulation: 0.2% typical - Optimized for Low Voltage - On-chip thermal limiting - Standard SOT-223 and TO-252 packages - Three-terminal adjustable or fixed low dropout 1.2V,1.5V,1.8V, 2.5V, 2.85V, 3.3V, 5V. Regulators Applications - Active SCSI terminators - High efficiency linear regulators - Post regulators for switching supplies - Battery chargers - 12V to 5V linear regulators -Motherboard clock supplies The IMP1117 series regulators are available in the industry-standard SOT-223 and TO-252 power packages. Typical Application Figure 1. Typical Applications of IMP1117 Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance Daily Silver IMP www.ds-imp.com.cn 1 IMP1117 ISO 9001 Registered 1A Adjustable/Fixed Low Dropout Linear Regulator Pin Assignments Figure 2. Pin Assignments of IMP1117 *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA can vary from 30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. Absolute Maximum Ratings Parameter Min. VIN 18 (VIN – VOUT) * IOUT See Figure 3 Unit V Operating Junction Temperature Range 0 125 °C Storage Temperature Range -65 150 °C 300 °C Lead Temperature (Soldering, 10 sec.) Daily Silver IMP Max. www.ds-imp.com.cn 2 IMP1117 ISO 9001 Registered 1A Adjustable/Fixed Low Dropout Linear Regulator Block Diagram VIN Thermal Limit Current Limit VOUT Substrate GND (fixed output) ADJ. (adjustable output) Figure 3. Block Diagram of IMP1117 Electrical Characteristic Typicals and limits appearing in normal type apply for TJ=25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation,0℃to 125℃. Symbol VREF VOUT Min (Note 2) Typ (Note 1) Max (Note 2) Units 1.225 1.250 1.275 V IOUT = 10mA, VIN = 3.2V 1.176 1.200 1.224 IMP1117-1.2 ,2.7V