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LP8345CDTX-3.3 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LP8345CDTX-3.3 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 13 page LP8345 Low Dropout, Low IQ, 500mA CMOS Linear Regulator General Description The LP8345 low-dropout CMOS linear regulator are avail- able in 5V, 3.3V, 2.5V, 1.8V or adjustable output versions. Packaged in our 6ld LLP package and 3ld DPAK they can deliver up to 500mA output current. Typical dropout voltage @ 500mA is 210mV for the 5.0V version, 270mV for the 3.3V version and 335mV for the 2.5V version. The devices include a zener trimmed bandgap voltage ref- erence, foldback current limiting and thermal overload limit- ing. The LP8345 features a PMOS output transistor which unlike PNP type low dropout regulators requires no base drive current. This allows the device ground current to remain less than 50µA over operating temperature, supply voltage and irrespective of the load current. Features n ± 1.5% Typical V OUT tolerance n 210mV Typical Dropout @ 500mA (V O = 5V) n Wide Operating Range 2.7V to 10V n Internal 500mA PMOS Output Transistor n 19µA Typical Quiescent Current n Thermal Overload Limiting n Foldback Current Limiting n Zener Trimmed Bandgap Reference n Space saving LLP package n Temperature Range — LP8345C 0˚C to 125˚C — LP8345I −40˚C to 125˚C Applications n Hard Disk Drives n Notebook Computers n Battery Powered Electronics n Portable Instrumentation Typical Applications Fixed V OUT 20064801 Adjustable V OUT 20064802 October 2003 © 2003 National Semiconductor Corporation DS200648 www.national.com |
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