LP8345

LP8345 Low Dropout, Low IQ, 500mA CMOS Linear Regulator October 2003 LP8345 Low Dropout, Low IQ, 500mA CMOS Linear Regulator General Description The LP8345 low-dropout CMOS linear regulator are available 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 reference, foldback current limiting and thermal overload limiting. 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 n n n n n n n n n ± 1.5% Typical VOUT tolerance 210mV Typical Dropout @ 500mA (VO = 5V) Wide Operating Range 2.7V to 10V Internal 500mA PMOS Output Transistor 19µA Typical Quiescent Current Thermal Overload Limiting Foldback Current Limiting Zener Trimmed Bandgap Reference Space saving LLP package Temperature Range — LP8345C 0˚C to 125˚C — LP8345I −40˚C to 125˚C Applications n n n n Hard Disk Drives Notebook Computers Battery Powered Electronics Portable Instrumentation Typical Applications Fixed VOUT 20064801 Adjustable VOUT 20064802 © 2003 National Semiconductor Corporation DS200648 www.national.com LP8345 Or...