LP8345 National Semiconductor, LP8345 Datasheet
LP8345
Manufacturer Part Number
LP8345
Description
Low Dropout/ Low IQ/ 500mA CMOS Linear Regulator
Manufacturer
National Semiconductor
Datasheet
1.LP8345.pdf
(13 pages)
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© 2003 National Semiconductor Corporation
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
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.
Typical Applications
@
500mA is 210mV for the 5.0V
DS200648
Adjustable V
Fixed V
Features
n
n 210mV Typical Dropout
n Wide Operating Range
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
Applications
n Hard Disk Drives
n Notebook Computers
n Battery Powered Electronics
n Portable Instrumentation
OUT
±
— LP8345C
— LP8345I
OUT
1.5% Typical V
OUT
tolerance
20064801
20064802
@
500mA (V
O
= 5V)
−40˚C to 125˚C
October 2003
www.national.com
0˚C to 125˚C
2.7V to 10V
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