參數(shù)資料
型號(hào): LP8345
廠商: National Semiconductor Corporation
英文描述: Low Dropout, Low IQ, 500mA CMOS Linear Regulator
中文描述: 低壓差,低IQ,500mA的CMOS線性穩(wěn)壓器
文件頁(yè)數(shù): 1/13頁(yè)
文件大?。?/td> 283K
代理商: LP8345
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
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
— LP8345I
2.7V to 10V
0C to 125C
40C to 125C
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
L
2003 National Semiconductor Corporation
DS200648
www.national.com
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