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1FEATURES

2? ±1.5% Typical VOUT Tolerance

? 420mV Typical Dropout @ 1.0A (VO = 5V)

? Wide Operating Range 2.7V to 10V

? Internal 1.0A PMOS Output Transistor

? 19μA Typical Quiescent Current

? Thermal Overload Limiting

? Foldback Current Limiting

? Zener Trimmed Bandgap Reference

? Space Saving WSON package

? Temperature Range

– LP8340C 0°C to 125°C

– LP8340I ?40°C to 125°C

APPLICATIONS

? Hard Disk Drives

? Notebook Computers

? Battery Powered Electronics

? Portable Instrumentation

DESCRIPTION

The LP8340 low-dropout CMOS linear regulator is

available in 5V, 3.3V, 2.5V, 1.8V and adjustable

output versions. Packaged in the 6ld WSON package

and 3ld PFM. The LP8340 can deliver up to 1.0A

output current.

Typical dropout voltage is 420mV at 1.0A for the 5.0V

version, 540mV at 1.0A for the 3.3V version, 670mV

at 1.0A for the 2.5V version and 680mV at 800mA for

the 1.8V version.

The LP8340 includes a zener trimmed bandgap

voltage reference, foldback current limiting and

thermal overload limiting.

The LP8340 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.